diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. We, the Free Software Foundation, use the +GNU General Public License for most of our software; it applies also to +any other work released this way by its authors. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/LEEME.txt b/LEEME.txt new file mode 100644 index 0000000..1aae667 --- /dev/null +++ b/LEEME.txt @@ -0,0 +1,170 @@ +**-Unhide-** + http://www.unhide-forensics.info + +Unhide es una herramienta forense que permite descubrir procesos y puertos TCP/UDP ocultos +por rootkits / LKMs o cualquier otra tecnica de ocultacion. + + +// Unhide (unhide-linux o unhide-posix) +// ------------------------------------- + +Permite identificar procesos que hayan sido ocultados. Implementa seis tecnicas: + +1- Comparacion de la informacion obtenida por /bin/ps frente a los directorios en /proc + +2- Comparacion de la informacin obtenida de /bin/ps contra la estructura de directorios de /proc + SOLO para la versión "unhide-linux" + +3- Comparacion de la informacion visible por /bin/ps frente a la que se puede obtener + utilizando diversas sycalls del sistema (syscall scanning). + +4- Busqueda de incoherencias entre el resultado de /bin/ps y la informacion obtenida en /proc y syscall scanning (Reverse scanning) + SOLO para la versión "unhide-linux" + +5- Ocupacion por fuerta bruta del espacio de PIDs disponibles en el sistema (PIDs bruteforcing) + SOLO para la versión "unhide-linux" + +6- Escaneo 'rapido' de informacion usando /proc procfs y syscalls + SOLO para la versión "unhide-linux". Es un test notablemente más rápido que usar de forma independiente los test 1/2/3 pero + mas propenso a dar falsos positivos + +// Unhide_rb +// --------- + +Es un port en el lenguaje de programación C de unhide.rb, proyecto alternativo a Unhide +Como el original, es tan solo una aproximación ligera de Unhide + +- El hace solo tres test (kill, opendir y chdir) +- Tan solo ejecuta /bin/ps al iniciar el escaneo y para el check doble +- Los tests realizados son mucho menos fiables (por ejemplo usar los valores de retorno en vez de errno) +- Los procesos son identificados tan solo por su ejecutable (unhide-linux también usa cmdline y 'sleeping kernel process') +- No obstante, incorpora unos pocos métodos anti-fallos, (fallos al usar popen por ejemplo) +- No tiene capacidad de logging + +Es bastante rápido, unas 80 veces más rápido que usar 'unhide-linux quick reverse' + +// Unhide-TCP + +Permite identificar puertos TCP/UDP que esten a la escucha pero no aparezcan listados +en /bin/netstat o sbin/ss, usa dos métodos: +- Fuerza bruta sobre todo el rango de puertos TCP/UDP disponibles y comparándolos con la salida de los comandos SS/netstat +- Probando todos los puertos TCP/UDP que no lista netstat + +// Ficheros + +unhide-linux.c --> Procesos ocultos, Linux 2.6.x +unhide-linux.h + +unhide-tcp.c --> Puertos tcp/udp ocultos +unhide-tcp-fast.c +unhide-tcp.h + +unhide-output.c --> Rutinas de uso para Unhide +unhide-output.h + + + +unhide_rb.c --> un port en C de unhide.rb (una versión muy simplificada de unhide-linux en Ruby) + +unhide-posix.c --> Procesos ocultos, Sistemas Unix (*BSD, solaris, linux 2.2, linux 2.4) No incorpora + PIDs bruteforcing, Necesita mas testing. Atención: Esta es una versión desactualizada de Unhide solo para sistemas antiguos + +changelog -- El log de cambios de Unhide + +COPYING -- Fichero de licencia, GNU GPL V3 + +LISEZ-MOI.TXT -- Versión francesa de este fichero + +NEWS -- Novedades relacionadas con las versiones + +README.txt -- Versión inglesa de este fichero + +sanity.sh -- Fichero para realizar tests de funcionamiento + +TODO -- Cosas pendientes de hacer (¿Algún voluntario?) + +man/unhide.8 -- Página man en inglés + +man/unhide-tcp.8 -- Página man de unhide-tcp en inglés + +man/fr/unhide.8 -- Página man en Francés de unhide + +man/fr/unhide-tcp.8 -- Página man en Francés de unhide-tcp + +man/es/unhide.8 -- Página man de unhide en Español + +man/es/unhide-tcp.8 --Página man de unhide-tcp en Español + + +// Compilación + +Para compilar Unhide es necesario: + glibc-devel + glibc-static-devel + +Y las siguientes dependencias: +- unhide-tcp para linux : + iproute2 + net-tools (para netstat) + lsof + psmisc (para fuser) +- unhide-tcp para freeBSD : + sockstat + lsof + netstat + +unhide-linux, unhide-posix, unhide_rb : + procps + +Si estás usando un kernel de Linux > = 2.6 + gcc -Wall -O2 --static -pthread unhide-linux*.c unhide-output.c -o unhide-linux + gcc -Wall -O2 --static unhide_rb.c -o unhide_rb + gcc -Wall -O2 --static unhide-tcp.c unhide-tcp-fast.c unhide-output.c -o unhide-tcp + ln -s unhide unhide-linux + +Si no,(Linux < 2.6, *BSD, Solaris and other Unix) + gcc --static unhide-posix.c -o unhide-posix + ln -s unhide unhide-posix + +// Utilización + +TIENE QUE SER root para usar unhide + + +Ejemplos: + + # ./unhide-linux -vo quick reverse + # ./unhide-linux -vom procall sys + # ./unhide_rb + + # ./unhide-tcp -flov + # ./unhide-tcp -flovs + + +// Licencia + +GPL V.3 (http://www.gnu.org/licenses/gpl-3.0.html) + +// Agradecimientos + +A. Ramos (aramosf@unsec.net) Por aportar algunas expresiones regulares + +unspawn (unspawn@rootshell.be) Soporte en CentOS + +Martin Bowers (Martin.Bowers@freescale.com) Soporte en CentOS + +Lorenzo Martinez (lorenzo@lorenzomartinez.homeip.net) Por aportar varias ideas y betatesting + +Francois Marier (francois@debian.org) Por crear las paginas man y dar soporte en Debian + +Johan Walles (johan.walles@gmail.com) Por encontrar y solucionar un importante fallo del tipo "condicion de carrera" + +Jan Iven (jan.iven@cern.ch) Por sus magníficas mejoras, nuevos tests y bugfixing + +P. Gouin (pg.bug.cvs.pgn@free.fr) Por su increible trabajo 'fixeando' bugs y mejorando el rendimiento + +François Boisson por su idea de un doble control en el test 'brute' + +Leandro Lucarella (leandro.lucarella@sociomantic.com) por el modo de escaneo rápido y la re-escritura de unhide-tcp + +Nikos Ntarmos (ntarmos@ceid.upatras.gr) Por su inestimable labor ayudando a portar Unhide a FreeBSD y por hacer el empaquetado para FreeBSD. diff --git a/LISEZ-MOI.TXT b/LISEZ-MOI.TXT new file mode 100644 index 0000000..4412ebc --- /dev/null +++ b/LISEZ-MOI.TXT @@ -0,0 +1,184 @@ +**-Unhide-** + http://www.unhide-forensics.info + +Unhide est un outil d'investigation dont le rôle est de détecter les processus et les +flux TCP/UDP cachés par les rootkits / LKM ou par d''autres techniques de masquage. + +Le paquet comprend quatre utilitaires : unhide-posix, unhide-linux, unhide_rb et unhide-tcp. + +// unhide (unhide-posix, unhide-linux) +// ----------------------------------- + +Détection de processus cachés. Il met en œuvre six techniques principales + +1 - Comparaison de /proc avec la sortie de /bin/ps. + +2 - Comparaison des informations recueillies par le parcours de l'arborescence du + système de fichiers procfs avec les informations issues de /bin/ps . + Cette technique n'est disponible qu'avec la version unhide-linux. + +3 - Comparaison des informations collectées depuis des appels système avec les + informations issues de /bin/ps(syscall scanning). + +4 - Scan complet de l'espace des ID de processus par force brute (PIDs bruteforcing). + Cette technique n'est disponible qu'avec la version unhide-linux. + +5 - Comparaison de la sortie de /bin/ps avec /proc, le parcours de procfs et les + appels systèmes. + Recherche inverse afin vérifiez que tous les processus affichés par /bin/ps + existent réellement. + Cette technique n'est disponible qu'avec la version unhide-linux. + +6 - Comparaison rapide des informations recueillies dans /proc, par le parcours + de procfs et par lesappels systèmes avec la sortie de /bin/ps. + cette technique est environ 20 fois plus rapide que les 3 premières réunies + mais peut éventuellement donner davantage de faux positifs. + Cette technique n'est disponible qu'avec la version unhide-linux. + +// Unhide_rb +// --------- + +C'est un portage en langage C de l'utilitaire unhide_rb. +Comme l'original, il est grossièrement équivalent à "unhide-linux quick reverse" : +- il effectue trois tests de moins (kill, opendir and chdir), +- il lance /bin/ps seulement un fois au démarrage et une fois pour la double vérification, +- ses tests sont moins précis (P.ex. : test de la valeur de retour au lieu de errno), +- les processus sont uniquement identifiés par le lien sur leur exécutable (unhide-linux utilise + aussi la copie de la ligne de commande et le nom des "processus noyau dormant"), +- il y a peu de protection contre les erreurs (échec de fopen ou popen par exemple), +- il ne sait pas générer un fichier journal. +Il est très rapide, environ 80 fois plus que "unhide-linux quick reverse" + +// unhide-TCP +// ---------- + +Sert à identifier les ports TCP ou UDP qui sont en écoute mais qui ne sont pas +visibles par la commande /sbin/ss (ou /bin/netstat). +Deux techniques sont employées : +- Celle de la force brute (passage en revue de tous les ports TCP/UDP possibles) + et comparaison avec la sortie de SS/netstat. +- Test de tous les ports TCP/UDP non listés par netstat. + +// Fichiers +// -------- + +unhide-linux.c -- Recherche des processus cachés, pour les systèmes Linux >= 2.6 +unhide-linux.h -- Header pour unhide-linux + +unhide-tcp.c -- Recherche des ports TCP/UDP cachés (ss ou netstat) +unhide-tcp-fast.c -- Recherche des ports TCP/UDP cachés (recherche rapide) +unhide-tcp.h -- Header pour unhide-tcp + +unhide_rb.c -- Portage en C de unhide.rb (une version très allégée de unhide-linux en ruby) + +unhide-posix.c -- Recherche des processus cachés, pour les systèmes Unix génériques (*BSD, + Solaris, Linux 2.2 / 2.4) + Il ne met en œuvre que les techniques 1 et 3. Besoin de plus de tests + Avertissement: Cette version est quelque peu obsolète, et peut générer + des faux positifs. Utilisez unhide-linux.c si c'est possible'. + +unhide-output.c -- Routines de sortie utilisés par les autres modules de unhide +unhide-output.h -- Header de unhide-output + +changelog -- liste des évolutions apportées à unhide + +COPYING -- Fichier de Licence, GNU GPL V3 + +LEEME.txt -- Version espagnole de ce fichier + +LISEZ-MOI.TXT -- Ce fichier + +NEWS -- Notes de version + +README.txt -- Version anglaise de ce fichier + +sanity.sh -- Fichier de test de unhide-linux + +TODO -- Liste des évolutions envisagées (des volontaires ?) + +man/unhide.8 -- man page en anglais de unhide + +man/unhide-tcp.8 -- man page en anglais de unhide-tcp + +man/es/unhide.8 -- man page en espagnol de unhide + +man/es/unhide-tcp.8 -- man page en espagnol de unhide-tcp + +man/fr/unhide.8 -- man page en français de unhide + +man/fr/unhide-tcp.8 -- man page en français de unhide-tcp + + +// Compilation +// ----------- + +Prérequis de build + glibc-devel + glibc-static-devel + +Prérequis d'utilisation +- unhide-tcp under linux : + iproute2 + net-tools (for netstat) + lsof + psmisc (for fuser) +- unhide-tcp under freeBSD : + sockstat + lsof + netstat +unhide-linux, unhide-posix, unhide_rb : + procps + + + +Si vous utilisez un noyau Linux >= 2.6 + gcc -Wall -O2 --static -pthread unhide-linux*.c unhide-output.c -o unhide-linux + gcc -Wall -O2 --static unhide_rb.c -o unhide_rb + gcc -Wall -O2 --static unhide-tcp.c unhide-tcp-fast.c unhide-output.c -o unhide-tcp + ln -s unhide unhide-linux + +Sinon (Linux < 2.6, *BSD, Solaris, etc.) + gcc --static unhide-posix.c -o unhide-posix + ln -s unhide unhide-posix + +// Utilisation +// ----------- +Vous DEVEZ être root pour utiliser unhide + +Exemples: + # ./unhide-linux -vo quick reverse + # ./unhide-linux -vom procall sys + # ./unhide_rb + + # ./unhide-tcp -flov + # ./unhide-tcp -flovs + +// Licence + +GPL V.3 (http://www.gnu.org/licenses/gpl-3.0.html) + + +// Remerciement +// ------------ + +A. Ramos (aramosf@unsec.net) pour certaines expressions rationnelles + +unspawn (unspawn@rootshell.be) support CentOS + +Martin Bowers (Martin.Bowers@freescale.com) soutien CentOS + +Lorenzo Martinez (lorenzo@lorenzomartinez.homeip.net) pour ses idées d'amélioration et le betatesting + +François Marier (francois@debian.org) Auteur des pages de manuel et le support Debian + +Johan Walles (johan.walles@gmail.com) Identification et correction d'un bug très désagréable de concurrence critique (race condition) + +Jan Iven (jan.iven@cern.ch) En raison de ses grandes améliorations, de nouveaux tests et de corrections de bugs + +P. Gouin (patrick-g@users.sourceforge.net) En raison de son travail incroyable correction des bugs et d'amélioration des performances + +François Boisson pour l'idée de la double vérification dans le test "brute". + +Leandro Lucarella (leandro.lucarella@sociomantic.com) pour la méthode rapide de balayage et son travail de factorisation de unhide-tcp + +Nikos Ntarmos (ntarmos@ceid.upatras.gr) pour son aide inestimable pour le portage de unhide-tcp sur FreeBSD. diff --git a/NEWS b/NEWS new file mode 100644 index 0000000..29aae87 --- /dev/null +++ b/NEWS @@ -0,0 +1,130 @@ +Changes since 20121229 : +********************** + +BUG FIXES + - include in unhide-output.h, some old gcc/glibc need it. + +SUPPORT FOR PORTING + - On non Linux OS, ss is not used by default by unhide-tcp. + This way, FreeBSD guys should be able to package without patching unhide source :) + - On FreeBSD, use sockstat instead of fuser. + +MISCELLANOUS + + - The unhide files in the tarball are again contained in a directory (unhide-YYYYMMDD) + - The name of the tarball uses again a '-' not a '_'. + - Help packagers: in unhide-posix.c, unhide-output.c, unhide-tcp.c, OS specific + command are put between #ifdef instead of beeing commented. + - Correct banner of unhide-posix. + - Update manpages. + - Add build/use require list in readme files + + + +Changes since 20110113 : +********************** + +IMPORTANT + + - unhide-linux26.c was renamed to unhide-linux.c + - unhide.c was renamed to unhide-posix.c + - The log file of unhide-linux is renamed 'unhide-linux_AAAA-MM-DD.log' + - The log file of unhide-tcp is named 'unhide-tcp_AAAA-MM-DD.log' + - By default, unhide-tcp now use /sbin/ss from iproute2 package, to use + netstat as before '-n' option must be given on command line. + - Display is more verbose and multi-lines for hidden processes (unhide-linux). + - If asked to (-l and/or -f), display is more verbose and multi-lines for hidden ports (unhide-tcp). + - sysinfo test is no more called as part of compound quick and sys tests as it may give false positives. + It could still be run using the checksysinfo, checksysinfo2 or checksysinfo3 command line parameter. + +NEW FEATURES + + - Major enhancement of unhide-tcp : + * Add capability to output a log file (unhide-tcp_AAA-MM-DD.log) + * Add capability to output more information (via lsof and/or fuser) on hidden port if available + * Add verbose mode (disabled by default) to display warning + * Add a new method (via option '-s') very fast on system with huge number of opened ports + * Make a double check of port access to avoid false positive (previous single check + version is available as unhide-tcp-simple-check.c if needed). + - Add a quick port in C language of unhide.rb (unhide_rb.c) and guess what ... + it's 40 times faster than original ruby unhide.rb + unhide_rb doesn't take any option. + - Add "-d" option for doing a double check in brute test, this reduce false positives. + - Add "-o" option as synonym of "-f". + - For found hidden processes, display the user and the working directory + as extracted from the process environment. Note that it doesn't work well + for kernel processes/threads nor for deamons. + - For found hidden processes, display cmdline, exe link and internal command name. + +MISCELLANOUS + + - Add french and spanish man page for unhide-tcp + - Update english manpage of unhide-tcp to reflect changes + - Minor corrections in french manpage of unhide + - Display copyright and license information in start banners. + - Make message from sysinfo tests more clear. + - Add a NEWS file :) + - Update README.txt, LISEZ-MOI.txt and LEEME.txt to clarify difference between + unhide-posix and unhide-linux. + - Remove sysinfo test from quick and sys compound tests as it may give false positive. + sysinfo test still can be used via the checksysinfo[2|3] command line parameters. + +BUG FIXES + + - Suppress pedantic compilation warnings (glibc >=2.3, gcc >=4.6). + - Correct the number of processes displayed for /proc counting in sysinfo test. + +Changes since 20100819 : +********************** + +NEW FEATURES + + - Add spanish man page + - Add additional check to checkopendir when -m is specified. + - Add a option (-f) to create a log file. + - Add checkopendir test (also called by procfs and procall compound test) + - Also do opendir() test in reverse and quick tests. + - Add alternate sysinfo test (via -r option or checksysinfo2 test name) + - Make the output of hidden process on one line to facilitate parsing + - Display wchan if there is no cmdline and no exe link (sleeping kernel threads) + - Add -V version to show version and exit. + - The -v option can now be given more than once on command line : management of several verbosity level. + - Now several tests can be simultaneously entered on the command line. + - Add all elementary tests to the command line test list + - Add procall compound test command line args. + - Check for our own spawn ps process in reverse test to avoid false positive. + - Enhanced fake process detection in reverse test. + +BUG FIXES + + - Correct warning message in additional check of checkchdir. + - Close log file only if it is open. + - Correct the value returned by unhide + - Add the misssing new lines in most of the warnings (thanks to gordy for the report). + - Check the return of fgets in checkallreverse(), check of feof seems not to be + very reliable for a pipe, we sometime got the last line 2 times (thanks to gordy for the report). + - Correct an initialized fd use, that gcc don't report when -O2 isn't given on command line + +DEVELOPER ISSUES + + - Minor readability when generating program info for display + - Factorize (f)printf to stdout & log. + - Add a preliminary testsuite for unhide (sanity.sh) + - Use printbadpid() in checkallnoprocps() as in other tests. + - Also check it in checksysinfo & checksysinfo2 + - Simplify and clarify test checksysinfo() + - Redo args parsing : Manage multiple args on command line and several verbosity levels. + - Add a tests table to allow new command line parsing. + - Correct a copy/past "typo", in checkps + - Minor optimizations of printf & sprintf calls. + +MISCELLANOUS + + - Add a NEWS file + - Add GPL disclaimer to source files + - Add french LISEZ-MOI.txt file + - Add reference to new unhide site in version string + - Add a warning about the generic version of unhide in README.txt (thanks to gordy for the report) + - Modify man page to add the -V option, correct typos and clarify quick test. + - Add -O2 option to compiling command line in README.txt + - Add a TODO file diff --git a/README.txt b/README.txt new file mode 100644 index 0000000..ec7f5b7 --- /dev/null +++ b/README.txt @@ -0,0 +1,164 @@ +**-Unhide-** + http://www.unhide-forensics.info + +Unhide is a forensic tool to find hidden processes and TCP/UDP ports by rootkits / LKMs +or by another hiding technique. + +// Unhide (unhide-linux or unhide-posix) +// ------------------------------------- + +Detecting hidden processes. Implements six main techniques + +1- Compare /proc vs /bin/ps output + +2- Compare info gathered from /bin/ps with info gathered by walking thru the procfs. ONLY for unhide-linux version + +3- Compare info gathered from /bin/ps with info gathered from syscalls (syscall scanning). + +4- Full PIDs space ocupation (PIDs bruteforcing). ONLY for unhide-linux version + +5- Compare /bin/ps output vs /proc, procfs walking and syscall. ONLY for unhide-linux version + Reverse search, verify that all thread seen by ps are also seen in the kernel. + +6- Quick compare /proc, procfs walking and syscall vs /bin/ps output. ONLY for unhide-linux version + It's about 20 times faster than tests 1+2+3 but maybe give more false positives. + +// Unhide_rb +// --------- + +It's a back port in C language of the ruby unhide.rb +As the original unhide.rb, it is roughly equivalent to "unhide-linux quick reverse" : +- it makes three tests less (kill, opendir and chdir), +- it only run /bin/ps once at start and once for the double check, +- also, its tests are less accurate (e.g.. testing return value instead of errno), +- processes are only identified by their exe link (unhide-linux also use cmdline and + "sleeping kernel process" name), +- there's little protection against failures (failed fopen or popen by example), +- there's no logging capability. +It is very quick, about 80 times quicker than "unhide-linux quick reverse" + +// Unhide-TCP +// ---------- + +Identify TCP/UDP ports that are listening but not listed in sbin/ss or /bin/netstat. +It use two methods: +- brute force of all TCP/UDP ports availables and compare with SS/netstat output. +- probe of all TCP/UDP ports not reported by netstat. + +// Files +// ----- + +unhide-linux.c -- Hidden processes, for Linux >= 2.6 +unhide-linux.h + +unhide-tcp.c -- Hidden TCP/UDP Ports +unhide-tcp-fast.c +unhide-tcp.h + +unhide-output.c -- Common routines of unhide tools +unhide-output.h + +unhide_rb.c -- C port of unhide.rb (a very light version of unhide-linux in ruby) + +unhide-posix.c -- Hidden processes, for generic Unix systems (*BSD, Solaris, linux 2.2 / 2.4) + It doesn't implement PIDs brute forcing check yet. Needs more testing + Warning : This version is somewhat outdated and may generate false positive. + Prefer unhide-linux.c if you can use it. + +changelog -- As the name implied log of the change to unhide + +COPYING -- License file, GNU GPL V3 + +LEEME.txt -- Spanish version of this file + +LISEZ-MOI.TXT -- French version of this file + +NEWS -- Release notes + +README.txt -- This file + +sanity.sh -- unhide-linux testsuite file + +TODO -- Evolutions to do (any volunteers ?) + +man/unhide.8 -- English man page of unhide + +man/unhide-tcp.8 -- English man page of unhide-tcp + +man/fr/unhide.8 -- French man page of unhide + +man/fr/unhide-tcp.8 -- French man page of unhide-tcp + +// Compiling +// --------- + +Build requires + glibc-devel + glibc-static-devel + +Require +- unhide-tcp under linux : + iproute2 + net-tools (for netstat) + lsof + psmisc (for fuser) +- unhide-tcp under freeBSD : + sockstat + lsof + netstat + +unhide-linux, unhide-posix, unhide_rb : + procps + + +If you ARE using a Linux kernel >= 2.6 + gcc -Wall -O2 --static -pthread unhide-linux*.c unhide-output.c -o unhide-linux + gcc -Wall -O2 --static unhide_rb.c -o unhide_rb + gcc -Wall -O2 --static unhide-tcp.c unhide-tcp-fast.c unhide-output.c -o unhide-tcp + ln -s unhide unhide-linux + +Else (Linux < 2.6, *BSD, Solaris and other Unice) + gcc --static unhide-posix.c -o unhide-posix + ln -s unhide unhide-posix + +// Using +// ----- +You MUST be root to use unhide-linux and unhide-tcp. + +Examples: + # ./unhide-linux -vo quick reverse + # ./unhide-linux -vom procall sys + # ./unhide_rb + + # ./unhide-tcp -flov + # ./unhide-tcp -flovs + +// License +// ------- + +GPL V.3 (http://www.gnu.org/licenses/gpl-3.0.html) + +// Greets +// ------ + +A. Ramos (aramosf@unsec.net) for some regexps + +unspawn (unspawn@rootshell.be) CentOS support + +Martin Bowers (Martin.Bowers@freescale.com) CentOS support + +Lorenzo Martinez (lorenzo@lorenzomartinez.homeip.net) Some ideas to improve and betatesting + +Francois Marier (francois@debian.org) Author of the man pages and Debian support + +Johan Walles (johan.walles@gmail.com) Find and fix a very nasty race condition bug + +Jan Iven (jan.iven@cern.ch) Because of his great improvements, new tests and bugfixing + +P. Gouin (patrick-g@users.sourceforge.net) Because of his incredible work fixing bugs and improving the performance + +François Boisson for his idea of a double check in brute test + +Leandro Lucarella (leandro.lucarella@sociomantic.com) for the fast scan method and his factorization work for unhide-tcp + +Nikos Ntarmos (ntarmos@ceid.upatras.gr) for its invaluable help in the FreeBSD port of unhide-tcp and for packaging unhide on FreeBSD. diff --git a/TODO b/TODO new file mode 100644 index 0000000..e4a1ed8 --- /dev/null +++ b/TODO @@ -0,0 +1,25 @@ +[TODO] +- Integrate -m in other test, +- Try to factorize the code, +- More optimizations, +- Add a mail sending option, +- Beautify the source (add comments, function headers, etc.), +- Add a version number beside date of release, +- Localize (have you already used gettext ?), create man pages in other language +- Add an install script or use autotools/cmake/something else. +- Upgrade the generic version of unhide with some of the enhancements of the + linux26 version. +- Others ... + + +[DONE] +- Make a meta proc test that involves all /proc test (proc and procfs) +- Add more verbosity level, +- Sanitize the exit code, +- Make a better command line parsing (without getopt:), +- Put it in a CVS/SVN/Git repo, unhide is on sourceforge. +- Create a TODO file :), you're reading it +- Add an option (-x for expert ?) which allows to run subtest individually. + Done without the use of a special option +- Add a option (-f ) to create a log file, (not everybody use unhide via RKH) +- Add a test script to reliably test new version (preliminary version). diff --git a/changelog b/changelog new file mode 100644 index 0000000..eca8707 --- /dev/null +++ b/changelog @@ -0,0 +1,370 @@ +2013-05-26 + unhide-posix.c + - Transform 'ret' in global variable to avoid warnings + (note: ret variable was added to avoid warnings with some over pedantic + version of glibc and is otherwise useless). + +2013-05-24 + unhide-tcp.8 (spanish version), LEEME.txt + - update according to english version. + +2013-03-03 + unhide-posix.c + - Bugfix : Correct app name in banner of unhide-posix. + + unhide-tcp.c + - Continue to simplify packager job: + * on FreeBSD use sockstat instead of fuser, which doesn't show info on internet socket + on this system. + + README.txt, LISEZ-MOI.txt + - Add list of build-requires and use-requires + + unhide-tcp.8 (french and english version) + - Add notes upon FreeBSD. + +2013-02-03 + unhide-output.h + - Bugfix : include , some old glibc need it + + unhide-posix.c, unhide-output.c, unhide-tcp.c + - Simplify packager job: + * put OS specific command between #ifdef (they were previously commented), + * don't use ss by default in unhide-tcp if OS is not linux, + * on FreeBSD use sockstat instead of fuser, which doesn't show info on internet socket + on this system. + + make_tarball.sh + - Change '_' to '-' in the name of the tarball + - Make sure that unhide files are in a unhide-YYYYMMDD directory. + +2012-12-29 + Promote unhide-tcp-double_check.c as official version of unhide-tcp. Old version + is still available as unhide-tcp-simple-check.c + + unhide-linux, unhide-posix, unhide-tcp, unhide-tcp-simple-check, unhide_rb : + - update date of the version for official release. + + +2012-12-18 + unhide-linux, unhide-posix, unhide-tcp, unhide_rb : + - update date of the version + unhide-tcp : + - Suppress 1 warning with some over pedantic version of glibc. + +2012-12-12 + unhide-linux : + - In unhide-linux-syscall, transform ret in global variable to avoid warning + (note ret variable was added to avoid warning with some over pedantic version of glibc + ans is otherwise useless). + Correct sched_getaffinity test in checkallnoprocps (it tested ret instead of errno). + unhide-tcp : + - Avoid to display the banner twice. + unhide_rb : + - Suppress warning. + +2012-12-07 + unhide-linux : + - Remove sysinfo from quick and sys test as it may give false positive. + + unhide-tcp : + - Nice ourself to -20 to limit race condition while probing ports. + +2012-10-07 + unhide-linux : + - Go back to multi-lines output in printbadpid in order to display more known + information about the process. + +2012-10-03 + unhide-linux : + - Fix the name displayed for kernel thread (we used /proc/PID/wchan instead of + /proc/PID/comm). + +2012-09-05 + unhide-linux, unhide-tcp : + - Add test to verify we're run by root. + +2012-09-02 + unhide-linux : + - Remove useless calls to feof(). + - Split unhide-linux.c in 5 files : + * unhide-linux-bruteforce.c + * unhide-linux.c + * unhide-linux-compound.c + * unhide-linux-procfs.c + * unhide-linux-syscall.c + - Add option '-o' as synonym for '-f' + - Add a parse_arg() function which use getopt_long(). + - For found hidden processes, display the user and the working directory + as extracted from the process environment. + +2012-08-31 + unhide-linux : + - Use unhide-output routines for display and log. + - Change logfile filename to 'unhide-linux_AAAA-MM-DD.log' + - Add header file for unhide-linux + +2012-08-22 + unhide-tcp : + - Change the default tools to be ss instead of netstat. + - Replace option '-s' (use ss) by option '-n' (use netstat). + - Change option '-q' in '-s' with the same effect + +2012-06-03 + unhide-tcp : + - Thanks to a patch of Leandro Lucarella and additional work from + the unhide team, a major rewriting was done : + * Factorization & clean-up of the code + * Split the code in 4 files : unhide-tcp.c, unhide-fast.c, unhide-output.c + & unhide.h + * Add a new method for scanning ports via option '-q' + - Add a option '-s' to use ss command instead of nestat. + - Use getopt_long() to parse options and then add long option strings. + - Change logfile filename to 'unhide-tcp_AAAA-MM-DD.log' + - Many minor bug fixes (mainly display ones) + +2012-03-18 + unhide-linux26.c, unhide-posix.c, unhide-tcp.c : + - Change copyright attribution. + + unhide_rb.c : + - Add banner display at start. + + unhide-linux26.c : + - Change reserved process reserved for kernel from 299 to 300 for brute test. + - Add "-d" option for doing a double check in brute test, this reduce false positive number. + Thanks to François Boisson for the idea. + - Change log file name to unhide-linux.log + + Documentation changes : + - Add example section in manpages. + - Indicate in bug section of manpages, the potential problem with sysinfo test. + +2012-03-17 + Important changes : + - Rename unhide-linux26.c to unhide-linux.c and unhide.c to unhide-posix.c. + - Update readme files and manpages to reflect the renaming + - Add unhide_rb description to readme files. + +2012-03-11 + unhide-linux26.c : + - Correct the number of processes displayed for /proc counting in sysinfo test. + + unhide.c : + - Correct banner (POSIX -> UNIX). + + Documentation changes : + - Update README.txt, LISEZ-MOI.txt and LEEME.txt to clarify difference between + unhide and unhide-linux26. + +2012-03-10 + unhide-linux26.c : + - Fix pedantic compilation warnings reported when using recent version of glibc. + - Change report messages of checksysinfoX tests to make them clearer. + - Update banner to indicate this version is for system using Linux >= 2.6 + + unhide.c : + - Update banner to indicate this is legacy version of unhide for system using + Linux < 2.6 or other UNIX system. + - Fix compilation warnings + +2011-10-31 + unhide-linux26.c : + - Add copyright and license output. + + unhide-tcp.c : + - Add copyright and license output. + - Add -v, -V, -h, -l, -f, -o command line options. + - Add the capability to output fuser (-f) and/or lsof (-l) output for hidden port. + - Add the capability to create a log file (-o). File name is unhide-tcp.log + + Documentation changes : + - Add a french manpage for unhide-tcp. + - Complete english manpage of unhide-tcp to reflect changes. + - Minor corrections in french manpage of unhide. + - Change compile command of unhide-tcp in README.txt, LISEZ-MOI.txt and LEEME.txt. + - Add info on unhide_rb in README.txt, LISEZ-MOI.txt and LEEME.txt. + - Update NEWS file. + +2011-02-08 + Documentation changes : + - Add a NEWS file + +2011-01-13 + All files : + - Replace reference to SourceForge with reference to new unhide web site in version string + + man pages : + - Add spanish man pages + +2010-11-21 + unhide-linux26.c : + Development changes : + - Minor readability when generating program info for display + +2010-11-21 + unhide-linux26.c : + User visible changes : + - Add additional check to checkopendir when -m is specified. + - Correct warning message in additional check of checkchdir. + - Add sourceForge project URL in header + + unhide.c : + - Add GPL disclaimer. + + unhide-tcp.c : + - Add GPL disclaimer. + + Documentation changes : + changelog : + - Fix an omission in 2010-11-14 Internal changes + + man pages : Development changes : + + - update french and english man pages wrt '-m' option and checkopendir + + Development changes : + - Correct message of test#1 of sanity.sh + - Use procall in test#2 of sanity.sh instead of proc + +2010-11-14 + unhide-linux26.c : + User visible changes : + - Add ending time to log file. + - Add execution header to log file. + - Change date format to ISO 8601 one's in log file. + - Add warning, when selected, to log file. + - Update english and french man page to reflect the add of '-f' option. + + Internal changes + - Close log file only if it is open. + - Factorize (f)printf to stdout & log. + + Documentation changes : + README.txt & LISEZ-MOI.TXT + - Minor clarifications. + - Add description of all the files included in unhide + + Development changes : + - Add a preliminary testsuite for unhide (sanity.sh) + +2010-11-09 + unhide-linux26.c : + User visible changes : + - Add a option (-f) to create a log file. + +2010-10-16 + Documentation changes : + LEEME.txt : + Correct compilation instruction. + Add reference to sourceforge site. + + README.txt + Add reference to sourceforge site. + Correct typo. + + LISEZ-MOI.TXT + Ajout du fichier + +2010-09-23 + unhide-linux26.c : + User visible changes : + - Add reference to sourceforge path to version string + + Documentation changes : + - Update man page to reflect all the change made so far. + +2010-09-23 + unhide-linux26.c : + User visible changes : + - Add checkopendir test (also called by procfs and procall compound test) + - Also do opendir() test in reverse and quick tests. + - Add alternate sysinfo test (via -r option or checksysinfo2 test name) + It's a reorganised checksysinfo() to put uncritical instructions out of the critical part + It might (or not) work better on kernel patched for RT, preemption or latency. + - Make the output of hidden process on one line to facilitate parsing + - Display wchan if there is no cmdline and no exe link (sleeping kernel threads) + - Add -V version to show version and exit. + - The -v option can now be given more than once on command line. + - Correct the value returned by unhide + - Add the misssing new lines in most of the warnings (thanks to gordy for the report). + - Completely redo args parsing : now several tests can be simultaneously + entered on the command line. + - Add all elementary tests to the command line test list + - Add procall compound test command line args. + + Internal changes + - Use printbadpid() in checkallnoprocps() as in other tests. + - Check the return of fgets in checkallreverse(), check of feof seems not to be + very reliable for a pipe, we sometime got the last line 2 times (thanks to gordy for the report). + - Also check it in checksysinfo & checksysinfo2 + - Simplify and clarify test checksysinfo() + - Check for our own spawn ps process in reverse test to avoid false positive. + - Enhanced fake process detection in reverse test. + - Add a tests table to allow new command line parsing. + - Add management of several verbosity level. + - Correct a copy/past "typo", in checkps + - Correct an initialized fd use, that gcc don't report when -O2 isn't given on command line + - Minor optimizations of printf & sprintf calls. + + Documentation changes : + - Add a warning about the generic version of unhide in README.txt (thanks to gordy for the report) + - Modify man page to add the -V option, correct typos and clarify quick test. + - Add -O2 option to compiling command line in README.txt + - Add a TODO file + +2010-08-19 + unhide-linux26.c : + - Add GPL v3 Disclaimer + - Add new test 'procfs' (via readdir & chdir) + - Add new test 'reverse' + - Add new test 'quick' + - Add option verbose (-v) to allow warning display + - Add option morecheck (-m), only affect procfs test for now + - Add option help (-h) + - Displace usage in usage() function + - Add Changelog file (this file) + - Rewamp command line parsing in main() + - Change checkps() parameter to allow more scalability + - Minor optimization in brute(), we tried to create 300 more processes than available. + - Minor optimization : avoid to test our own PID + - Update the man page and README.txt to reflect changes. + +2010-02-01 + unhide-linux26.c : + - Threads Brute Force added + - Add needed stuff (includes, defines, ...) to eliminate compilation warning. (Thanks to J. Walles) + - Correct a typo in checkps() where fich_tmp is used in place of fich_pgid (Thanks to P. Gouin) + - Corrected several FD leaks where files or pipes are read and closed even if they have failed to open. (Thanks to W. Doekes & P. Gouin) + - Add warning messages if file or pipe fails to open (compatible with rkhunter use of unhide) (Thanks to W. Doekes & P. Gouin) + - Add warning messages if a test is skipped (compatible with rkhunter use of unhide). (Thanks to P. Gouin) + - Correct removing of leading spaces which tests one char too far for end of string in checkps(). (Thanks to P. Gouin) + - Close fd in get_max_pid(). (Thanks to P. Gouin) + - Close cmd_file in printbadpid(). (Thanks to P. Gouin) + - Add display of test name in checkallnoprocps(). (Thanks to P. Gouin) + - Close fich_processo in checksysinfo() (Thanks to W. Doekes) + - Avoid potential buffer overflow in checksysinfo() (Thanks to W. Doekes) + - Correct allpids[] initialization in brute() (Thanks to W. Doekes) + - Modify brute as modifying allpid from within the forked process may have undefined results (Linux vfork() man page) (Thanks to P. Gouin) + - Add return to main() (Thanks to W. Doekes) + - Optimizations (Thanks to P. Gouin) + +2009-08-10 (BETA) +-Improved maxpid routine (Thanks to Jan Iven) +-Improved false positives detection (Thanks to Jan Iven) +-Kill() syscall added (Thanks to Jan Iven) +-Fixed sched_getaffinity() bug (Thanks to Jan Iven) +-Some minor bug fixes + +2008-05-19 +-Fixed a race condition bug that showed false positives (Thanks to Johan Walles) +-Added manpages (Thanks to Francois Marier) + +02-11-2007 +-Minor bugfixes +-License added +-sysinfo() syscall added + +28-12-2005 +-Initial Release + diff --git a/make_tarball.sh b/make_tarball.sh new file mode 100755 index 0000000..8ecee54 --- /dev/null +++ b/make_tarball.sh @@ -0,0 +1,27 @@ +#! /bin/sh +TAR_DATE=`date +%Y%m%d` +echo $TAR_DATE +TAR_FILE="unhide-$TAR_DATE" +echo $TAR_FILE + +if [ -e "../$TAR_FILE" ]; then + echo "../$TAR_FILE already exists, do you want to delete it and continue [yN] ?" + read DEL_DIR + if [ $DEL_DIR == "Y" -o $DEL_DIR == "y" ]; then + if [ -d "../$TAR_FILE" ]; then + echo "\rm -rf ../$TAR_FILE" + else + echo "\rm -f ../$TAR_FILE" + fi + else + exit 1 + fi +else + echo "../$TAR_FILE n'existe pas" +fi +mkdir -p ../$TAR_FILE/man/es ../$TAR_FILE/man/fr +for FILE in `cat tar_list.txt`; do + cp $FILE ../$TAR_FILE/$FILE +done +tar -czvf $TAR_FILE.tgz ../$TAR_FILE +mv $TAR_FILE.tgz ../$TAR_FILE diff --git a/man/es/unhide-tcp.8 b/man/es/unhide-tcp.8 new file mode 100644 index 0000000..9a993c3 --- /dev/null +++ b/man/es/unhide-tcp.8 @@ -0,0 +1,79 @@ +.TH "UNHIDE-TCP" "8" "August 2012" "Administration commands" "" +.SH "NOMBRE" +unhide\-tcp \(em Herramienta forense para localizar puertos TCP/UDP ocultos +.SH "SYNOPSIS" +.PP +\fBunhide\-tcp [opciones]\fR +.SH "DESCRIPCIÓN" +.PP +\fBunhide\-tcp\fR es una herramienta forense capaz de identificar puertos +TCP/UDP que están a la escucha pero no aparecen listados en /sbin/ss (o alternativamente +/bin/netstat) haciendo fuerza bruta en todo el espacio de puertos TCP/UDP disponibles +.br +Nota1 : Tanto en FreeBSD como en OpenBSD el comando netstat será siempre la opción elegida +puesto que iproute2 no está disponible. Además en FreeBSD se usará sockstat en lugar de fuser + +Nota2: Si el comando iproute2 no se encuentra disponible en el sistema la opción \-n o \-s DEBE estar +entre los flags con los que es llamado unhide\-tcp +.PP +.SH "OPCIONES" +.TP +\fB\-h \-\-help\fR +Muestra la ayuda +.TP +\fB\-\-brief\fR +No muestra mensajes de error. Este es el comportamiento por defecto +.TP +\fB\-f \-\-fuser\fR +Muestra la salida del comando fuser (si se encuentra en el sistema) del puerto oculto +Para FreeBSD, en lugar de comando fuser, muestra la salida del comando sockstat del puerto oculto +.TP +\fB\-l \-\-lsof\fR +Muestra la salida del comando lsof (si se encuentra en el sistema) del puerto oculto +.TP +\fB\-n \-\-netstat\fR +Emplea /bin/netstat en vez de /sbin/ss. En sistemas con muchos puertos abiertos usar esta opción +puede provocar que el test resulte excesivamente lento +.TP +\fB\-s \-\-server\fR +Usa un método de escaneo muy rápido. En sistemas con muchos puertos abiertos este test es +cientos de veces más rápido que si se usa el comando ss y miles de veces más rápido que si se usa +el comando netstat +.TP +\fB\-o \-\-log\fR +Genera un fichero de log (unhide\-tcp\-AAAA\-MM\-DD.log) en el directorio donde se ejecuta el comando +.TP +\fB\-V \-\-version\fR +Muestra la versión y sale +.TP +\fB\-v \-\-verbose\fR +Muestra mucha información así como los mensajes de advertencia. Esta opción puede usarse varias veces +.PP +.SS "Exit status:" +.TP +0 +Si no se ha encontrado ningún puerto oculto, +.TP +4 +Si uno o varios puertos TCP ocultos son localizados, +.TP +8 +Si uno o varios puertos UDP ocultos son encontrados +.TP +12 +Si uno o varios puertos TCP y UDP ocultos son encontrados +.PP +.SH "VÉASE TAMBIÉN" +.PP +unhide (8). +.SH "AUTOR" +.PP +Este manual ha sido creado por Francois Marier francois@debian.org y Patrick Gouin. +Se concede permiso para ser copiado, distribuido y modificado bajo los términos de la licencia +GNU, versión 3 o versiones posteriores publicadas por la Free Software Foundation +.SH "LICENCIA" +License GPLv3+: GNU GPL version 3 or later . +.br +License GPLv3+: GNU GPL version 3 o posterior . +Este es software libre, vd es libre de modificar y redistribuir las modificaciones. +Este software no provee ninguna garantía . diff --git a/man/es/unhide.8 b/man/es/unhide.8 new file mode 100644 index 0000000..41f4d05 --- /dev/null +++ b/man/es/unhide.8 @@ -0,0 +1,196 @@ +.TH "UNHIDE" "8" "Marzo 2012" "Comandos de administración" "" +.SH "NOMBRE" +unhide \(em Herramienta forense para descubrir procesos ocultos +.SH "SINOPSIS" +.PP +\fBunhide\-linux\fR [\fIOPTIONS\fR] \fITEST_LIST\fR +.br +\fBunhide\-posix\fR \fIproc | sys\fR +.SH "DESCRIPCIÓN" +.PP +\fBunhide\fR es una herramienta forense para detectar procesos ocultos en sistemas Unix que hayan sido ocultados mediante rookits / módulos en el Kernel o cualquier otra técnica de ocultación. Implementa seis técnicas de detección +.PP +.SH "OPCIONES" +.PP +Opciones sólo están disponibles para \fBunhide\-linux\fR no para \fBunhide\-posix\fR. +.TP +\fB\-d\fR +Realiza una prueba doble control en test 'brute' para reducir la aparición de falsos positivos. +.TP +\fB\-f\fR +Crea un fichero de log (unhide\-linux.log) en el directorio de ejecución. +.TP +\fB\-h\fR +Muestra la ayuda +.TP +\fB\-m\fR +Realiza múltiples tests añadidos, desde la versión 2012\-03\-17, esta opción solo es válida en los tests 'procfs', 'procall', 'checkopendir' y 'checkchdir' +.br +Implica \-v +.TP +\fB\-r\fR +Emplea una versión alternativa del test sysinfo +.TP +\fB\-V\fR +Muestra la versión y sale +.TP +\fB\-v\fR +Fuerza la salida debug con los mensajes de error (se puede repetir varias veces \-vv) +.PP +.PP +.SH "TEST_LIST" +.PP +Los checks consisten en uno o mas de los siguientes tests +.br +Los tests estandar son en realidad agrupaciones de varios tests elementales +.PP +\fBTests estandar :\fR +.PP +El test \fIbrute\fR consiste en hacer fuerza bruta sobre todo el espacio de identificadores de procesos (PIDS) +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIproc\fR consiste en comparar el directorio /proc con la salida del comando /bin/ps +.PP +El test \fIprocall\fR combina los tests proc y procfs +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIprocfs\fR consiste en comparar la información obtenida por /bin/ps con los datos obtenidos al recorrer procfs +.br +Con la opción \fB\-m\fR este test realiza tests adicionales, para mas información consultar \fIcheckchdir\fR +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIquick\fR combina los tests proc, procfs y sys en una forma 'rápida' de ejecución, es hasta 20 veces mas rápido que otros test pero también puede ofrecer mas falsos positivos +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIreverse\fR consiste en verificar que todos los procesos e hilos que son vistos por /bin/ps existen realmente buscandolos en procfs y por system calls. El objetivo es averiguar si se ha modificado /bin/ps para hacer creer que existen en ejecución algunos programas que realmente no lo están +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIsys\fR consiste en comparar la información obtenida de /bin/ps contra algunas system calls +.PP +\fBTests elementales :\fR +.PP +El test \fIcheckbrute\fR consiste en hacer fuerza bruta contra todo el espacio de procesos (PIDS) del sistema +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIcheckchdir\fR consiste en comparar la información obtenida por /bin/ps y compararla haciendo chdir() en procfs +.br +Con la opción \fB\-m\fR también se comprueba que el hilo aparece en la lista "leader process" +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIcheckgetaffinity\fR consiste en comparar la información obtenida por /bin/ps con el resultado de la system call sched_getaffinity() +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIcheckgetparam\fR consiste en comparar la información obtenida por /bin/ps con el resultado de la system call sched_getparam() +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIcheckgetpgid\fR consiste en comparar la información obtenida por /bin/ps con el resultado de la system call getpgid() +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIcheckgetprio\fR consiste en comparar la información obtenida por /bin/ps con el resultado de la system call getpriority() +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIcheckRRgetinterval\fR consiste en comparar la información obtenida por /bin/ps con el resultado de la system call sched_rr_get_interval() +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIcheckgetsched\fR consiste en comparar la información obtenida por /bin/ps con el resultado de la system call sched_getscheduler() +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIcheckgetsid\fR consiste en comparar la información obtenida por /bin/ps con el resultado de la system call getsid() +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIcheckkill\fR consiste en comparar la información obtenida por /bin/ps con el resultado de la system call kill() +.br +Nota: ningún proceso es 'matado' con este test +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIchecknoprocps\fR consiste en comparar el resultado de la información obtenida usando cada una de las system calls buscando diferencias entre si. No se emplea /bin/ps o /proc +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIcheckopendir\fR consiste en comparar la información obtenida por /bin/ps con el resultado de hacer opendir() sobre procfs +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIcheckproc\fR consiste en comparar la información obtenida por /bin/ps con los datos de /proc +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIcheckquick\fR combina los tests proc, procfs y sys en una forma 'rápida' de ejecución, es hasta 20 veces mas rápido que otros test pero también puede ofrecer mas falsos positivos +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIcheckreaddir\fR consiste en comparar la información obtenida por /bin/ps con el resultado de hacer readdir() en /proc y /proc/pid/task +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIcheckreverse\fR consiste en verificar que todos los procesos e hilos que son vistos por /bin/ps existen realmente buscandolos en procfs y por system calls. El objetivo es averiguar si se ha modificado /bin/ps para hacer creer que existen en ejecución algunos programas que realmente no lo están +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIchecksysinfo\fR consiste en comparar el número de procesos contabilizados por /bin/ps contra el número de procesos que indica la syscall sysinfo() +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.PP +El test \fIchecksysinfo2\fR es una versión alternativa de checksysinfo, se presupone que funciona mejor en kernels parcheados para RT, preempt o latency y también con kernels que no usen el planificador estandar +.br +Este test está implicito cuando se ejecuta con la opción \fB\-r\fR +.br +Esta técnica solo está disponible con la versión unhide\-linux. +.SS "Valor regresado:" +.TP +0 +si todo OK, +.TP +1 +si se ha localizado un proceso/hilo oculto o falso +.PP +.SH "EJEMPLOS" +.TP +Un test excepcionalmente rápido : +unhide quick +.TP +Test rápido : +unhide quick reverse +.TP +Estándar test : +unhide sys proc +.TP +Un test completo : +unhide \-m \-d sys procall brute reverse +.SH "FALLOS" +.PP +Puedes reportar fallos de \fBunhide\fR en el 'bug tracker' de Sourceforge (http://sourceforge.net/projects/unhide/) +.br +Con las últimas versiones de kernel de Linux (> 2.6.33), el test sysinfo puede reportar falsos positivos. +Puede ser debido a la optimización en el scheduler, el uso de cgroup o incluso el uso de systemd. +El uso del patch PREEMPT\-RT amplifica la probabilidad de que se de ese problema. +Esto es actualmente objeto de investigación. +.SH "VÉASE TAMBIÉN" +.PP +unhide\-tcp (8). +.SH "AUTOR" +.PP +Este manual ha sido creado por Francois Marier francois@debian.org y Patrick Gouin. +Se concede permiso para ser copiado, distribuido y modificado bajo los términos de la licencia +GNU, versión 3 o versiones posteriores publicadas por la Free Software Foundation + +.SH "LICENSE" +License GPLv3+: GNU GPL version 3 o posterior . +.br +Este es software libre, vd es libre de modificar y redistribuir las modificaciones. +Este software no provee ninguna garantía . diff --git a/man/fr/unhide-tcp.8 b/man/fr/unhide-tcp.8 new file mode 100644 index 0000000..ff05a05 --- /dev/null +++ b/man/fr/unhide-tcp.8 @@ -0,0 +1,79 @@ +.TH "UNHIDE-TCP" "8" "Août 2012" "Commandes d'administration" +.SH "NOM" +unhide-tcp \(em outil d'investigation post-mortem pour trouver des ports TCP/UDP cachés +.SH "SYNOPSIS" +.PP +\fBunhide-tcp [options]\fR +.SH "DESCRIPTION" +.PP +\fBunhide-tcp\fR est un outil d'investigation post-mortem qui identifie les ports +TCP/UDP qui sont à l'écoute mais qui ne sont pas listés par /sbin/ss (ou +alternativement par /bin/netstat) en utilisant la force brute : ouverture de +tous les ports TCP/UDP existants. +.br +Note1 : sur FreeBSD et OPENBSD, netstat est systématiquement utilisé iproute2 n'existant pas +sur ces systèmes. De plus sur FreeBSD, sockstat est utilisé à la place de fuser. +Note2 : si iproute2 n'est pas installé sur le système, une des option -n ou - s +DOIT être utilisée sur la ligne de commande. +.PP +.SH "OPTIONS" +.TP +\fB\-h\fR +Affiche l'aide. +.TP +\fB\--brief\fR +N'affiche pas les messages d'avertissement, c'est le comportement par défaut. +.TP +\fB\-f --fuser\fR +Affiche la sortie de fuser (si elle est disponible) pour les ports cachés. +Sur FreeBSD, affiche, à la place, la sortie de sockstat pour les ports cachés. +.TP +\fB\-l --lsof\fR +Affiche la sortie de lsof (si elle est disponible) pour les ports cachés. +.TP +\fB\-n --netstat\fR +Utilise /bin/netstat au lieu de /sbin/ss. Sur les systèmes où un grand nombre de ports sont ouverts, +cela peut ralentir le test de façon dramatique. +.TP +\fB\-o --log\fR +Enregistre les sorties dans un fichier de log (unhide-tcp-AAAA-MM-JJ.log) situé dans le répertoire courant. +.TP +\fB\-s --server\fR +Utilise une stratégie d'analyse très rapide. Sur un système avec un très grand nombre de ports ouverts, +c'est des centaines de fois plus rapide que la méthode ss et des dizaines de milliers de fois plus rapide que +la méthode netstat. +.TP +\fB\-V --version\fR +Affiche la version et sort +.TP +\fB\-v --verbose\fR +Affichage prolixe, affiche les message d'avertissement (par défaut : ne pas afficher). +.PP +.SS "Exit status:" +.TP +0 +si aucun port caché n'est trouvé, +.TP +4 +si un ou plusieurs port(s) TCP caché(s) est(sont) trouvé(s), +.TP +8 +si un ou plusieurs port(s) UDP caché(s) est(sont) trouvé(s), +.TP +12 +si des ports TCP et UDP cachés sont trouvés. +.PP +.SH "VOIR AUSSI" +.PP +unhide (8). +.SH "AUTEUR" +.PP +Cette page de manuel a été écrite par Patrick Gouin (patrick-g@users.sourceforge.net). +Permission vous est donnée de copier, distribuer et/ou modifier ce document sous +les termes de la GNU General Public License, Version 3 ou toute +version ultérieure publiée par la Free Software Foundation. +.SH LICENCE +Licence GPLv3: GNU GPL version 3 ou version ultérieure . +.br +Ce logiciel est libre : vous êtes libre de le modifier et le redistribuer. +Il n'y a AUCUNE GARANTIE, dans les limites permises par la loi. diff --git a/man/fr/unhide.8 b/man/fr/unhide.8 new file mode 100644 index 0000000..83cdd6c --- /dev/null +++ b/man/fr/unhide.8 @@ -0,0 +1,239 @@ +.TH "unhide" "8" "Mars 2012" "Commandes d'administration" +.SH "NOM" +unhide \(em outil d'investigation post\-mortem pour trouver des processus cachés +.SH "SYNOPSIS" +.PP +\fBunhide\-linux\fR [\fIOPTIONS\fR] \fITEST_LIST\fR +.br +\fBunhide\-posix\fR \fIproc | sys\fR +.SH "DESCRIPTION" +.PP +\fBunhide\fR est un outil d'investigation pour trouver les processus cachés par +des rootkits, des modules du noyau Linux ou par d'autres techniques. Il +détecte les processus cachés en utilisant six techniques principales. +.PP +.SH "OPTIONS" +.PP +Les options sont uniquement disponibles pour \fBunhide-linux\fR pas pour \fBunhide-posix\fR. +.TP +\fB \-d\fR +Effectue un double contrôle dans le test 'brute' pour diminuer l'occurence des faux positifs. +.TP +\fB \-f\fR +Enregistre les sorties dans un fichier de log (unhide-linux.log) situé dans le répertoire courant. +.TP +\fB \-h\fR +Affichage de l'aide. +.TP +\fB \-m\fR +Exécute des contrôles supplémentaires. Pour la version 2012\-03\-17, cette option n'a +d''effet pour les tests procfs, procall, checkopendir et checkchdir. +.br +Elle implique l'option \-v. +.TP +\fB \-r\fR +Utilise une version alternative du test sysinfo lors du lancement d'un test standard. +.TP +\fB \-V\fR +Affiche la version et sort. +.TP +\fB \-v\fR +Affichage prolixe, affiche les message d'avertissement (par défaut : ne pas afficher). +Cette option peut être répétée plus d'une fois. +.PP +.PP +.SH "TEST_LIST" +.PP +Les vérifications à faire consiste en un ou plusieurs des tests suivants. +.br +Les tests standard sont l'agrégation d'un ou plusieurs test(s) élémentaire(s). +.PP +\fBTests Standards :\fR +.PP +La technique \fIbrute\fR consiste en un scan de tous les ID de processus par +force brute. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIproc\fR consiste à comparer le contenu de /proc avec la +sortie de /bin/ps. +.PP +La technique \fIprocall\fR combine les tests proc et procfs. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIprocfs\fR consiste à comparer les informations recueillies par +le parcours de l'arborescence du système de fichiers procfs avec les informations +issues de /bin/ps +.br +Avec l'option \fB\-m\fR, ce test effectue des contrôles plus approfondis, voir le +test \fIcheckchdir\fR. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIquick\fR combine les techniques proc, procfs et sys d'une façon rapide. +Elle est environ 20 fois plus rapide, mais peut donner davantage de faux positifs. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIreverse\fR consiste à vérifier que tous les threads vus par /bin/ps +sont également vus dans le procfs et par les appels système. C'est une recherche +inversée. Elle est destiné à vérifier qu'un rootkit n'a pas tué un outil de sécurité +(IDS ou autre) et modifié /bin/ps pour lui faire afficher un faux processus à la place. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIsys\fR consiste à comparer les résultats des appels des fonctions systèmes +avec les informations recueillies à partir de /bin/ps. +.PP +\fBTests Elémentaires :\fR +.PP +La technique \fIcheckbrute\fR en un scan de tous les ID de processus par +force brute. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIcheckchdir\fR consiste à comparer les informations recueillies en +parcourant le système de fichiers procfs à l'aide de la fonction chdir() avec les informations +obtenues avec /bin/ps. +.br +Avec l'option \fB\-m\fR, elle vérifie également que les threads apparaîssent dans la +liste des threads de leur processus principal +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIcheckgetaffinity\fR consiste à comparer les résultat de +l'appel à la fonction système sched_getaffinity() avec les informations recueillies +à partir de /bin/ps. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIcheckgetparam\fR consiste à comparer les résultats de +l'appel à la fonction système sched_getparam() avec les informations +recueillies à partir de /bin/ps. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIcheckgetpgid\fR consiste à comparer les résultats de l'appel à la +fonction système getpgid() avec les informations recueillies à partir de /bin/ps. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIcheckgetprio\fR consiste à comparer les résultats de l'appel à la +fonction système getpriority() avec les informations recueillies à partir de /bin/ps. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIcheckRRgetinterval\fR consiste à comparer les résultats de l'appel +à la fonction système sched_rr_get_interval() avec les informations +recueillies à partir de /bin/ps. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIcheckgetsched\fR consiste à comparer les résultats de l'appel à la +fonction système sched_getscheduler() avec les informations recueillies à partir de /bin/ps. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIcheckgetsid\fR consiste à comparer les résultats de l'appel à la +fonction système getsid() avec les informations recueillies à partir de /bin/ps. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIcheckkill\fR consiste à comparer les résultats de l'appel à la +fonction système kill() avec les informations recueillies à partir de /bin/ps. +.br +Note: aucun processus n'est réellement tué par ce test. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIchecknoprocps\fR consiste à comparer les résultats des appels +de chacune des fonctions du système entre eux. Aucune comparaison n'est faite avec +le contenu de /proc ou la sortie de /bin/ps. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIcheckopendir\fR consiste à comparer les informations recueillies en +parcourant le système de fichiers procfs à l'aide de la fonction opendir() avec les informations +recueillies à partir de /bin/ps. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIcheckproc\fR consiste à comparer le contenu de /proc avec la +sortie de /bin/ps. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIcheckquick\fR combine les technique proc, procfs et sys d'une façon +rapide. Il est environ 20 fois plus rapide, mais peut donner davantage de faux positifs. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIcheckreaddir\fR consiste à comparer les informations recueillies en +parcourant le système de fichiers procfs (/proc et /proc/PID/task) à l'aide de la fonction +readdir() avec les informations recueillies à partir de /bin/ps. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIcheckreverse\fR consiste à vérifier que tous les threads +vus par ps sont également vus dans procfs et par les appels système. Il est destiné +à vérifier qu'un rootkit n'a pas tué un outil de sécurité (IDS ou autre) et +modifié /bin/ps pour lui faire afficher un faux processus à la place. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIchecksysinfo\fR consiste à comparer le nombre des processus obtenu +à partir de l'appel système sysinfo() avec le nombre de processus vu par /bin/ps. +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.PP +La technique \fIchecksysinfo2\fR est une version alternative du test checksysinfo. +Il peut (ou pas) fonctionner mieux sur un noyau modifié pour le temps réel, la préemption, +la latence basse ou un noyau qui n'utilise pas le scheduler standard. +.br +Il est invoqué par les tests standard lorsqu'on utilise l'option \fB\-r\fR +.br +Cette technique n'est disponible qu'avec la version unhide\-linux. +.SS "Code de retour" +.TP +0 +si OK, +.TP +1 +si un thread caché ou faux est trouvé. +.PP +.SH "EXEMPLES" +.TP +Test le plus rapide : +unhide quick +.TP +Test rapide : +unhide quick reverse +.TP +Test standard : +unhide sys proc +.TP +Test le plus complet : +unhide -m -d sys procall brute reverse +.SH "BUGS" +.PP +Rapportez les bugs de \fBunhide\fR sur le bug tracker de sourceforge (http://sourceforge.net/projects/unhide/) +.br +Avec les versions récentes du noyau Linux (> 2.6.33), le test sysinfo peut indiquer de faux positifs. +Ça peut être dû à l'optimisation dans le scheduleur, l'utilisation des cgroup ou même l'utilisation de systemd. +L'utilisation du patch PREEMPT-RT amplifie l'apparition du problème. +Ce problème est en cours d'investigation. +.SH "VOIR AUSSI" +.PP +unhide\-tcp (8). +.SH "AUTEUR" +.PP +Cette page de manuel a été écrite par Patrick Gouin (patrick\-g@users.sourceforge.net). +Permission vous est donnée de copier, distribuer et/ou modifier ce document sous +les termes de la GNU General Public License, Version 3 ou toute +version ultérieure publiée par la Free Software Foundation. +.SH "LICENCE" +Licence GPLv3: GNU GPL version 3 ou version ultérieure . +.br +Ce logiciel est libre : vous êtes libre de le modifier et le redistribuer. +Il n'y a AUCUNE GARANTIE, dans les limites permises par la loi. diff --git a/man/unhide-tcp.8 b/man/unhide-tcp.8 new file mode 100644 index 0000000..899334f --- /dev/null +++ b/man/unhide-tcp.8 @@ -0,0 +1,80 @@ +.TH "UNHIDE-TCP" "8" "August 2012" "Administration commands" +.SH "NAME" +unhide-tcp \(em forensic tool to find hidden TCP/UDP ports +.SH "SYNOPSIS" +.PP +\fBunhide-tcp [options]\fR +.SH "DESCRIPTION" +.PP +\fBunhide-tcp\fR is a forensic tool that identifies TCP/UDP +ports that are listening but are not listed by /sbin/ss (or +alternatively by /bin/netstat) through brute forcing of all +TCP/UDP ports available. +.br +Note1 : On FreeBSD ans OpenBSD, netstat is allways used as iproute2 doesn't exist +on these OS. In addition, on FreeBSD, sockstat is used instead of fuser. +Note2 : If iproute2 is not available on the system, option -n or -s SHOULD be +given on the command line. +.PP +.SH "OPTIONS" +.TP +\fB\-h --help\fR +Display help +.TP +\fB\--brief\fR +Don't display warning messages, that's the default behavior. +.TP +\fB\-f --fuser\fR +Display fuser output (if available) for the hidden port +On FreeBSD, instead of fuser command, displays the output of the sockstat command for the hidden port. +.TP +\fB\-l --lsof\fR +Display lsof output (if available) for the hidden port +.TP +\fB\-n --netstat\fR +Use /bin/netstat instead of /sbin/ss. On system with many opened ports, this can +slow down the test dramatically. +.TP +\fB\-s --server\fR +Use a very quick strategy of scanning. On system with a lot of opened ports, +it is hundreds times faster than ss method and ten thousands times faster than +netstat method. +.TP +\fB\-o --log\fR +Write a log file (unhide-tcp-AAAA-MM-DD.log) in the current directory. +.TP +\fB\-V --version\fR +Show version and exit +.TP +\fB\-v --verbose\fR +Be verbose, display warning message (default : don't display). +This option may be repeated more than once. +.PP +.SS "Exit status:" +.TP +0 +if no hidden port is found, +.TP +4 +if one or more hidden TCP port(s) is(are) found, +.TP +8 +if one or more hidden UDP port(s) is(are) found, +.TP +12 +if one or more hidden TCP and UDP ports are found. +.PP +.SH "SEE ALSO" +.PP +unhide (8). +.SH "AUTHOR" +.PP +This manual page was written by Francois Marier francois@debian.org and Patrick Gouin. +Permission is granted to copy, distribute and/or modify this document under +the terms of the GNU General Public License, Version 3 or any +later version published by the Free Software Foundation. +.SH LICENSE +License GPLv3+: GNU GPL version 3 or later . +.br +This is free software: you are free to change and redistribute it. +There is NO WARRANTY, to the extent permitted by law. diff --git a/man/unhide.8 b/man/unhide.8 new file mode 100644 index 0000000..31f8ed4 --- /dev/null +++ b/man/unhide.8 @@ -0,0 +1,241 @@ +.TH "UNHIDE" "8" "March 2012" "Administration commands" +.SH "NAME" +unhide \(em forensic tool to find hidden processes +.SH "SYNOPSIS" +.PP +\fBunhide\fR [\fIOPTIONS\fR] \fITEST_LIST\fR +.br +\fBunhide\-posix\fR \fIproc | sys\fR +.SH "DESCRIPTION" +.PP +\fBunhide\fR is a forensic tool to find processes hidden by +rootkits, Linux kernel modules or by other techniques. It +detects hidden processes using six techniques. +.PP +.SH "OPTIONS" +.PP +Options are only available for \fBunhide-linux\fR not for \fBunhide-posix\fR. +.TP +\fB\-d\fR +Do a double check in brute test to avoid false positive. +.TP +\fB\-f\fR +Write a log file (unhide-linux.log) in the current directory. +.TP +\fB\-h\fR +Display help +.TP +\fB\-m\fR +Do more checks. As of 2012\-03\-17 version, this option has only +effect for the procfs, procall, checkopendir and checkchdir tests. +.br +Implies -v +.TP +\fB\-r\fR +Use alternate version of sysinfo check in standard tests +.TP +\fB\-V\fR +Show version and exit +.TP +\fB\-v\fR +Be verbose, display warning message (default : don't display). +This option may be repeated more than once. +.PP +.PP +.SH "TEST_LIST" +.PP +The checks to do consist of one or more of the following tests. +.br +The standard tests are the aggregation of one or more elementary test(s). +.PP +\fBStandard tests :\fR +.PP +The \fIbrute\fR technique consists of bruteforcing the all +process IDs. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIproc\fR technique consists of comparing /proc with the +output of /bin/ps. +.PP +The \fIprocall\fR technique combinates proc and procfs tests. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIprocfs\fR technique consists of comparing information +gathered from /bin/ps with information gathered by walking in the procfs. +.br +With \fB-m\fR option, this test makes more checks, see \fIcheckchdir\fR test. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIquick\fR technique combines the proc, procfs and sys techniques in a +quick way. It's about 20 times faster but may give more false positives. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIreverse\fR technique consists of verifying that all threads +seen by ps are also seen in procfs and by system calls. It is intended to +verify that a rootkit has not killed a security tool (IDS or other) and +make ps showing a fake process instead. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIsys\fR technique consists of comparing information +gathered from /bin/ps with information gathered from system +calls. +.PP +\fBElementary tests :\fR +.PP +The \fIcheckbrute\fR technique consists of bruteforcing the all +process IDs. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIcheckchdir\fR technique consists of comparing information +gathered from /bin/ps with information gathered by making chdir() in the procfs. +.br +With the \fB-m\fR option, it also verify that the thread appears in its +"leader process" threads list. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIcheckgetaffinity\fR technique consists of comparing information +gathered from /bin/ps with the result of call to the sched_getaffinity() +system function. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIcheckgetparam\fR technique consists of comparing information +gathered from /bin/ps with the result of call to the sched_getparam() +system function. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIcheckgetpgid\fR technique consists of comparing information +gathered from /bin/ps with the result of call to the getpgid() +system function. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIcheckgetprio\fR technique consists of comparing information +gathered from /bin/ps with the result of call to the getpriority() +system function. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIcheckRRgetinterval\fR technique consists of comparing information +gathered from /bin/ps with the result of call to the sched_rr_get_interval() +system function. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIcheckgetsched\fR technique consists of comparing information +gathered from /bin/ps with the result of call to the sched_getscheduler() +system function. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIcheckgetsid\fR technique consists of comparing information +gathered from /bin/ps with the result of call to the getsid() +system function. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIcheckkill\fR technique consists of comparing information +gathered from /bin/ps with the result of call to the kill() +system function. +.br +Note : no process is really killed by this test. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIchecknoprocps\fR technique consists of comparing the result of the call +to each of the system functions. No comparison is done against /proc or the +output of ps. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIcheckopendir\fR technique consists of comparing information +gathered from /bin/ps with information gathered by making opendir() in the procfs. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIcheckproc\fR technique consists of comparing /proc with the +output of /bin/ps. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIcheckquick\fR technique combines the proc, procfs and sys techniques in a +quick way. It's about 20 times faster but may give more false positives. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIcheckreaddir\fR technique consists of comparing information +gathered from /bin/ps with information gathered by making readdir() in /proc and +/proc/pid/task. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIcheckreverse\fR technique consists of verifying that all threads +seen by ps are also seen in procfs and by system calls. It is intended to +verify that a rootkit has not killed a security tool (IDS or other) and +make ps showing a fake process instead. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIchecksysinfo\fR technique consists of comparing the number of process +seen by /bin/ps with information obtained from sysinfo() system call. +.br +This technique is only available with version unhide\-linux. +.PP +The \fIchecksysinfo2\fR technique is an alternate version of checksysinfo test. +It might (or not) work better on kernel patched for RT, preempt or latency and +with kernel that don't use the standard scheduler. +.br +It's also invoked by standard tests when using the \fB-r\fR option +.br +This technique is only available with version unhide\-linux. +.SS "Exit status:" +.TP +0 +if OK, +.TP +1 +if a hidden or fake thread is found. +.PP +.SH "EXAMPLES" +.TP +Quicker test: +unhide quick +.TP +Quick test: +unhide quick reverse +.TP +Standard test: +unhide sys proc +.TP +Deeper test: +unhide -m -d sys procall brute reverse +.SH "BUGS" +.PP +Report \fBunhide\fR bugs on the bug tracker on sourceforge (http://sourceforge.net/projects/unhide/) +.br +With recent versions of Linux kernel (> 2.6.33), the sysinfo test may report false positives. +It may be due to optimization in the scheduler, the use of cgroup or even the use of systemd. +The use of the PREEMPT-RT patch amplifies the occurence of the problem. +This is currently under investigation. +.SH "SEE ALSO" +.PP +unhide-tcp (8). +.SH "AUTHOR" +.PP +This manual page was written by Francois Marier francois@debian.org and Patrick Gouin. +Permission is granted to copy, distribute and/or modify this document under +the terms of the GNU General Public License, Version 3 or any +later version published by the Free Software Foundation. +.SH LICENSE +License GPLv3+: GNU GPL version 3 or later . +.br +This is free software: you are free to change and redistribute it. +There is NO WARRANTY, to the extent permitted by law. diff --git a/sanity-tcp.sh b/sanity-tcp.sh new file mode 100755 index 0000000..c9f30d0 --- /dev/null +++ b/sanity-tcp.sh @@ -0,0 +1,93 @@ +#!/bin/sh + +# sanity.sh -- a growing testsuite for unhide-tcp. +# +# Copyright (C) 2010 Patrick Gouin. +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . +# +# Original Author: Patrick Gouin +# BSD portability: Nikos Ntarmos + +if [ "x`/usr/bin/env uname`" == "xLinux" ]; then + ONFREEBSD=0 + CHECKER=ss +else + ONFREEBSD=1 + CHECKER=netstat +fi + +# remove pre-existing local ss +rm -f ./$CHECKER + +#test 0 +# Don't call CHECKER : let all ports appear hidden +cat <./$CHECKER +#!/bin/sh + +false +EOF +chmod 754 ./$CHECKER +PATH=.:$PATH ./unhide-tcp -fl +# PATH=.:$PATH ./unhide-tcp +#PATH=.:$PATH ./unhide-tcp-double_check + +# remove pre-existing local $CHECKER +rm -f ./$CHECKER + +#test 1 +# Call $CHECKER : let cups port appears hidden +cat <./$CHECKER +#!/bin/sh + +set -e + +# echo "Le 1er paramètre est : \$1" >&2 +# echo "Le 2ème paramètre est : \$2" >&2 +# echo "Le 3ème paramètre est : \$3" >&2 +# echo "Le 4ème paramètre est : \$4" >&2 + +if [ $ONFREEBSD -eq 1 ] +then + /usr/bin/netstat \$@ | grep -v 631 + exit +elif [ "\$4" != ":631" ] +then + # appelle le véritable ss + /sbin/ss \$@ +else + echo "Le 4ème paramètre est : \$4" >&2 +fi + +EOF +chmod 754 ./$CHECKER +PATH=.:$PATH ./unhide-tcp -fl +# PATH=.:$PATH ./unhide-tcp-double_check -fl + +# remove pre-existing local CHECKER +#rm -f ./$CHECKER diff --git a/sanity.sh b/sanity.sh new file mode 100755 index 0000000..50a5a5a --- /dev/null +++ b/sanity.sh @@ -0,0 +1,122 @@ +#! /bin/sh + +# sanity.sh -- a growing testsuite for unhide. +# +# Copyright (C) 2010 Patrick Gouin. +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . +# +# Original Author: Patrick Gouin + +# remove pre-existing local ps +rm -f ./ps + +#test 0 +# Call ps, but add a faked process. +cat <./ps +#! /bin/bash + +/bin/ps "\$@" +echo 65535 my_false_proc +EOF +chmod 754 ./ps +PATH=.:$PATH ./unhide-linux -v checksysinfo checksysinfo2 + +# remove pre-existing local ps +rm -f ./ps +# test2 +# Don't call ps : let all processes appear hidden +cat <./ps +#! /bin/bash + +false +EOF +chmod 754 ./ps +PATH=.:$PATH ./unhide-linux procall + +# remove pre-existing local ps +rm -f ./ps + +# test 1 +# Call ps, but hide the last line of output +cat <