Can't parse resources in a resource-only PE files

[justanotheranonymoususer]

Sample file:
shell32.zip

Sample script:

import sys
import pefile

def list_resource_types(dll_path):
    try:
        pe = pefile.PE(dll_path)
        
        if hasattr(pe, 'DIRECTORY_ENTRY_RESOURCE'):
            resource_types = []
            for entry in pe.DIRECTORY_ENTRY_RESOURCE.entries:
                if entry.name is not None:
                    resource_types.append(entry.name)
                else:
                    resource_types.append(f"Type {entry.id}")
            
            print(f"Resource types in {dll_path}:")
            for rt in resource_types:
                print(f"  - {rt}")
        else:
            print(f"No resources found in {dll_path}")
            
    except Exception as e:
        print(f"Error: {e}")

dll_path = sys.argv[1]
list_resource_types(dll_path)

Execution:

> .\list.py ".\shell32.dll"
No resources found in .\shell32.dll

> .\list.py C:\Windows\System32\shell32.dll
Resource types in C:\Windows\System32\shell32.dll:
  - MUI
  - TYPELIB
  - Type 16
  - Type 24

[AloXado320]

Seems like those use another entry point to load resources, since another check does show it's there, but it needs manual parsing to show the types properly:
https://gist.github.com/AloXado320/23435af079bff1c476849dd04782ec7c

> .\pe_res_list.py .\shell32.dll
Resource types in .\shell32.dll (manual parse):
  - Type 3
  - Type 14

> .\pe_res_list.py C:\Windows\System32\shell32.dll
Resource types in C:\Windows\System32\shell32.dll:
  - MUI
  - TYPELIB
  - Type 16
  - Type 24

As an extra note, pefile has a bug that doesn't return it's raw offset properly (in this dll), so that has to be manually calculated as well.

[justanotheranonymoususer]

I also tried https://github.com/avast/pe_tools and it works fine for such files