Add proxy rule: Base64 Encoded URL In Web Request#6106
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Welcome @Usurper-Vladimir 👋
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Summary of the Pull Request
Adds a new proxy rule that detects base64-encoded
http:///https://strings embedded in request URIs (e.g. query parameters). This technique is used by phishing kits and open-redirect / C2 staging pages to smuggle a destination URL past naive domain/URL blocklists, since the payload is only readable after decoding. The rule covers all three base64 byte-alignments (offset mod 3) for each scheme, so the encoded URL is matched regardless of its position within the surrounding parameter.Changelog
new: Base64 Encoded URL In Web Request
Example Log Event
N/A - new detection rule, not a false positive fix.
Fixed Issues
N/A
SigmaHQ Rule Creation Conventions