TGI HUNT HTTP/1.0 and Transfer-Encoding Header (possible evasion)

SID: 2610310Rev: 111 views
History
Sourcetgreen/hunting
CreatedMarch 19, 2025
UpdatedMarch 19, 2025
Classificationbad-unknown
alert http any any -> any any (msg:"TGI HUNT HTTP/1.0 and Transfer-Encoding Header (possible evasion)"; flow:established,to_server; content:"Transfer-Encoding|3a 20|"; http_header; fast_pattern; content:"HTTP/1.0"; depth:8; reference:url,noxxi.de/research/http-evader-explained-3-chunked.html; threshold:type limit, track by_src, seconds 60, count 1; classtype:bad-unknown; sid:2610310; rev:1;)

References

urlnoxxi.de/research/http-evader-explained-3-chunked.html

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