Rule History

SID: 2043026 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 2 • Dec 28, 2022, 12:00 PM

Message:

ET HUNTING Suspicious Empty Accept-Encoding Header

Rule:

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Suspicious Empty Accept-Encoding Header"; flow:established,to_server; http.header; content:"Accept-Encoding|3a 20 0d 0a|"; fast_pattern; nocase; classtype:unknown; sid:2043026; rev:2; metadata:created_at 2022_12_28, deployment Perimeter, performance_impact Moderate, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_02;)

Created:

Dec 28, 2022, 12:00 PM

Updated:

May 2, 2023, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Aug 27, 2025, 9:35 PM

Filename:

rules/emerging-hunting.rules