Rule History

SID: 2044354 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 1 • Feb 27, 2023, 12:00 PM

Message:

ET HUNTING User-Agent with Non Standard Characters

Rule:

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING User-Agent with Non Standard Characters"; flow:established,to_server; http.user_agent; content:"|3b 3b|"; content:"|3b 3b 2f 2e|"; distance:0; fast_pattern; content:"|2e|"; endswith; classtype:bad-unknown; sid:2044354; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_02_27, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_27; target:src_ip;)

Created:

Feb 27, 2023, 12:00 PM

Updated:

Feb 27, 2023, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Aug 25, 2025, 9:35 PM

Filename:

rules/emerging-hunting.rules