Rule History

SID: 2030623 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 1 • Jul 30, 2020, 12:00 PM

Message:

ET USER_AGENTS Suspicious User-Agent (firefox)

Rule:

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious User-Agent (firefox)"; flow:established,to_server; http.user_agent; content:"firefox"; bsize:7; fast_pattern; reference:url,unit42.paloaltonetworks.com/oilrig-novel-c2-channel-steganography/; classtype:trojan-activity; sid:2030623; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_07_30, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_07_30;)

Created:

Jul 30, 2020, 12:00 PM

Updated:

Jul 30, 2020, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Sep 17, 2025, 9:34 PM

Filename:

rules/emerging-user_agents.rules