Rule History

SID: 2012757 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 7 • Apr 30, 2011, 12:00 PM

Message:

ET USER_AGENTS suspicious user agent string (CholTBAgent)

Rule:

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS suspicious user agent string (CholTBAgent)"; flow:established,to_server; http.user_agent; content:"CholTBAgent"; startswith; threshold:type limit, count 2, seconds 40, track by_src; classtype:trojan-activity; sid:2012757; rev:7; metadata:created_at 2011_04_30, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;)

Created:

Apr 30, 2011, 12:00 PM

Updated:

Mar 12, 2024, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Oct 8, 2025, 9:38 PM

Filename:

rules/emerging-user_agents.rules