Rule History

SID: 2025456 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 3 • Mar 27, 2018, 12:00 PM

Message:

ET USER_AGENTS Suspicious User-Agent (=Mozilla)

Rule:

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious User-Agent (=Mozilla)"; flow:established,to_server; http.header; content:"User-Agent|3a|=Mozilla/5"; fast_pattern; classtype:trojan-activity; sid:2025456; rev:3; metadata:affected_product Web_Browsers, attack_target Client_and_Server, created_at 2018_03_27, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_25;)

Created:

Mar 27, 2018, 12:00 PM

Updated:

Aug 25, 2020, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Sep 29, 2025, 9:34 PM

Filename:

rules/emerging-user_agents.rules