Rule History

SID: 2028571 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 3 • Sep 12, 2019, 12:00 PM

Message:

ET USER_AGENTS Observed Suspicious UA (Absent)

Rule:

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Observed Suspicious UA (Absent)"; flow:established,to_server; http.user_agent; content:"Absent"; depth:6; endswith; classtype:bad-unknown; sid:2028571; rev:3; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2019_09_12, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2020_09_17;)

Created:

Sep 12, 2019, 12:00 PM

Updated:

Sep 17, 2020, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-user_agents.rules