Rule History

SID: 2052166 • Source: et/open

Versions (2)

Version DetailsCurrent

Rev: 1 • Apr 18, 2024, 12:00 PM

Message:

ET INFO Observed URL Shortening Service Domain (trimmer .to in TLS SNI)

Rule:

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed URL Shortening Service Domain (trimmer .to in TLS SNI)"; flow:established,to_server; tls.sni; bsize:10; content:"trimmer.to"; fast_pattern; classtype:misc-activity; sid:2052166; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_04_18, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_18;)

Created:

Apr 18, 2024, 12:00 PM

Updated:

Apr 18, 2024, 12:00 PM

DB Created:

Apr 18, 2024, 10:00 PM

DB Updated:

Aug 12, 2025, 9:34 PM

Filename:

rules/emerging-info.rules