Versions (3)
Version DetailsCurrent
Rev: 1 • Jul 13, 2023, 12:00 PMET INFO Observed URL Shortening Service Domain (zws .im in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed URL Shortening Service Domain (zws .im in TLS SNI)"; flow:established,to_server; tls.sni; bsize:6; content:"zws.im"; fast_pattern; classtype:misc-activity; sid:2046819; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_07_13, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_07_13, reviewed_at 2024_02_13;)
Jul 13, 2023, 12:00 PM
Jul 13, 2023, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 20, 2025, 9:35 PM
rules/emerging-info.rules