Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed URL Shortening Service Domain (s .id in TLS SNI)"; flow:established,to_server; tls.sni; content:"s.id"; bsize:4; fast_pattern; classtype:misc-activity; sid:2034858; rev:2; metadata:attack_target Client_Endpoint, created_at 2021_12_31, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_05, reviewed_at 2024_10_14;)