Versions (5)
Version DetailsCurrent
Rev: 1 • Aug 29, 2022, 12:00 PMET INFO Observed URL Shortening Service Domain (shrtcnl .com in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed URL Shortening Service Domain (shrtcnl .com in TLS SNI)"; flow:established,to_server; tls.sni; content:"shrtcnl.com"; bsize:11; fast_pattern; classtype:misc-activity; sid:2038661; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_08_29, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_29, reviewed_at 2024_10_08;)
Aug 29, 2022, 12:00 PM
Aug 29, 2022, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 1, 2025, 8:35 PM
rules/emerging-info.rules