Versions (4)
Version DetailsCurrent
Rev: 1 • May 10, 2023, 12:00 PMET INFO URL Shortener (s .yam .com) in TLS SNI
alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO URL Shortener (s .yam .com) in TLS SNI"; flow:established,to_client; tls.cert_subject; content:"s.yam.com"; fast_pattern; pcre:"/CN=(?:[^\r\n]+?\.)?s\.yam\.com(?!\.)/"; classtype:misc-activity; sid:2045632; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_05_10, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_10;)
May 10, 2023, 12:00 PM
May 10, 2023, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 26, 2025, 9:34 PM
rules/emerging-info.rules