Versions (2)
Version DetailsCurrent
Rev: 1 • Oct 27, 2025, 12:00 PMET PHISHING Observed UNK_SmudgedSerpent Domain (healthcrescent .com in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING Observed UNK_SmudgedSerpent Domain (healthcrescent .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".healthcrescent.com"; endswith; fast_pattern; classtype:trojan-activity; sid:2065519; rev:1; metadata:attack_target Client_Endpoint, created_at 2025_10_27, deployment Perimeter, confidence High, signature_severity Major, tag UNK_SmudgedSerpent, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_27;)
Oct 27, 2025, 12:00 PM
Oct 27, 2025, 12:00 PM
Oct 27, 2025, 10:34 PM
Oct 28, 2025, 8:34 PM
rules/emerging-phishing.rules