Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING Observed VENOM PhaaS Domain (apl365 .sbs in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".apl365.sbs"; endswith; fast_pattern; reference:url,abnormal.ai/blog/venom-phishing-campaign-mfa-credential-theft; classtype:social-engineering; sid:2068779; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_04_15, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_04_15;)