Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed MaskGramStealer Domain (morozmyau-658 .cfd in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".morozmyau-658.cfd"; endswith; fast_pattern; classtype:trojan-activity; sid:2066635; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_01_08, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_01_08;)