alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed SnipBot CnC Domain (cethernet .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".cethernet.com"; endswith; fast_pattern; reference:url,unit42.paloaltonetworks.com/snipbot-romcom-malware-variant/; classtype:command-and-control; sid:2056141; rev:2; metadata:attack_target Client_Endpoint, created_at 2024_09_24, deployment Perimeter, deprecation_reason Age, malware_family SnipBot, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_05_14, reviewed_at 2025_05_14, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)