alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed TA444 Domain in TLS SNI"; flow:established,to_server; tls.sni; dotprefix; content:".commoncome.site"; endswith; fast_pattern; classtype:trojan-activity; sid:2047747; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_08_24, deployment Perimeter, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag TA444, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_24, reviewed_at 2024_01_26, former_sid 2855178, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)