alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Xworm Domain (223 .ip .ply .gg in TLS SNI)"; flow:established,to_server; tls.sni; bsize:13; content:"223.ip.ply.gg"; fast_pattern; reference:url,ti.qianxin.com/blog/articles/UTG-Q-010-Targeted-Attack-Campaign-Against-the-AI-and-Gaming-Industry-EN/; classtype:trojan-activity; sid:2054346; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_07_05, deployment Perimeter, malware_family Xworm, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_05, reviewed_at 2025_04_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)