alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed APT42/TA453 Related Domain (m85 .online in TLS SNI)"; flow:established,to_server; tls.sni; bsize:10; content:"m85.online"; fast_pattern; reference:url,cloud.google.com/blog/topics/threat-intelligence/untangling-iran-apt42-operations; classtype:misc-activity; sid:2052422; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_05_06, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_06, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)