alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING TA453 Domain in TLS SNI (d75 .site)"; flow:established,to_server; tls.sni; dotprefix; content:".d75.site"; endswith; fast_pattern; reference:url,cloud.google.com/blog/topics/threat-intelligence/untangling-iran-apt42-operations; classtype:misc-activity; sid:2055247; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2024_03_04, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag TA453, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_08_13, reviewed_at 2024_12_11, former_sid 2856441, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)