alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed DarkGate Domain (zochao .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".zochao.com"; endswith; fast_pattern; reference:url,twitter.com/0xToxin/status/1701883445708771822; reference:url,0xtoxin.github.io/threat%20breakdown/DarkGate-Camapign-Analysis/; classtype:domain-c2; sid:2048097; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_09_15, deployment Perimeter, confidence High, signature_severity Major, tag SSL_TLS_SNI, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_04, reviewed_at 2023_09_15, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)