alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Darkgate Domain (trans1ategooglecom .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".trans1ategooglecom.com"; endswith; fast_pattern; reference:url,www.malware-traffic-analysis.net/2023/11/30/index.html; classtype:domain-c2; sid:2049437; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_12_01, deployment Perimeter, confidence High, signature_severity Major, tag RAT, tag SSL_TLS_SNI, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_13, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)