alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed UAC-0050 Domain (tax-gov-ua .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".tax-gov-ua.com"; endswith; fast_pattern; reference:url,cert.gov.ua/article/6281202; classtype:trojan-activity; sid:2057170; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_10_31, deployment Perimeter, confidence High, signature_severity Major, tag UAC_0050, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_10_31, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)