Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Malvertising Domain (doxy .icu in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".doxy.icu"; endswith; fast_pattern; reference:url,x.com/CyberRaiju/status/1811314197742940258; reference:url,x.com/ValidinLLC/status/1811407786019840292; classtype:trojan-activity; sid:2054447; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_07_11, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_11, reviewed_at 2025_05_14, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)