Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Transparent Tribe CnC Domain (mus09 .duckdns .org in TLS SNI)"; flow:established,to_server; tls.sni; bsize:17; content:"mus09.duckdns.org"; fast_pattern; reference:url,www.ctfiot.com/195318.html; classtype:trojan-activity; sid:2054808; rev:2; metadata:attack_target Client_Endpoint, created_at 2024_07_31, deployment Perimeter, deprecation_reason Age, confidence High, signature_severity Major, tag TransparentTribe, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_04_15, reviewed_at 2025_04_15, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)