Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Payload Downloader Domain (capclean2024may .blogspot .com in TLS SNI)"; flow:established,to_server; tls.sni; bsize:28; content:"capclean2024may.blogspot.com"; fast_pattern; reference:md5,d1528b4fd48104873a60abd4c5477d8d; classtype:trojan-activity; sid:2054538; rev:2; metadata:attack_target Client_Endpoint, created_at 2024_07_17, deployment Perimeter, deprecation_reason Age, confidence High, signature_severity Major, 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;)