Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed DOUBLEBACK Related Domain (barricks .org in TLS SNI)"; flow:established,to_server; tls.sni; content:"barricks.org"; bsize:12; fast_pattern; reference:md5,a0b04a7f13d1e54a99b07d3f293c1ce5; classtype:command-and-control; sid:2043406; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_01_20, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_02, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)