Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/RecordBreaker CnC Checkin M1"; flow:established,to_server; http.method; content:"POST"; http.header_names; content:!"Referer"; http.request_body; content:"machineId="; fast_pattern; pcre:"/^[a-f0-9]{8}-(?:[a-f0-9]{4}-){3}[a-f0-9]{12}\|/R"; content:"configId="; pcre:"/^[a-f0-9]{32}/R"; reference:md5,f75f596f7a0369717476f304eef7fe9b; classtype:trojan-activity; sid:2036934; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_06_08, deployment Perimeter, malware_family RecordBreaker, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_07_14, reviewed_at 2025_07_14;)