Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE CryptoPatronum Ransomware CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.request_body; content:"id="; startswith; content:"&username="; distance:0; content:"&pname="; distance:0; content:"&kid="; distance:0; fast_pattern; content:"&ppath="; distance:0; http.header_names; content:!"Referer"; content:!"User-Agent"; reference:md5,429ba4a470eb2f3c0ce6678745bc8d8e; classtype:command-and-control; sid:2029349; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_02_04, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_02_04, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)