Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/CryptFile2 Ransomware Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.request_body; content:"|3d 30 78 30 36 2c 30 78 30 32 2c 30 78 30 30 2c 30 78 30 30|"; fast_pattern; content:"|2c 3c 62 72 3e 30 78|"; distance:0; content:"|2c 3c 62 72 3e 30 78|"; distance:0; content:"|2c 3c 62 72 3e 30 78|"; distance:0; reference:md5,5bb7d85f7a5f1d2b01efabe5635e2992; classtype:command-and-control; sid:2022683; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_03_29, deployment Perimeter, malware_family Ransomware, malware_family CryptFile2, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_03, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)