ET MALWARE Win32/CryptFile2 Ransomware Checkin

Query · suricata

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;
Raw source ET MALWARE Win32/CryptFile2 Ransomware Checkin · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
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;
)

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