ET MALWARE W32/DirCrypt.Ransomware CnC Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.request_body;
content:"Content-Disposition|3A| form-data|3B| name=|22|cmd|22|";
content:"Content-Disposition|3A| form-data|3B| name=|22|botid|22|"; fast_pattern;
content:"Content-Disposition|3A| form-data|3B| name=|22|lid|22|";
Raw source ET MALWARE W32/DirCrypt.Ransomware CnC Checkin · Suricata
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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 W32/DirCrypt.Ransomware CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.request_body;
    content:"Content-Disposition|3A| form-data|3B| name=|22|cmd|22|";
    content:"Content-Disposition|3A| form-data|3B| name=|22|botid|22|"; fast_pattern;
    content:"Content-Disposition|3A| form-data|3B| name=|22|lid|22|";
    reference:url,blog.avast.com/2013/10/24/what-to-do-if-your-computer-is-attacked-by-ransomware/;
    reference:url,blog.avast.com/2013/11/21/ransomware-annoys-its-victims-by-displaying-child-pornography-pictures/#more-20393;
    reference:url,johannesbader.ch/2015/03/the-dga-of-dircrypt;
    reference:url,anubis.iseclab.org/?action=result&task_id=19e3b6cbfdf8d6bd429ecc75ed016fb91;
    classtype:command-and-control;
    sid:2017308; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2013_08_12, deployment Perimeter, signature_severity Major, tag Ransomware, updated_at 2020_04_27, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)

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