ET MALWARE Win32.Crypren/Zcrypt Ransomware Checkin

Query · suricata

flow:established,to_server;
http.uri;
content:".php?computerid=";
pcre:"/\.php\?computerid=[a-fA-F0-9]{32}&(?:public|private)=\d$/";
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE Win32.Crypren/Zcrypt 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32.Crypren/Zcrypt Ransomware Checkin";
    flow:established,to_server;
    http.uri;
    content:".php?computerid=";
    pcre:"/\.php\?computerid=[a-fA-F0-9]{32}&(?:public|private)=\d$/";
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,7efb738c2b04aacdd3354d590cb3df47;
    classtype:command-and-control;
    sid:2022897; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2016_06_14, deployment Perimeter, signature_severity Major, tag Ransomware, updated_at 2020_07_15, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)

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