ET MALWARE Win32/Valak <v20 Checkin - Server Response

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
http.response_body;
content:"|2d 2d|BODYdmFyIGNvbmZpZyA9IHsNCiA"; startswith;
Raw source ET MALWARE Win32/Valak <v20 Checkin - Server Response · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Win32/Valak <v20 Checkin - Server Response";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    http.response_body;
    content:"|2d 2d|BODYdmFyIGNvbmZpZyA9IHsNCiA"; startswith;
    reference:md5,c254b4f261a6f426c282ed8858a7bee0;
    reference:url,medium.com/@prsecurity_/casual-analysis-of-valak-c2-3497fdb79bf7;
    classtype:command-and-control;
    sid:2029194; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2019_12_22, deployment Perimeter, malware_family Win32_Valak, performance_impact Low, confidence High, signature_severity Major, updated_at 2019_12_22;
)

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