ET MALWARE Ransomware Win32/WinPlock.A CnC Beacon 3

Query · suricata

flow:established,to_server;
urilen:1;
http.method;
content:"POST";
http.request_body;
content:"unit_action="; depth:12; fast_pattern;
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE Ransomware Win32/WinPlock.A CnC Beacon 3 · 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 Ransomware Win32/WinPlock.A CnC Beacon 3";
    flow:established,to_server;
    urilen:1;
    http.method;
    content:"POST";
    http.request_body;
    content:"unit_action="; depth:12; fast_pattern;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,b8a1012e3afc6eabb7819ce4d8e2b93b;
    classtype:command-and-control;
    sid:2021854; rev:5;
    metadata:attack_target Client_Endpoint, created_at 2015_09_30, deployment Perimeter, malware_family Win32_WinPlock_A, signature_severity Major, tag c2, updated_at 2020_06_02, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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