ET MALWARE Win32/Kryptik_AGen.DOP C2 Checkin

Query · suricata

flow:established,to_server;
dsize:<30;
content:"|b7|"; startswith;
content:"|b6 ec e0 ec|"; endswith; fast_pattern;
threshold:type limit, seconds 30, count 1, track by_src;
Raw source ET MALWARE Win32/Kryptik_AGen.DOP C2 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 tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Kryptik_AGen.DOP C2 Checkin";
    flow:established,to_server;
    dsize:<30;
    content:"|b7|"; startswith;
    content:"|b6 ec e0 ec|"; endswith; fast_pattern;
    threshold:type limit, seconds 30, count 1, track by_src;
    reference:md5,c8e6cd1fb6f5dfe1ab548024a7f67043;
    classtype:command-and-control;
    sid:2054620; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2024_07_19, deployment Perimeter, malware_family Win32_Kryptik_AGen_DOP, confidence High, signature_severity Major, tag c2, updated_at 2024_07_19, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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