ET MALWARE Win32/Nitol.A CnC Checkin M3

Query · suricata

flow:to_server,established;
dsize:8;
content:"|04 00 00 00 1b 8d 34 01|";
threshold:type both, track by_src, count 10, seconds 120;
stream_size:server, =, 1;
Raw source ET MALWARE Win32/Nitol.A CnC Checkin M3 · 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 1024: (
    msg:"ET MALWARE Win32/Nitol.A CnC Checkin M3";
    flow:to_server,established;
    dsize:8;
    content:"|04 00 00 00 1b 8d 34 01|";
    threshold:type both, track by_src, count 10, seconds 120;
    stream_size:server, =, 1;
    reference:url,asec.ahnlab.com/en/44504;
    reference:md5,f01b49498b82320973c6006ee117f91e;
    classtype:trojan-activity;
    sid:2043277; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_01_11, deployment Perimeter, malware_family Win32_Nitol_A, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_01_11, reviewed_at 2025_10_24;
)

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