ET MALWARE Suspected Kimsuky APT RevClient Related Activity

Query · suricata

flow:established,to_server;
dsize:50<>100;
content:"|3b|"; offset:3; depth:2;
content:"|3b|Windows|20|"; distance:0; fast_pattern;
content:"|2e|"; within:30;
content:"|3b|"; endswith;
target:src_ip;
Raw source ET MALWARE Suspected Kimsuky APT RevClient Related Activity · 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 2086 (
    msg:"ET MALWARE Suspected Kimsuky APT RevClient Related Activity";
    flow:established,to_server;
    dsize:50<>100;
    content:"|3b|"; offset:3; depth:2;
    content:"|3b|Windows|20|"; distance:0; fast_pattern;
    content:"|2e|"; within:30;
    content:"|3b|"; endswith;
    reference:md5,02804d632675b2a3711e19ef217a2877;
    reference:url,asec.ahnlab.com/en/57873/;
    classtype:trojan-activity;
    sid:2049686; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_12_13, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_13;
    target:src_ip;
)

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