ET MALWARE LURK Trojan Communication Protocol detected

Query · suricata

flow:established,to_server;
content:"LURK|30|"; depth:5;
content:"|78 9c|"; distance:8;
Raw source ET MALWARE LURK Trojan Communication Protocol detected · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $HOME_NET any -> $EXTERNAL_NET 80 (
    msg:"ET MALWARE LURK Trojan Communication Protocol detected";
    flow:established,to_server;
    content:"LURK|30|"; depth:5;
    content:"|78 9c|"; distance:8;
    reference:url,www.commandfive.com/papers/C5_APT_C2InTheFifthDomain.pdf;
    classtype:trojan-activity;
    sid:2014225; rev:3;
    metadata:created_at 2012_02_14, signature_severity Major, updated_at 2019_07_26;
)

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