ET MALWARE Linux/Xnote Keep-Alive

Query · suricata

flow:established,to_server;
dsize:17;
content:"|11 00 00 00 01 00 00 00 78 9c 4b 05 00 00 66 00 66|"; fast_pattern;
Raw source ET MALWARE Linux/Xnote Keep-Alive · 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Linux/Xnote Keep-Alive";
    flow:established,to_server;
    dsize:17;
    content:"|11 00 00 00 01 00 00 00 78 9c 4b 05 00 00 66 00 66|"; fast_pattern;
    reference:url,deependresearch.org/2015/02/linuxbackdoorxnote1-indicators.html;
    classtype:trojan-activity;
    sid:2020389; rev:2;
    metadata:created_at 2015_02_11, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_08;
)

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