ET MALWARE Snake rootkit usermode-centric encrypted command from server

Query · suricata

flow:to_client,established;
http.stat_code;
content:"200";
file.data;
content:"|01 00 00 00 00 00 00 00|1dM3uu4j7Fw4sjnb"; fast_pattern;
Raw source ET MALWARE Snake rootkit usermode-centric encrypted command from server · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Snake rootkit usermode-centric encrypted command from server";
    flow:to_client,established;
    http.stat_code;
    content:"200";
    file.data;
    content:"|01 00 00 00 00 00 00 00|1dM3uu4j7Fw4sjnb"; fast_pattern;
    reference:url,info.baesystemsdetica.com/rs/baesystems/images/snake_whitepaper.pdf;
    classtype:trojan-activity;
    sid:2018248; rev:4;
    metadata:created_at 2014_03_11, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_06;
)

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