ET MALWARE Gamut Spambot Checkin Response

Query · suricata

flow:established,from_server;
file_data;
content:"count_threads|09 09 09 3d 09|"; depth:18; fast_pattern;
content:"|0a|efficiency_limit|09 09 3d 09|"; distance:1; within:22;
flowbits:isset,ETGamut;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET MALWARE Gamut Spambot Checkin Response · 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 Gamut Spambot Checkin Response";
    flow:established,from_server;
    file_data;
    content:"count_threads|09 09 09 3d 09|"; depth:18; fast_pattern;
    content:"|0a|efficiency_limit|09 09 3d 09|"; distance:1; within:22;
    flowbits:isset,ETGamut;
    reference:url,www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/gamut-spambot-analysis;
    reference:md5,f00f3f47062646f900aa327b1d5ca3a1;
    classtype:command-and-control;
    sid:2018246; rev:3;
    metadata:created_at 2014_03_11, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_01;
)

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