ET MALWARE Linux/ChinaZ DDoS Bot Checkin

Query · suricata

flow:established,to_server;
content:"|00 00 00 00|"; depth:4;
content:!"|00|"; within:1;
content:"MHz|00|"; distance:0;
content:"|20 2a 20|"; distance:-12; within:5;
pcre:"/^\d+MHz\x00/R";
content:"|20|MB|00|"; distance:0; fast_pattern;
Raw source ET MALWARE Linux/ChinaZ DDoS Bot Checkin · 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/ChinaZ DDoS Bot Checkin";
    flow:established,to_server;
    content:"|00 00 00 00|"; depth:4;
    content:!"|00|"; within:1;
    content:"MHz|00|"; distance:0;
    content:"|20 2a 20|"; distance:-12; within:5;
    pcre:"/^\d+MHz\x00/R";
    content:"|20|MB|00|"; distance:0; fast_pattern;
    reference:url,kernelmode.info/forum/viewtopic.php?f=16&t=3682;
    classtype:command-and-control;
    sid:2020188; rev:1;
    metadata:created_at 2015_01_15, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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