ET MALWARE Linux/ChinaZ DDoS Bot Checkin 2

Query · suricata

flow:established,to_server;
content:"*";
pcre:"/^\d+/R";
content:"MHZ|00 00 00 00|"; fast_pattern; within:7;
content:"MB|00 00 00 00|"; distance:0;
content:"M|00 00 00 00|"; distance:0;
content:"|3b|"; distance:0;
pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/R";
Raw source ET MALWARE Linux/ChinaZ DDoS Bot Checkin 2 · 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 any (
    msg:"ET MALWARE Linux/ChinaZ DDoS Bot Checkin 2";
    flow:established,to_server;
    content:"*";
    pcre:"/^\d+/R";
    content:"MHZ|00 00 00 00|"; fast_pattern; within:7;
    content:"MB|00 00 00 00|"; distance:0;
    content:"M|00 00 00 00|"; distance:0;
    content:"|3b|"; distance:0;
    pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/R";
    reference:url,blog.malwaremustdie.org/2015/06/the-elf-chinaz-reloaded.html;
    classtype:command-and-control;
    sid:2021316; rev:1;
    metadata:created_at 2015_06_22, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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