ET MALWARE Athena DDoS Bot Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"POST"; nocase;
http.header_names;
content:!"Referer|0d 0a|";
http.request_body;
content:"a=%"; depth:3; fast_pattern;
content:"&b="; distance:0;
content:"&c="; distance:0;
pcre:"/^a=(?:%[0-9A-Fa-f]{2})+\x26b=[0-9A-Za-z]+(?:%3[dD]){0,2}\x26c=(?:%[0-9A-Fa-f]{2})+$/";
Raw source ET MALWARE Athena DDoS Bot Checkin · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Athena DDoS Bot Checkin";
    flow:established,to_server;
    http.method;
    content:"POST"; nocase;
    http.header_names;
    content:!"Referer|0d 0a|";
    http.request_body;
    content:"a=%"; depth:3; fast_pattern;
    content:"&b="; distance:0;
    content:"&c="; distance:0;
    pcre:"/^a=(?:%[0-9A-Fa-f]{2})+\x26b=[0-9A-Za-z]+(?:%3[dD]){0,2}\x26c=(?:%[0-9A-Fa-f]{2})+$/";
    reference:md5,19ca0d830cd7b44e5de1ab85f4e17d82;
    classtype:command-and-control;
    sid:2017633; rev:5;
    metadata:created_at 2013_04_26, signature_severity Major, updated_at 2020_05_15;
)

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