ET SCAN MYSQL 4.1 brute force root login attempt

Query · suricata

flow:to_server,established;
content:"|01|"; offset:3; depth:4;
content:"root|00|"; nocase; distance:32; within:5;
threshold:type both,track by_src,count 5,seconds 60;
Raw source ET SCAN MYSQL 4.1 brute force root login attempt · 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 $EXTERNAL_NET any -> $SQL_SERVERS 3306 (
    msg:"ET SCAN MYSQL 4.1 brute force root login attempt";
    flow:to_server,established;
    content:"|01|"; offset:3; depth:4;
    content:"root|00|"; nocase; distance:32; within:5;
    threshold:type both,track by_src,count 5,seconds 60;
    reference:url,www.redferni.uklinux.net/mysql/MySQL-Protocol.html;
    classtype:protocol-command-decode;
    sid:2002842; rev:4;
    metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, updated_at 2019_07_26;
)

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