ET FTP Possible FTP Daemon Username UNION SELECT SQL Injection Attempt

Query · suricata

flow:established,to_server;
content:"USER"; depth:4;
content:"UNION"; within:200; nocase;
content:"SELECT"; distance:0; nocase;
pcre:"/UNION.+SELECT/i";
Raw source ET FTP Possible FTP Daemon Username UNION SELECT SQL Injection Attempt · Suricata
Esc
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 -> $HOME_NET 21 (
    msg:"ET FTP Possible FTP Daemon Username UNION SELECT SQL Injection Attempt";
    flow:established,to_server;
    content:"USER"; depth:4;
    content:"UNION"; within:200; nocase;
    content:"SELECT"; distance:0; nocase;
    pcre:"/UNION.+SELECT/i";
    reference:url,en.wikipedia.org/wiki/SQL_injection;
    classtype:attempted-user;
    sid:2009985; rev:2;
    metadata:affected_product Web_Server_Applications, attack_target Web_Server, created_at 2010_07_30, deployment Datacenter, confidence Medium, signature_severity Major, tag SQL_Injection, updated_at 2019_07_26, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)

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