ET SCAN SQLNinja MSSQL User Scan

Query · suricata

content:"?param=a";
flow:to_server,established;
content:"if%20ascii%28substring%28%28select%20system%5Fuser"; distance:2;
threshold:type threshold, track by_src, count 20, seconds 10;
Raw source ET SCAN SQLNinja MSSQL User Scan · 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 http $EXTERNAL_NET any -> $HTTP_SERVERS any (
    msg:"ET SCAN SQLNinja MSSQL User Scan";
    content:"?param=a";
    flow:to_server,established;
    content:"if%20ascii%28substring%28%28select%20system%5Fuser"; distance:2;
    threshold:type threshold, track by_src, count 20, seconds 10;
    reference:url,sqlninja.sourceforge.net/index.html;
    classtype:attempted-recon;
    sid:2009040; rev:5;
    metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, updated_at 2019_09_27;
)

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