alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_SERVER Possible MySQL SQLi User-Dump Attempt"; flow:to_server,established; http.uri; content:"select"; nocase; content:"mysql.user"; nocase; distance:1; reference:url,pentestmonkey.net/cheat-sheet/sql-injection/mysql-sql-injection-cheat-sheet; classtype:web-application-attack; sid:2017807; rev:4; metadata:created_at 2013_12_06, confidence Medium, signature_severity Minor, updated_at 2020_04_27;)