alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"ET SCAN Possible SQLMAP Scan"; flow:established,to_server; http.uri; content:"UNION ALL SELECT NULL, NULL, NULL, NULL"; content:"-- AND"; detection_filter:track by_dst, count 4, seconds 20; reference:url,sqlmap.sourceforge.net; reference:url,www.darknet.org.uk/2011/04/sqlmap-0-9-released-automatic-blind-sql-injection-tool/; classtype:attempted-recon; sid:2012754; rev:3; metadata:created_at 2011_04_29, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_20;)