alert tcp $EXTERNAL_NET any -> $SQL_SERVERS 139 (msg:"GPL SQL shellcode attempt"; flow:to_server,established; content:"H|00|%|00|x|00|w|00 90 00 90 00 90 00 90 00 90 00|3|00 C0 00|P|00|h|00|.|00|"; classtype:attempted-user; sid:2100694; rev:7; metadata:created_at 2010_09_23, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)