alert tcp $SQL_SERVERS 1433 -> $EXTERNAL_NET any (msg:"GPL SQL sa brute force failed login attempt"; flow:established,to_client; content:"Login failed for user 'sa'"; threshold:type threshold, track by_src, count 5, seconds 2; reference:bugtraq,4797; reference:cve,2000-1209; reference:nessus,10673; classtype:unsuccessful-user; sid:2103152; rev:5; metadata:created_at 2010_09_23, cve CVE_2000_1209, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_08;)