MSSQL Server Failed Logon From External Network

Detects failed logon attempts from clients with external network IP to an MSSQL server. This can be a sign of a bruteforce attack.

Detection logic

Platform: Containers ESXi IaaS Identity Provider Linux macOS Network Devices Office Suite SaaS Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
Log source product: windows
Log source service: application

Links the source published beside this detection. Reference is the link the source wrote, unmodified. Class is decided by this catalogue from the host and path, not stated by the source. Cited by counts published detections citing the same resource, including this one, and the sources beneath it count the repositories this catalogue ingests, which is not the same as independent research.
Reference	Class	Cited by
cybersecthreat.com/2020/07/08/enable-mssql-authentication-log-to-eventlog/	Unclassified	2
www.experts-exchange.com/questions/27800944/EventID-18456-Failed-to-open-the-explicitly-specified-database.html	Unclassified	2