Excessive logon failures
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About the rule
Rule Type
Standard
Rule Description
A series of multiple logon failures by the same account.
Severity
Critical
Rule Requirement
Criteria
Action1: actionname = "failed_logon" | timewindow 2m | groupby USERNAME having COUNT > 5 select Action1.timewindow.MESSAGE,Action1.timewindow.HOSTTYPE,Action1.timewindow.HOSTNAME,Action1.timewindow.REMOTEHOST,Action1.timewindow.USERNAME
Detection
Execution Mode
realtime
Log Sources
Miscellaneous
