Spike in Logon Events from a Source IPedit

A machine learning job found an unusually large spike in successful authentication events from a particular source IP address. This can be due to password spraying, user enumeration or brute force activity.

Rule type: machine_learning

Rule indices: None

Severity: low

Risk score: 21

Runs every: 15m

Searches indices from: now-30m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100



  • Elastic
  • Authentication
  • Threat Detection
  • ML

Version: 2

Rule authors:

  • Elastic

Rule license: Elastic License v2