Spike in Logon Events

edit

A machine learning job found an unusually large spike in successful authentication events. 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

References:

Tags:

  • Use Case: Identity and Access Audit
  • Use Case: Threat Detection
  • Rule Type: ML
  • Rule Type: Machine Learning
  • Tactic: Credential Access

Version: 103

Rule authors:

  • Elastic

Rule license: Elastic License v2

Framework: MITRE ATT&CKTM