Azure Active Directory High Risk Sign-in

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Identifies high risk Azure Active Directory (AD) sign-ins by leveraging Microsoft’s Identity Protection machine learning and heuristics. Identity Protection categorizes risk into three tiers: low, medium, and high. While Microsoft does not provide specific details about how risk is calculated, each level brings higher confidence that the user or sign-in is compromised.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-azure*

Severity: high

Risk score: 73

Runs every: 5m

Searches indices from: now-25m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Elastic
  • Cloud
  • Azure
  • Continuous Monitoring
  • SecOps
  • Identity and Access

Version: 3

Rule authors:

  • Elastic
  • Willem D’Haese

Rule license: Elastic License v2

Investigation guide

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## Config

The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.

Rule query

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event.dataset:azure.signinlogs and
  (azure.signinlogs.properties.risk_level_during_signin:high or azure.signinlogs.properties.risk_level_aggregated:high) and
  event.outcome:(success or Success)

Framework: MITRE ATT&CKTM