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Elastic Docs ›Elastic Security Solution [8.15] ›Detections and alerts ›Prebuilt rule reference

O365 Excessive Single Sign-On Logon Errors

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O365 Excessive Single Sign-On Logon Errors

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Identifies accounts with a high number of single sign-on (SSO) logon errors. Excessive logon errors may indicate an attempt to brute force a password or SSO token.

Rule type: threshold

Rule indices:

  • filebeat-*
  • logs-o365*

Severity: high

Risk score: 73

Runs every: 5m

Searches indices from: now-20m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

  • Domain: Cloud
  • Data Source: Microsoft 365
  • Use Case: Identity and Access Audit
  • Tactic: Credential Access

Version: 207

Rule authors:

  • Elastic
  • Austin Songer

Rule license: Elastic License v2

Investigation guide

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Setup

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The Office 365 Logs Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.

Rule query

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event.dataset:o365.audit and event.provider:AzureActiveDirectory and event.category:authentication and o365.audit.LogonError:"SsoArtifactInvalidOrExpired"

Framework: MITRE ATT&CKTM

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