IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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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: 5 minutes

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

Maximum alerts per execution: 100

Tags:

Elastic
Cloud
Microsoft 365
Continuous Monitoring
SecOps
Identity and Access

Version: 6 (version history)

Added (Elastic Stack release): 7.14.0

Last modified (Elastic Stack release): 8.4.0

Rule authors: Elastic, Austin Songer

Rule license: Elastic License v2

Potential false positives

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Automated processes that attempt to authenticate using expired credentials and unbounded retries may lead to false positives.

Investigation guide

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Rule query

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

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
Technique:
- Name: Brute Force
- ID: T1110
- Reference URL: https://attack.mitre.org/techniques/T1110/

Rule version history

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Version 6 (8.4.0 release)

Formatting only

Version 4 (8.1.0 release)

Formatting only

Version 3 (8.0.0 release)

Updated query, changed from:

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

Version 2 (7.15.0 release)

Formatting only

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