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

« O365 Email Reported by User as Malware or Phish O365 Exchange Suspicious Mailbox Right Delegation »

› › ›

O365 Excessive Single Sign-On Logon Errors

edit

O365 Excessive Single Sign-On Logon Errors

edit

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: 102

Rule authors:

Elastic
Austin Songer

Rule license: Elastic License v2

Investigation guide

edit

Rule query

edit

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

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/

« O365 Email Reported by User as Malware or Phish O365 Exchange Suspicious Mailbox Right Delegation »