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Microsoft 365 User Restricted from Sending Emailedit
Identifies when a user has been restricted from sending email due to exceeding sending limits of the service policies per the Security Compliance Center.
Rule type: query
Rule indices:
- filebeat-*
- logs-o365*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-30m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Cloud
- Microsoft 365
- Continuous Monitoring
- SecOps
- Configuration Audit
Version: 101 (version history)
Added (Elastic Stack release): 7.16.0
Last modified (Elastic Stack release): 8.6.0
Rule authors: Austin Songer
Rule license: Elastic License v2
Potential false positivesedit
A user sending emails using personal distribution folders may trigger the event.
Investigation guideedit
Rule queryedit
event.dataset:o365.audit and event.provider:SecurityComplianceCenter and event.category:web and event.action:"User restricted from sending email" and event.outcome:success
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Initial Access
- ID: TA0001
- Reference URL: https://attack.mitre.org/tactics/TA0001/
-
Technique:
- Name: Valid Accounts
- ID: T1078
- Reference URL: https://attack.mitre.org/techniques/T1078/
Rule version historyedit
- Version 101 (8.6.0 release)
-
- Formatting only
- Version 100 (8.5.0 release)
-
- Formatting only
- Version 4 (8.4.0 release)
-
- Formatting only
- Version 2 (8.1.0 release)
-
- Formatting only