Microsoft 365 User Restricted from Sending Email
Elastic Stack Serverless Security
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: 5m
Searches indices from: now-30m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)
Maximum alerts per execution: 100
References:
- https://docs.microsoft.com/en-us/cloud-app-security/anomaly-detection-policy
- https://docs.microsoft.com/en-us/cloud-app-security/policy-template-reference
Tags:
- Elastic
- Cloud
- Microsoft 365
- Continuous Monitoring
- SecOps
- Configuration Audit
Version: 4
Rule authors:
- Austin Songer
Rule license: Elastic License v2
event.dataset:o365.audit and event.provider:SecurityComplianceCenter and event.category:web and event.action:"User restricted from sending email" and event.outcome:success
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/