M365 Defender Alerts Signal
Identifies alerts generated by Microsoft Defender products including Windows Defender for Endpoint (WDATP), Microsoft Cloud App Security (MCAS), Microsoft Defender for Identity, Microsoft 365 Defender custom detections, and Defender Experts for XDR. These cross-platform alerts indicate detected threats across endpoints, cloud applications, and identity systems. This building block rule generates security events for correlation, threat hunting, and telemetry collection to support comprehensive threat detection.
Rule type: query
Rule indices:
- logs-o365.audit-*
- filebeat-*
Rule Severity: low
Risk Score: 21
Runs every:
Searches indices from: now-9m
Maximum alerts per execution: 100
References:
- https://learn.microsoft.com/en-us/defender-endpoint/
- https://learn.microsoft.com/en-us/defender-cloud-apps/
- https://learn.microsoft.com/en-us/defender-for-identity/
- https://learn.microsoft.com/en-us/office/office-365-management-api/office-365-management-activity-api-schema#enum-auditlogrecordtype---type-edmint32
Tags:
- Domain: Cloud
- Domain: SaaS
- Domain: Endpoint
- Data Source: Microsoft 365
- Data Source: Microsoft 365 Audit Logs
- Data Source: Microsoft Defender for Endpoint
- Data Source: Microsoft Defender for Cloud Apps
- Data Source: Microsoft Defender for Identity
- Use Case: Threat Detection
- Tactic: Initial Access
- Tactic: Execution
- Tactic: Defense Evasion
- Rule Type: BBR
Version: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
For information on troubleshooting the maximum alerts warning please refer to this guide.
event.dataset:o365.audit and
event.code:(WDATPAlerts or MCASAlerts or MicrosoftDefenderForIdentityAudit or MS365DCustomDetection or DefenderExpertsforXDRAdmin)
Framework: MITRE ATT&CK
- Tactic:
- Name: Initial Access
- Id: TA0001
- Reference URL: https://attack.mitre.org/tactics/TA0001/
Framework: MITRE ATT&CK
- Tactic:
- Name: Execution
- Id: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
Framework: MITRE ATT&CK
- Tactic:
- Name: Defense Evasion
- Id: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/