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This query lists inbound sender domains with the most email authentication failures (DMARC, DKIM, SPF, and Composite Authentication), using the EmailEvents table.
| Attribute | Value |
|---|---|
| Type | Hunting Query |
| Solution | GitHub Only |
| ID | 5722f6ce-0ac1-4783-9e15-3f7e390abe01 |
| Tactics | InitialAccess |
| Techniques | T1566 |
| Required Connectors | MicrosoftThreatProtection |
| Source | [View on GitHub](https://github.com/Azure/Azure-Sentinel/blob/master/Hunting Queries/Microsoft%20365%20Defender/Email%20and%20Collaboration%20Queries/Authentication/Inbound%20Sender%20Domains%20Failing%20Email%20Authentication.yaml) |
This content item queries data from the following tables:
| Table | Selection Criteria | Transformations | Ingestion API | Lake-Only |
|---|---|---|---|---|
EmailEvents |
EmailDirection == "Inbound"OrgLevelPolicy !in "Phishing simulation,SecOps Mailbox" |
✓ | ✗ | ✓ |
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