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Identifies files signed by certificates with a lifespan <= 14 days on non-developer endpoints. While legitimate software certs last 1+ years, ephemeral certs indicate Malware-Signing-as-a-Service (MSaaS) abuse to evade reputation-based controls.
| Attribute | Value |
|---|---|
| Type | Hunting Query |
| Solution | Standalone Content |
| ID | e920899f-edf0-446c-bb13-effbaf61b27b |
| Tactics | DefenseEvasion, ResourceDevelopment |
| Techniques | T1553.002, T1588.003 |
| Required Connectors | MicrosoftThreatProtection |
| Source | [View on GitHub](https://github.com/Azure/Azure-Sentinel/blob/master/Hunting Queries/Microsoft%20365%20Defender/Defense%20evasion/Short-livedEphemeralCodeSigningCertificates.yaml) |
This content item queries data from the following tables:
| Table | Transformations | Ingestion API | Lake-Only |
|---|---|---|---|
DeviceFileCertificateInfo |
✓ | ✗ | ✓ |
DeviceInfo |
✓ | ✗ | ✓ |
DeviceTvmSoftwareInventory |
✓ | ✗ | ✓ |
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