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This query checks for the IIS worker process dropping files that resemble web shells and other artifacts seen in known attacks. Reference: https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server
| Attribute | Value |
|---|---|
| Type | Hunting Query |
| Solution | Web Shells Threat Protection |
| ID | 42e7df5b-80f6-49a5-946a-08026ec24807 |
| Tactics | Execution, Persistence |
| Required Connectors | MicrosoftThreatProtection |
| Source | View on GitHub |
This content item queries data from the following tables:
| Table | Selection Criteria | Transformations | Ingestion API | Lake-Only |
|---|---|---|---|---|
DeviceFileEvents |
FolderPath !endswith ".ini"FolderPath !endswith ".js"FolderPath !endswith ".json"FolderPath !endswith ".log"FolderPath !endswith ".tmp"FolderPath !endswith ".vb"FolderPath !endswith ".xml"FolderPath has_any "\\wwwroot\\"InitiatingProcessCommandLine contains "MSExchange"InitiatingProcessFileName == "w3wp.exe" |
✓ | ✗ | ? |
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