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This query uses Windows Event ID 5136 in order to detect potential webshell deployment by exploitation of CVE-2021-27065. This query looks for changes to the InternalHostName or ExternalHostName properties of Exchange OAB Virtual Directory objects in AD Directory Services where the new objects contain potential webshell objects.
| Attribute | Value |
|---|---|
| Type | Analytic Rule |
| Solution | Windows Security Events |
| ID | faf1a6ff-53b5-4f92-8c55-4b20e9957594 |
| Severity | High |
| Status | Available |
| Kind | Scheduled |
| Tactics | InitialAccess |
| Techniques | T1190 |
| Required Connectors | SecurityEvents, WindowsSecurityEvents |
| Source | View on GitHub |
This content item queries data from the following tables:
| Table | Selection Criteria | Transformations | Ingestion API | Lake-Only |
|---|---|---|---|---|
SecurityEvent |
EventID == "5136" |
✓ | ✓ | ? |
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