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This query looks for errors that may indicate that an attacker is attempting to exploit a vulnerability in the service. Reference: https://www.microsoft.com/security/blog/2021/03/02/hafnium-targeting-exchange-servers/
| Attribute | Value |
|---|---|
| Type | Analytic Rule |
| Solution | Standalone Content |
| ID | 0625fcce-6d52-491e-8c68-1d9b801d25b9 |
| Severity | Low |
| Kind | Scheduled |
| Tactics | InitialAccess |
| Techniques | T1190 |
| Source | View on GitHub |
This content item queries data from the following tables:
| Table | Selection Criteria | Transformations | Ingestion API | Lake-Only |
|---|---|---|---|---|
Event |
EventLevelName == "error"EventLog == "Application"RenderedDescription !contains "System.OutOfMemoryException"RenderedDescription contains "MSExchange Unified Messaging"RenderedDescription contains "TextFormattingRunProperties"RenderedDescription contains "umworkerprocess"RenderedDescription startswith "An unhandled exception occurred in a UM worker process"RenderedDescription startswith "The Microsoft Exchange Unified Messaging service"RenderedDescription startswith "Watson report"Source startswith "MSExchange" |
✓ | ✓ | ✗ |
The following connectors provide data for this content item:
| Connector | Solution |
|---|---|
| ESI-Opt2ExchangeServersEventLogs | Microsoft Exchange Security - Exchange On-Premises |
Solutions: Microsoft Exchange Security - Exchange On-Premises
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