New Windows Reserved Filenames staged on Office file services

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This identifies new Windows Reserved Filenames on Office services like SharePoint and OneDrive in the past 7 days. It also detects when a user uploads these files to another user's workspace, which may indicate malicious activity.

Attribute	Value
Type	Hunting Query
Solution	Microsoft 365
ID	641ecd2d-27c9-4f05-8433-8205096b09fc
Tactics	CommandAndControl
Techniques	T1105
Required Connectors	Office365
Source	View on GitHub

Tables Used

This content item queries data from the following tables:

Table	Transformations	Ingestion API	Lake-Only
OfficeActivity	✓	✗	?

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