User added to Teams and immediately uploads file

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This hunting queries identifies users who are added to a Teams Channel or Teams chat and within 1 minute of being added upload a file via the chat. This might be an indicator of suspicious activity.

Attribute	Value
Type	Hunting Query
Solution	Microsoft 365
ID	3d6d0c04-7337-40cf-ace6-c471d442356d
Tactics	InitialAccess
Techniques	T1566
Required Connectors	Office365
Source	View on GitHub

Tables Used

This content item queries data from the following tables:

Table	Selection Criteria	Transformations	Ingestion API	Lake-Only
OfficeActivity	OfficeWorkload == "MicrosoftTeams" RecordType == "SharePointFileOperation"	✓	✗	?

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