ASR Bypassing Writing Executable Content

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The query checks for any file which has been created/written by an Office application and shortly after renamed to one of the deny-listed "executable extensions" which are text files. (e.g. ps1, .js, .vbs).

Attribute Value
Type Analytic Rule
Solution FalconFriday
ID efe4efef-5ca7-4b51-a53e-0e96492ce97a
Severity Medium
Status Available
Kind Scheduled
Tactics DefenseEvasion
Techniques T1211
Required Connectors MicrosoftThreatProtection
Source View on GitHub

Tables Used

This content item queries data from the following tables:

Table Selection Criteria Transformations Ingestion API Lake-Only
DeviceFileEvents ActionType == "FileRenamed" ?

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