IDAT Loader Execution via PowerShell Running update.ps1 from WindowsApps (via process_creation)

ATT&CK techniques

Execution

Recon
Resource Dev
Initial Access
Execution
- T1059.001PowerShell
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects PowerShell executing an update.ps1 script located under the WindowsApps directory, the delivery behavior of the MSIX-packaged IDAT loader variant that runs a malicious script from within an installed app package. Adversaries leverage a signed MSIX container and a legitimate script wrapper to launch their loader from a trusted install path, making early detection critical for catching the intrusion before the next-stage payload is downloaded.

Reporting behind it

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IDAT Loader Execution via PowerShell Running update.ps1 from WindowsApps (via process_creation)

Pivot detection · T1059.001 · 9 related

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