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v2026.10.13.001: keep Windows Admin Center's tasks on Azure VMs - #9
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The Process Engine deleted WindowsAdminCenterHeartbeatCheck and WindowsAdminCenterTroubleshootTask on its first run on an Azure Virtual Desktop session host: both run PowerShell -WindowStyle Hidden from the Azure extension folder, which the obfuscation check matches. Commands run from \Packages\Plugins\Microsoft.AdminCenter.AdminCenter\ are now in LegitTaskPaths; hidden or encoded PowerShell from anywhere else is still removed. New tests/Test-LegitTasks.ps1 fails on v2026.09.25.003 and passes. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Why
On its first run on an Azure Virtual Desktop session host, the Process Engine deleted two Microsoft scheduled tasks,
WindowsAdminCenterHeartbeatCheckandWindowsAdminCenterTroubleshootTask, and reported them as High IOCs. Both belong to Windows Admin Center's Azure VM extension and run:Powershell.exe -WindowStyle Hidden -File "C:\Packages\Plugins\Microsoft.AdminCenter.AdminCenter\0.76.0.0\Sme.VmExtension\..."-WindowStyle Hiddenmatches the scheduled-task obfuscation pattern, and nothing inLegitTaskPathscovered them.What
LegitTaskPathsgains*\Packages\Plugins\Microsoft.AdminCenter.AdminCenter\*. It is limited to this one extension; other folders underC:\Packages\Plugins\are still checked.tests/Test-LegitTasks.ps1: takesLegitTaskPathsand the obfuscation pattern from the script and checks that the real WAC command lines (and a later extension version) are kept, while hidden or encoded PowerShell from anywhere else, including another extension folder, is still removed. It fails on currentmain(3 assertions) and passes here.Testing
tests/Test-*.ps1pass under pwsh 7.5 on macOS; the script parses; UTF-8 BOM and LF line endings preserved.After merge
Once the session host has run this version, repair the Windows Admin Center extension for that VM in the Azure portal to recreate the two tasks. Before then, a repair would be undone at the next run.
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