Creates a scheme called helper://
Then does things.
Normal users can register and call their own schemes.
Also above I show how to enumerate schemes...
Created
November 29, 2025 17:18
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Custom URI / Schemes
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| ### --- PART 1: LIST ALL REGISTERED URL SCHEMES --- ### | |
| Write-Host "Registered URL Schemes (from HKCU + HKLM):`n------------------------" | |
| # Per-user schemes | |
| $schemesUser = Get-ChildItem "HKCU:\Software\Classes" | | |
| Where-Object { | |
| ($_ | Get-ItemProperty -ErrorAction SilentlyContinue)."(Default)" -match "URL:" ` | |
| -and (Get-ItemProperty $_.PSPath -ErrorAction SilentlyContinue)."URL Protocol" -ne $null | |
| } | |
| # System-wide schemes | |
| $schemesSystem = Get-ChildItem "HKLM:\Software\Classes" | | |
| Where-Object { | |
| ($_ | Get-ItemProperty -ErrorAction SilentlyContinue)."(Default)" -match "URL:" ` | |
| -and (Get-ItemProperty $_.PSPath -ErrorAction SilentlyContinue)."URL Protocol" -ne $null | |
| } | |
| $schemes = $schemesUser + $schemesSystem | |
| foreach ($s in $schemes) { | |
| Write-Host $s.PSChildName | |
| } | |
| Write-Host "`nTotal Schemes Found: $($schemes.Count)" | |
| ### --- PART 2: REGISTER helper:// PROTOCOL (Per-User) --- ### | |
| $protocolRoot = "HKCU:\Software\Classes\helper" | |
| # Path to your application EXE (modify to your real path) | |
| # Create some sample code to practice signing on | |
| Add-Type -TypeDefinition @' | |
| public class Foo { | |
| public static void Main(string[] args) { | |
| System.Console.WriteLine("Hello, Darkness My Old Friend!"); | |
| System.Console.ReadKey(); | |
| } | |
| } | |
| '@ -OutputAssembly C:\Tools\HelloDarknessMyOldFriend.exe | |
| $AppPath = "C:\Tools\HelloDarknessMyOldFriend.exe" | |
| # URL argument "%1" gets passed to the EXE | |
| $Arguments = "`"%1`"" | |
| # Validate the EXE exists | |
| if (-not (Test-Path $AppPath)) { | |
| Write-Host "ERROR: Application not found at $AppPath" -ForegroundColor Red | |
| return | |
| } | |
| # Create protocol root and keys | |
| New-Item -Path $protocolRoot -Force | Out-Null | |
| Set-ItemProperty -Path $protocolRoot -Name "(Default)" -Value "URL:Helper Protocol" | |
| Set-ItemProperty -Path $protocolRoot -Name "URL Protocol" -Value "" | |
| # Create open command structure | |
| New-Item -Path "$protocolRoot\shell" -Force | Out-Null | |
| New-Item -Path "$protocolRoot\shell\open" -Force | Out-Null | |
| New-Item -Path "$protocolRoot\shell\open\command" -Force | Out-Null | |
| # Final command line | |
| $command = "`"$AppPath`" $Arguments" | |
| Set-ItemProperty -Path "$protocolRoot\shell\open\command" -Name "(Default)" -Value $command | |
| Write-Host "`nRegistered protocol 'helper://' successfully!" -ForegroundColor Green | |
| Write-Host "Command used: $command" | |
| Start-Process "helper://test" | |
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