slow_and_sneaky_process_list.ps1

# Sneaky process listing.
function Get-FilePids {
    [Parameter(Mandatory, Position = 0)]
    Param($Path)

    try {
        Use-NtObject($file = Get-NtFile -Win32Path $Path -Access ReadAttributes) {
            $file.GetUsingProcessIds() | Write-Output
        }
    } catch {
        Write-Error $_
    }
}

$exes = ls $env:windir -Recurse -Filter *.exe -ErrorAction Ignore
foreach($exe in $exes) {
    $pids = Get-FilePids -Path $exe.FullName
    foreach($p in $pids) {
        $props = @{
            Path = $exe.FullName;
            Name = $exe.Name;
            ProcessId = $p;
        }
        New-Object -TypeName PSObject -Property $props | Write-Output
    }
}