Shared/Get-KernelModeDrivers.psm1
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Function Get-KernelModeDrivers { <# .SYNOPSIS Gets the path of all of the kernel-mode drivers from the system .DESCRIPTION The output of this function is completely based on the ConfigCI module's workflow. It checks the same locations that the ConfigCI checks for .sys files and kernel-mode DLLs It even returns the same kernel-mode dll files from System32 folder that the (Get-SystemDriver -ScanPath 'C:\Windows\System32') command does The output of the function can only contain DLL and SYS files .NOTES If not parameter is used, the function scans the local system for drivers .PARAMETER Directory The directory paths to scan for kernel-mode drivers .PARAMETER File The file paths to scan for kernel-mode drivers .INPUTS System.IO.DirectoryInfo[] System.IO.FileInfo[] .OUTPUTS System.String[] #> [CmdletBinding()] [OutputType([System.String[]])] Param ( [ValidateScript({ [System.IO.Directory]::Exists($_) })] [Parameter(Mandatory = $False)][System.IO.DirectoryInfo[]]$Directory, [ValidateScript({ [System.IO.File]::Exists($_) })] [Parameter(Mandatory = $False)][System.IO.FileInfo[]]$File ) Begin { # Import the ConfigCI assembly resources if they are not already imported if (-NOT ('Microsoft.SecureBoot.UserConfig.ImportParser' -as [System.Type]) ) { [WDACConfig.Logger]::Write('Importing the ConfigCI assembly resources') Add-Type -Path ([System.String](PowerShell.exe -NoProfile -Command { (Get-Command -Name Merge-CIPolicy).DLL })) } Function Test-UserPE { <# .SYNOPSIS This function tests if a DLL is a user-mode PE by inspecting its imports #> Param ( [AllowNull()] [System.String[]]$Imports ) if ($null -eq $Imports) { return $False } # If any of these DLLs are found in the imports list, the method return true, indicating that the file is likely a user-mode PE elseif (($Imports -icontains 'kernel32.dll') -or ($Imports -icontains 'kernelbase.dll') -or ($Imports -icontains 'mscoree.dll') -or ($Imports -icontains 'ntdll.dll') -or ($Imports -icontains 'user32.dll')) { return $true } else { return $False } } function Get-FolderDllKernelDrivers { <# .SYNOPSIS Gets the kernel drivers from a directory or file #> [OutputType([System.String[]], [System.Boolean])] param ( [Parameter(Mandatory = $False)] [System.IO.DirectoryInfo]$Directory, [System.IO.FileInfo]$File ) if ($Directory) { [System.Collections.Generic.List[System.String]]$DllKernelDrivers = @() foreach ($File in ([WDACConfig.FileUtility]::GetFilesFast($Directory, $null, '.dll'))) { $HasSIP = $False $IsPE = $False $Imports = [Microsoft.SecureBoot.UserConfig.ImportParser]::GetImports($File.FullName, [ref]$HasSIP, [ref]$IsPE) if ($HasSIP -and -not (Test-UserPE -Imports $Imports)) { $DllKernelDrivers.Add($File.FullName) } } return $DllKernelDrivers } elseif ($File) { $HasSIP = $False $IsPE = $False $Imports = [Microsoft.SecureBoot.UserConfig.ImportParser]::GetImports($File.FullName, [ref]$HasSIP, [ref]$IsPE) if ($HasSIP -and -not (Test-UserPE -Imports $Imports)) { Return $true } } } # Final output variable that includes all kernel-mode driver files $DriverFiles = [System.Collections.Generic.HashSet[System.String]]@() # List of all potential DLL files $PotentialKernelModeDlls = [System.Collections.Generic.HashSet[System.String]]@() # This is only used to display extra info $KernelModeDlls = [System.Collections.Generic.HashSet[System.String]]@() } Process { # If directory paths were passed by user, add them all to the paths to be scanned if ($null -ne $PSBoundParameters['Directory']) { # Get the .sys files from the directories foreach ($Item in [WDACConfig.FileUtility]::GetFilesFast($PSBoundParameters['Directory'], $null, '.sys')) { [System.Void]$DriverFiles.Add($Item) } # Get all of the .dll files from the user-selected directories foreach ($Item in [WDACConfig.FileUtility]::GetFilesFast($PSBoundParameters['Directory'], $null, '.dll')) { [System.Void]$PotentialKernelModeDlls.Add($Item) } } # If file paths were passed by the user elseif ($null -ne $PSBoundParameters['File']) { foreach ($FilePath in $PSBoundParameters['File']) { Switch (($FilePath).Extension) { '.sys' { [System.Void]$DriverFiles.Add($FilePath) break } '.dll' { if (Get-FolderDllKernelDrivers -File $FilePath) { [System.Void]$DriverFiles.Add($FilePath) break } } } } # Return from the process block after all the user-provided files have been processed return } # If no parameters were passed, scan the system for kernel-mode drivers else { # Since there can be more than one folder due to localizations such as en-US then from each of the folders, the bootres.dll.mui file is added Foreach ($Path in Get-ChildItem -Directory -Path "$env:SystemDrive\Windows\Boot\Resources") { [System.Void]$DriverFiles.Add("$Path\bootres.dll.mui") } # Get all of the .dll files from the system32 directory foreach ($Item in [WDACConfig.FileUtility]::GetFilesFast("$env:SystemRoot\System32", $null, '.dll')) { [System.Void]$PotentialKernelModeDlls.Add($Item) } # Get the .sys files from the System32 directory foreach ($Item in [WDACConfig.FileUtility]::GetFilesFast("$env:SystemRoot\System32", $null, '.sys')) { [System.Void]$DriverFiles.Add($Item) } } [WDACConfig.Logger]::Write("Number of sys files: $($DriverFiles.Count)") [WDACConfig.Logger]::Write("Number of potential kernel-mode DLLs: $($PotentialKernelModeDlls.Count)") # Scan all of the .dll files to see if they are kernel-mode drivers foreach ($KernelDll in $PotentialKernelModeDlls) { if (Get-FolderDllKernelDrivers -File $KernelDll) { [System.Void]$KernelModeDlls.Add($KernelDll) [System.Void]$DriverFiles.Add($KernelDll) } } [WDACConfig.Logger]::Write("Number of kernel-mode DLLs folder: $($KernelModeDlls.Count)") } End { [WDACConfig.Logger]::Write("Returning $($DriverFiles.Count) kernel-mode driver file paths") Return $DriverFiles } } Export-ModuleMember -Function 'Get-KernelModeDrivers' |