PatchExtract.ps1 by Greg Linares (@Laughing_Mantis)

<#
================
PATCHEXTRACT.PS1
=================
Microsoft MSU Patch Extraction and Patch OrganizationUtility by Greg Linares (@Laughing_Mantis)

This Powershell script will extract a Microsoft MSU update file and then organize the output of extracted files and folders.

Organization of the output files is based on the patch's files and will organize them based on their archicture (x86, x64, or wow64)
as well as their content-type, ie: resource and catalog files will be moved to a JUNK subfolder and patch binaries and index files will
goto a PATCH folder.

This script was developed in order to aid reverse engineers in quickly organizing patches so they can be binary diffed faster and easier.
This was especially developed with the new bulk Microsoft Kernel patches in mind.

Example output folder structure ouput would be similar to this:

C:\PATCHES\MS15-XXX\PRE
    -x86
        - x86 Binary patched files
    -x64
        - x64 binary patched files
    -WOW64
        - syswow64 binary patched files
    -JUNK
        - resource, catalog, mum, and other non-binary based patched files
    -PATCH
        - original patch, cabs and xml files from the extraction


=============
REQUIREMENTS
=============
'expand.exe' to be present in %WINDIR%\SYSTEM32 (it is by default) - It will execute this file @ the current users permissions
A valid Microsoft MSU patch file to extract (PATCH variable)
Directory and File write/creation permissions to the PATH folder specified


=======
USAGE
=======

Powershell -ExecutionPolicy Bypass -File PatchExtract.ps1 -Patch C:\Patches\Windows6.1-KB3088195-x64.msu -Path C:\Patches\MS15-XXX\POST\


This would extract the patch file C:\Patches\Windows6.1-KB3088195-x64.msu to the folder C:\Patches\MS15-XXX\POST\.
It will then create all the sub organization folders within C:\Patches\MS15-XXX\POST\ folder.

(Note: the optional Powershell parameters '-ExecutionPolicy Bypass' is necessary in some environments to overcome Powershell execution restrictions)

==========
ARGUMENTS
==========
-PATCH <STRING:Filename> [REQUIRED] [NO DEFAULT]
    Specifies the MSU file that will be extracted to the specified PATH folder and then organized into the x86, x64, WOW, JUNK, and BIN folders specified
    Extract command will be "expand -F:* <PATCH> <PATH>"
    Non MSU files have not been tested however if the extraction does not generate a CAB file of the same name (indicator of successful extraction of MSU files)
    the script assumes extraction failed.

-PATH <STRING:FolderPath> [REQUIRED] [NO DEFAULT]
    Specified the folder that the PATCH file will be extracted and organized into
    If the specified folders does not exist yet, the user will be prompted if they want to create it.
    Relative paths '.\POST' can be used but it has not extensively been tested.


-x86 <STRING:Foldername> [OPTIONAL] [DEFAULT='x86']

    Specifies the folder name within $PATH to store x86 patch binaries
    example: -x86 32bit


-x64 <STRING:Foldername> [OPTIONAL] [DEFAULT='x64']

    Specifies the folder name within $PATH to store x64 patch binaries
    example: -x64 64bit

-WOW <STRING:Foldername> [OPTIONAL] [DEFAULT='WOW64']

    Specifies the folder name within $PATH to store wow64 type patch binaries
    example: -WOW sysWOW64

-JUNK <STRING:Foldername> [OPTIONAL] [DEFAULT='JUNK']

    Specifies the folder name within $PATH to store resource, catalog, and other generally useless for diffing patch binaries
    example: -JUNK res


-BIN <STRING:Foldername> [OPTIONAL] [DEFAULT='PATCH']

    Specifies the folder name within $PATH to store extraction xml and original patch msu and cab files
    example: -BIN bin


================
VERSION HISTORY
================
I originally wrote this as an ugly batch file sometime between 2014 and 2015 as a way to organize folders but it was incomplete and buggy

Oct 15, 2015 - Initial Public Release 1.0



==========
LICENSING
==========
This script is provided free as beer.  It probably has some bugs and coding issues, however if you like it or find it useful please give me a shout out on twitter @Laughing_Mantis.
Feedback is encouraged and I will be likely releasing new scripts and tools and training in the future if it is welcome.


-GLin

#>




Param
(

    [Parameter(ValueFromPipelineByPropertyName = $true)]
    [ValidateNotNullOrEmpty()]
    [string]$PATCH = "",

    [Parameter(ValueFromPipelineByPropertyName = $true)]
    [ValidateNotNullOrEmpty()]
    [string]$PATH = "",

    [Parameter(ValueFromPipelineByPropertyName = $true)]
    [string]$x86 = "x86",

    [Parameter(ValueFromPipelineByPropertyName = $true)]
    [string]$x64 = "x64",

    [Parameter(ValueFromPipelineByPropertyName = $true)]
    [string]$WOW = "WOW64",

    [Parameter(ValueFromPipelineByPropertyName = $true)]
    [string]$JUNK = "JUNK",

    [Parameter(ValueFromPipelineByPropertyName = $true)]
    [string]$BIN = "PATCH"

)

Clear-Host

if ($PATCH -eq "")
{
    Throw ("Error: No PATCH file specified.  Specify a valid Microsoft MSU Patch with the -PATCH argument")

}

if ($PATH -eq "")
{
    Throw ("Error: No PATH folder specified.  Specify a folder name to extract $PATCH to using the -PATH argument")

}

#Bug Fix (Resolve-Path Error if invalid path was specified before the path was created)


if (!(Test-Path $PATCH))
{
    Throw ("Error: Specified PATCH file ($PATCH) does not exist.  Specify a valid Microsoft MSU Patch file with the -PATCH argument.")
}

if (!($PATCH.ToUpper().EndsWith(".MSU")))
{
    Do
    {
        $Attempt = Read-Host ("Warning: Specified PATCH file ($PATCH) is not a MSU file type. Do you still want to attempt extraction? [Y] or [N]")
    }
    Until ('Y', 'y', 'n', 'N' -ccontains $Attempt)
    if ($Attempt.ToUpper() -eq 'N')
    {
        Write-Host ("Exiting...")
        Exit
    }
}

if (!(Test-Path $PATH))
{
    Do
    {
        $Attempt = Read-Host ("Warning: Specified PATH folder ($PATH) does not exist. Do you want to create it? [Y] or [N]")
    }
    Until ('Y', 'y', 'n', 'N' -ccontains $Attempt)
    if ($Attempt.ToUpper() -eq 'N')
    {
        Write-Host ("Exiting...")
        Exit
    }
    else
    {
        New-Item $PATH -Force -ItemType Directory
        Write-Host "Created $PATH Folder" -ForegroundColor Green
    }
}

$PATCH = Resolve-Path $PATCH
$PATH = Resolve-Path $PATH

Write-Host "Patch to Extract: $PATCH"
Write-Host "Extraction Path: $PATH"
Write-Host "x86 File Storage Folder Name: $x86"
Write-Host "x64 File Storage Folder Name: $x64"
Write-Host "WOW64 File Storage Folder Name: $WOW"
Write-Host "Junk File Storage Folder Name: $JUNK"
Write-Host "Orignal Patch File Storage Folder Name: $BIN"

$SYSPATH = Join-Path -path (get-item env:\windir).Value -ChildPath "system32"

$EXPAND = Join-Path -path $SYSPATH -ChildPath "expand.exe"


if (!(Test-Path $EXPAND))
{
    Throw ("Error: Cannot find 'Expand.exe' in the $SYSPATH folder.")
}

$ARG = "-F:* " + $PATCH + " " + $PATH

Write-Host "Executing the following command: $EXPAND $ARG" -ForegroundColor Green

Start-Process -File $EXPAND -ArgumentList $ARG -Wait

$CAB = Join-Path -path $PATH -ChildPath $((Get-ChildItem $PATCH).Basename + ".CAB")

if (!(Test-Path $CAB))
{
    Throw "Error: Patch .CAB File ($CAB) does not exist.  Patch Extraction failed"
}

$ARG = " -F:* " + $CAB + " " + $PATH

Write-Host "Executing the following command: $EXPAND $ARG" -ForegroundColor Green

Start-Process -File $EXPAND -ArgumentList $ARG -Wait


$PATCHx86 = Join-Path -path $PATH -ChildPath $x86
$PATCHx64 = Join-Path -path $PATH -ChildPath $x64
$PATCHWOW = Join-Path -path $PATH -ChildPath $WOW
$PATCHJUNK = Join-Path -path $PATH -ChildPath $JUNK
$PATCHCAB = Join-Path -path $PATH -ChildPath $BIN


if (!(Test-Path $PATCHx86 -pathType Container))
{
    New-Item $PATCHx86 -Force -ItemType Directory
    Write-Host "Making $PATCHx86 Folder" -ForegroundColor Green
}

if (!(Test-Path $PATCHx64 -pathType Container))
{
    New-Item $PATCHx64 -Force -ItemType Directory
    Write-Host "Making $PATCHx64 Folder" -ForegroundColor Green
}

if (!(Test-Path $PATCHWOW -pathType Container))
{
    New-Item $PATCHWOW -Force -ItemType Directory
    Write-Host "Making $PATCHWOW Folder" -ForegroundColor Green
}

if (!(Test-Path $PATCHJUNK -pathType Container))
{
    New-Item $PATCHJUNK -Force -ItemType Directory
    Write-Host "Making $PATCHJUNK Folder" -ForegroundColor Green
}

if (!(Test-Path $PATCHCAB -pathType Container))
{
    New-Item $PATCHCAB -Force -ItemType Directory
    Write-Host "Making $PATCHCAB Folder" -ForegroundColor Green
}


$PATCHFolders = Get-ChildItem -Path $PATH -Force -ErrorAction SilentlyContinue | where {$_.Attributes -eq 'Directory'}

foreach ($folder in $PATCHFolders)
{
    if ($folder.Name.Contains(".resources_"))
    {
        Move-Item $folder.FullName $PATCHJUNK -Force
        Write-Host "Moving $folder to $PATCHJUNK" -ForegroundColor Green
        Continue
    }
    else
    {
        if ($folder.Name.StartsWith("x86_"))
        {
            Move-Item $folder.FullName $PATCHx86 -Force
            Write-Host "Moving $folder to $PATCHx86" -ForegroundColor Green
            Continue
        }

        if ($folder.Name.StartsWith("amd64_"))
        {
            Move-Item $folder.FullName $PATCHx64 -Force
            Write-Host "Moving $folder to $PATCHx64" -ForegroundColor Green
            Continue
        }

        if ($folder.Name.StartsWith("wow64_"))
        {
            Move-Item $folder.FullName $PATCHWOW -Force
            Write-Host "Moving $folder to $PATCHWOW" -ForegroundColor Green
            Continue
        }
    }
}

$Junkfiles = Get-ChildItem -Path $PATH -Force -ErrorAction SilentlyContinue


foreach ($JunkFile in $Junkfiles)
{

    try
    {
        if (($JunkFile.Name.EndsWith(".manifest")) -or ($JunkFile.Name.EndsWith(".cat")) -or ($JunkFile.Name.EndsWith(".mum")))
        {
            Move-Item $JunkFile.FullName $PATCHJUNK -Force -ErrorAction SilentlyContinue
            Write-Host "Moving $JunkFile to $PATCHJUNK" -ForegroundColor Green
            Continue
        }

        if (($JunkFile.Name.EndsWith(".cab")) -or ($JunkFile.Name.EndsWith(".xml")) -or ($JunkFile.Name.EndsWith(".msu")) -or ($JunkFile.Name.EndsWith("pkgProperties.txt")))
        {
            Move-Item $JunkFile.FullName $PATCHCAB -Force -ErrorAction SilentlyContinue
            Write-Host "Moving $JunkFile to $PATCHCAB" -ForegroundColor Green
            Continue
        }
        if ($JunkFile.Name -eq "patch")
        {
            Move-Item $JunkFile.FullName $PATCHCAB -Force -ErrorAction SilentlyContinue
            Write-Host "Moving $JunkFile to $PATCHCAB" -ForegroundColor Green
            Continue
        }
    }
    catch
    {
        Write-Host "Error Processing ($JunkFile.Fullname)" -ForegroundColor Red
    }
}