GPO Magnifier

Ecrit par @mickyballadelli

GPO Magnifier est un outil en Powershell à interface graphique qui permet d’analyser des Group Policy Objects (GPO) d’après les best practice, et génère des scripts pour corriger les erreurs trouvées.

Cet outil génère également un fichier CSV avec les résultats de l’analyse.

L’outil vérifie:

Les GPO sans liens associés
Les liens désactivés
Les GPO vides
Les GPO activées sans paramètres
Les GPOs activées avec des filtres WMI (dans ce cas des informations supplémentaires sont ajoutées comme l’auteur ainsi que le contenu du filtre)
Les GPO sans propriétaire associé ou un propriétaire tombstone.

Utilisation:

Renseigner le nom du domaine à analyser
Optionnellement renseigner le nom d’un DC pour la connexion
Cliquer sur Check
Cliquer Export pour générer le fichier CSV
Cliquer sur Find it pour générer les scripts de remédiation.

#========================================================================
# GPO Magnifier Tool
# Created by: Micky Balladelli
#
# This script goes through all the GPOs in a domain and verifies them according to
# best practices.
# 
# It checks:
#    - Unlinked GPOs
#    - GPO links that are disabled
#	 - Disabled GPO
#	 - Empty GPOs
#	 - Enabled GPOs without settings
#	 - WMI filters used in GPOs, WMI filter info is retrieved such as name, author, and code
#	 - GPOs with tombstone owners
#
#
# Usage:
#
#	1. Enter the name of the domain you want to check in the domain text box 
#   (defaults to the current domain)
#	2. Enter a server if you want to query a particular domain controller [optional]
#   Click Check
#
#   3. A result is displayed in the output text window. 
#
#	4. Click on Export to CSV if you want to export the results found
#
#   5. Click on Find, to generate a powershell script with the fixes.
#	   Note that not all issues are fixed:
#       a. Empty GPOs will be removed
#		b. GPO without links will be removed
#		c. Disabled links will be deleted
#	   	d. Empty User configuration settings will set the GPO status accordingly
#	   	e. Empty Computer configuration settings will set the GPO status accordingly
#
# Disclaimer: code is provided as is, without support. Use at your own risk.
#
#========================================================================
 
# Import the necessary modules
try
{
	import-module grouppolicy -ErrorAction Stop
}
catch
{
	# the grouppolicy module requires at least Windows 7 or Windows Server 2008.
	[System.Windows.Forms.MessageBox]::Show(<a href="about:blank">$_</a>.Exception.Message, "Error")| Out-Null
}
 
#define a newline variable, it will be handy in the multiline textbox
$nl = "`r`n"
 
# save the location of the current script
$scriptpath = $MyInvocation.MyCommand.Path
$dir = Split-Path $scriptpath
 
#region Import the Assemblies
[reflection.assembly]::loadwithpartialname("System.Windows.Forms") | Out-Null
[reflection.assembly]::loadwithpartialname("System.Drawing") | Out-Null
#endregion
 
 
$FormEvent_Load= 
{
	[System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms") | Out-Null
}
 
function Report-GPO
{
	Param($GPO, $GPOreport, [string]$issue, $issueID, $WMI)
 
	$linkArray = @()
	$disLinkArray = @()
 
	foreach($link in $GPOReport.GPO.LinksTo)
	{
		if ($link -ne $null)
		{
			if ($link.Enabled -eq $true)
			{
				$linkArray+= $link.SOMPath
			}
			else
			{
				$disLinkArray+= $link.SOMPath
			}
		}
	}
 
	$linkString = "$linkArray"
	$disLinkString = "$disLinkArray"
 
 
	$retReport = New-Object -TypeName PSCustomObject -Property @{
			                    Name              = $GPO.Displayname;
								Links			  = $linkString;
								DisabledLinks	  = $disLinkString;
								DisabledLinkArray = $disLinkArray;
								GUID			  = $GPO.Id;
								IssueFound		  = $issue;
								IssueID			  = $issueID;
								CreationTime	  = $GPO.CreationTime;
								ModificationTime  = $GPO.ModificationTime;
			                    GPOStatus         = $GPO.GpoStatus;
			                    WMIFilter         = $GPO.WMIFilter.Name;
			                    WMIdata		      = $WMI;
								Owner	 		  = $GPO.Owner;
								Description		  = $GPO.Description;
			                    Path              = $GPO.Path
			                } 
	return $retReport
}
 
# the following function's code is from Glenn Sizemore to convert a CN to DN
function ConvertFrom-Canonical 
{
	param([string]$canoincal=(throw '$Canonical is required!'))
 
	$obj = $canoincal.Replace(',','\,').Split('/')
    [string]$DN = "CN=" + $obj[$obj.count - 1]
 
	for ($i = $obj.count - 2;$i -ge 1;$i--){$DN += ",OU=" + $obj[$i]}
    $obj[0].split(".") | ForEach-Object { $DN += ",DC=" + <a href="about:blank">$_</a>}
    return $dn
}
 
$form = New-Object System.Windows.Forms.Form
 
#Get AD Domain
$DomainDNS = [System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain().Name
 
$btnFind_OnClick= 
{
	$text = $textOut.Text
 
	if ( $text.Length -eq 0 )
	{
	    [System.Windows.Forms.MessageBox]::Show("Nothing to fix", "Error")| Out-Null 
		return
	}
 
	$dialog = New-Object System.Windows.Forms.SaveFileDialog
    $dialog.Filter = "All Files (*.ps1)|*.ps1"
    $dialog.ShowHelp = $true
	$dialog.InitialDirectory = $dir
    $dialog.Title = "Save script to file"
    $res = $dialog.ShowDialog()
 
	if ($res -eq "OK")
	{
		$fileout = $dialog.FileName
		$textOut.AppendText("Generating script...")
		$textOut.AppendText($nl)
 
		# Create the file
		"# File generated by GPO Magnifier tool."| Out-File -FilePath $fileout
		"import-module grouppolicy -ErrorAction Stop" | Out-File -FilePath $fileout -Append
		$nl | Out-File -FilePath $fileout -Append
 
		# Generate the script
		# Start by doing the "light stuff", i.e. anything that is not removing the GPO
		ForEach ($element in $report) 
		{
			switch ($element.IssueID)
			{
				# Remove disabled Links
				"2"
				{
					foreach($link in $element.DisabledLinkArray)
					{
						if ($link -ne $null)
						{
							if ($link.Enabled -eq $false)
							{
								"# `""+$element.Name+"`""+" disabled link "+ $DN + " will be removed" | Out-File -FilePath $fileout -Append
								("Remove-GPLink -guid "+$element.guid+" -target "+"`""+$DN+"`"") | Out-File -FilePath $fileout -Append
								$nl | Out-File -FilePath $fileout -Append
								$DN = ConvertFrom-Canonical($element.DisabledLinks)
								$textOut.AppendText("`""+$element.Name+"`""+" disabled link "+ $DN + " will be removed")
								$textOut.AppendText($nl)
								$textOut.AppendText("Remove-GPLink -guid "+$element.guid+" -target "+"`""+$DN+"`"")
								$textOut.AppendText($nl)
							}
						}
					}
 
				}
 
				# Computer settings disabled
				"3"
				{
					"# `""+$element.Name+"`""+" status will change from " + $element.GPOStatus +" to ComputerSettingsDisabled"| Out-File -FilePath $fileout -Append
					"(get-gpo -guid "+$element.guid+").gpostatus = `"ComputerSettingsDisabled`"" | Out-File -FilePath $fileout -Append
					$nl | Out-File -FilePath $fileout -Append
					$textOut.AppendText("`""+$element.Name+"`""+" status will change from " + $element.GPOStatus +" to ComputerSettingsDisabled")
					$textOut.AppendText($nl)
					$textOut.AppendText("(get-gpo -guid "+$element.guid+").gpostatus = `"ComputerSettingsDisabled`"")
					$textOut.AppendText($nl)
				}
 
				# User settings disabled
				"4"
				{
					"# `""+$element.Name+"`""+" status will change from " + $element.GPOStatus +" to UserSettingsDisabled"| Out-File -FilePath $fileout -Append
					"(get-gpo -guid "+$element.guid+").gpostatus = `"UserSettingsDisabled`"" | Out-File -FilePath $fileout -Append
					$nl | Out-File -FilePath $fileout -Append
					$textOut.AppendText("`""+$element.Name+"`""+" status will change from " + $element.GPOStatus +" to UserSettingsDisabled")
					$textOut.AppendText($nl)
					$textOut.AppendText("(get-gpo -guid "+$element.guid+").gpostatus = `"UserSettingsDisabled`"")
					$textOut.AppendText($nl)
				}
 
				default
				{
				   # do nothing
				}
			}
 
		}
 
		# Now generate all the remove GPO scripts
		ForEach ($element in $report) 
		{
			switch ($element.IssueID)
			{
				# Remove the GPO
				"1"
				{
					"# `""+$element.Name+"`""+" will be deleted. " + $element.IssueFound| Out-File -FilePath $fileout -Append
					"remove-gpo -guid " + $element.guid | Out-File -FilePath $fileout -Append 
					$nl | Out-File -FilePath $fileout -Append
 
					$textOut.AppendText("`""+$element.Name+"`""+" will be deleted. " + $element.IssueFound)
					$textOut.AppendText($nl)
					$textOut.AppendText("remove-gpo -guid "+$element.guid)
					$textOut.AppendText($nl)
				}
			}
		}
	}
}
$btnSave_OnClick= 
{
 
	$text = $textOut.Text
 
	if ( $text.Length -eq 0 )
	{
	    [System.Windows.Forms.MessageBox]::Show("Nothing to save", "Error")| Out-Null 
		return
	}
    $dialog = New-Object System.Windows.Forms.SaveFileDialog
    $dialog.Filter = "All Files (*.csv)|*.csv"
    $dialog.InitialDirectory = $dir
    $dialog.ShowHelp = $true
    $dialog.Title = "Save Audit to file"
    $res = $dialog.ShowDialog()
 
	if ($res -eq "OK")
	{
		$fileout = $dialog.FileName
 
		$report |
	 	 Select-Object Name, IssueFound, Links, DisabledLinks, GPOStatus, CreationTime, ModificationTime, WMIFilter, WMIdata, Owner, Path | Export-CSV $fileout -NoTypeInformation
 
	}
}
 
$btnCheck_OnClick= 
{
	$domainName = $textDomain.Text
	$serverName = $textServer.Text
	$report = @()
	$GPOPolicies = @()
	$textOut.Text = ""
	[Int32]$count = 0;
 
	# Get all GPOs from the given domain
	try
	{
		if ($serverName.Length -eq 0)
		{
			[array]$GPOPolicies = Get-GPO -domain $domainName -All
		}
		else
		{ 
			[array]$GPOPolicies = Get-GPO -domain $domainName -server $serverName -All
		}
 
	}
	catch
	{
	    [System.Windows.Forms.MessageBox]::Show(<a href="about:blank">$_</a>.Exception.Message, "Error")| Out-Null 
		return
	}
 
	ForEach ($GPO in $GPOPolicies) 
	{
		$status.Text = "Domain " + $domainName + " contains " + $GPOPolicies.Count + " GPOs. Retrieving GPO detailed information..." + $count + "/" + $GPOPolicies.Count
 
		if ($serverName.Length -eq 0)
		{
			[xml]$GPOReport = (get-gporeport -guid $GPO.Id -ReportType xml -Domain $domainName )
		}
		else
		{ 
			[xml]$GPOReport = (get-gporeport -guid $GPO.Id -ReportType xml -Domain $domainName -Server $serverName)
		}
 
		$count++;
 
		# test if the GPO's is linked
		if ($GPOReport.gpo.LinksTo -eq $null) 
		{		
			$report += Report-GPO $GPO $GPOReport "GPO has no links" 1
 
			# no point in checking the other points. This GPO is not used
			continue
		}
		else
		{
			# test if the GPO links are disabled
			if (-not (($GPOReport.GPO.LinksTo | Foreach {<a href="about:blank">$_</a>.Enabled}) -eq $true))
			{
				$report += Report-GPO $GPO $GPOReport "All GPO links are disabled" 1
			}	
			else
			{
				if (($GPOReport.GPO.LinksTo | Foreach {<a href="about:blank">$_</a>.Enabled}) -eq $false)
				{
					$report += Report-GPO $GPO $GPOReport "Some GPO links are disabled" 2
				}					
			}
		}
 
		# test if the GPO's has no settings
		if (!$GPOReport.gpo.Computer.ExtensionData -and !$GPOReport.GPO.User.ExtensionData)
		{
			$report += Report-GPO $GPO $GPOReport "GPO is empty" 1
 
			# no point in checking the other points. This GPO is empty
			continue
		}
		else
		{
			# test if the extension is empty and the GPO is enabled
			if (!$GPOReport.gpo.Computer.ExtensionData -and $GPO.GpoStatus -eq "ComputerSettingsEnabled")
			{
				$report += Report-GPO $GPO $GPOReport "Computer settings enabled without data" 3
			}
			if (!$GPOReport.gpo.Computer.ExtensionData -and $GPO.GpoStatus -eq "AllSettingsEnabled")
			{
				$report += Report-GPO $GPO $GPOReport "Computer settings enabled without data" 3
			}
			if (!$GPOReport.gpo.User.ExtensionData -and $GPO.GpoStatus -eq "UserSettingsEnabled")
			{
				$report += Report-GPO $GPO $GPOReport "User settings enabled without data" 4
			}
			if (!$GPOReport.gpo.User.ExtensionData -and $GPO.GpoStatus -eq "AllSettingsEnabled")
			{
				$report += Report-GPO $GPO $GPOReport "User settings enabled without data" 4
			}			
		}
 
		# test if the GPO is disabled
		if ($GPO.GpoStatus -eq "AllSettingsDisabled")
		{
			$report += Report-GPO $GPO $GPOReport "GPO is disabled" 1
		}	
 
		# test if the GPO's has a WMI filter
		$result = @{}
		if ($GPO.WMIFilter.Name.Length -gt 0)
		{
 
 
			# let's find what this filter does
 
			$wmiFilterAttr = "msWMI-Name", "msWMI-Parm1", "msWMI-Parm2", "msWMI-Author", "msWMI-ID"
 
		 	$search = New-Object System.DirectoryServices.DirectorySearcher([ADSI]("LDAP://" + $domainName))
			$wminame = $GPO.WMIFilter.Name
			$search.Filter = "(&amp;(objectClass=msWMI-Som)(msWMI-Name=$wminame))"
			$search.PropertiesToLoad.AddRange($wmiFilterAttr)
			$result = $search.FindOne()
			$WMI = New-Object -TypeName PSCustomObject -Property @{
						                    Name 	= [string]$result.Properties["mswmi-name"];
											Parm1	= [string]$result.Properties["mswmi-parm1"];
											Parm2	= [string]$result.Properties["mswmi-parm2"];
											Author  = [string]$result.Properties["mswmi-author"];
											ID	    = [string]$result.Properties["mswmi-ID"]
											}
 
			$report += Report-GPO $GPO $GPOReport "WMI filter found" 0 $WMI 
		}
 
		# test if the GPO's owner is a tumbstone
		$GPOowner =  $GPO.Owner | Out-String
 
		if ($GPOowner.Length -eq 0)
		{
			$report += Report-GPO $GPO $GPOReport "Owner not found" 0
		}
		else 
		{
			if ($GPOowner.StartsWith("S-") -eq $true)
			{
				$report += Report-GPO $GPO $GPOReport "Owner is a tombstone" 0
			}
		}
	}
	$status.Text = "Domain " + $domainName + " contains " + $GPOPolicies.Count + " GPOs. Analysis done"
 
	$textOut.AppendText(($report|Select-Object IssueFound, Name, Links, DisabledLinks, GUID, GPOStatus, WMIFilter, WMIdata, Description|Out-String))
	$textOut.AppendText($nl)
	$textOut.AppendText($report.Count) 
	$textOut.AppendText(" issues were found in a total of ") 
	$textOut.AppendText($GPOPolicies.Count) 
	$textOut.AppendText(" GPOs" )
	$textOut.AppendText($nl)
 
}
 
# Add a label
$label = New-Object System.Windows.Forms.Label
$label.Text = "Domain:"
$label.Location = New-Object System.Drawing.Point(3,5)
$label.Size = New-Object System.Drawing.Size(50, 20)
$form.Controls.Add($label)
 
# Add the domain input textbox
$textDomain = New-Object System.Windows.Forms.TextBox 
$textDomain.TabIndex = 1
$textDomain.Size = New-Object System.Drawing.Size(130, 30)
$textDomain.Text = "$DomainDNS"
$textDomain.Location = New-Object System.Drawing.Point(55, 3)
$form.Controls.Add($textDomain)
 
# Add another label
$label = New-Object System.Windows.Forms.Label
$label.Text = "Server:"
$label.Location = New-Object System.Drawing.Point(190,5)
$label.Size = New-Object System.Drawing.Size(50, 20)
$form.Controls.Add($label)
 
# Add the server input textbox
$textServer = New-Object System.Windows.Forms.TextBox 
$textServer.TabIndex = 2
$textServer.Size = New-Object System.Drawing.Size(130, 30)
$textServer.Location = New-Object System.Drawing.Point(238, 3)
$form.Controls.Add($textServer)
 
# Add the output text box
$textOut = New-Object System.Windows.Forms.TextBox 
$textOut.TabIndex = 6
$textOut.Size = New-Object System.Drawing.Size(605, 382)
$textOut.Location = New-Object System.Drawing.Point(1, 30)
$textOut.Multiline = $true
$textOut.ScrollBars = "Vertical"
$textOut.Font = "Courier New, 10pt"
$form.Controls.Add($textOut)
 
# Add the Check button
$btnCheck = New-Object System.Windows.Forms.Button
$btnCheck.TabIndex = 3
$btnCheck.Name = "btnCheck"
$btnCheck.Size = New-Object System.Drawing.Size(75,23)
$btnCheck.UseVisualStyleBackColor = $True
$btnCheck.Font = $FontSans825B 	
$btnCheck.Text = "Check"
$btnCheck.Location = New-Object System.Drawing.Point(370,3)
$btnCheck.DataBindings.DefaultDataSourceUpdateMode = 0
$btnCheck.add_Click($btnCheck_OnClick)
$form.Controls.Add($btnCheck)
 
# Add the Save button
$btnSave = New-Object System.Windows.Forms.Button
$btnSave.TabIndex = 4
$btnSave.Name = "btnSave"
$btnSave.Size = New-Object System.Drawing.Size(75,23)
$btnSave.UseVisualStyleBackColor = $True
$btnSave.Font = $FontSans825B 	
$btnSave.Text = "Export CSV"
$btnSave.Location = New-Object System.Drawing.Point(448,3)
$btnSave.DataBindings.DefaultDataSourceUpdateMode = 0
$btnSave.add_Click($btnSave_OnClick)
$form.Controls.Add($btnSave)
 
# Create the Find it button
$btnFind = New-Object System.Windows.Forms.Button
$btnFind.TabIndex = 5
$btnFind.Name = "btnFind"
$btnFind.Size = New-Object System.Drawing.Size(75,23)
$btnFind.UseVisualStyleBackColor = $True
$btnFind.Font = $FontSans825B 	
$btnFind.Text = "Find"
$btnFind.Location = New-Object System.Drawing.Point(526,3)
$btnFind.DataBindings.DefaultDataSourceUpdateMode = 0
$btnFind.add_Click($btnFind_OnClick)
$form.Controls.Add($btnFind)
 
# Create the statusBar
$statusStrip = new-object System.Windows.Forms.StatusStrip
$statusStrip.Location = new-object System.Drawing.Point(0, 463)
$statusStrip.Name = "statusStrip"
$statusStrip.Size = new-object System.Drawing.Size(664, 22);
 
$status = new-object System.Windows.Forms.ToolStripStatusLabel
$status.Text = ""
 
[void]$statusStrip.Items.add($status)
$form.Controls.Add($statusStrip)
 
 
# Set initial dialog size and title
$form.Size = New-Object System.Drawing.Size(620,475)
$form.Text = "GPO Magnifier Tool"
 
$OnResize = 
{
	$system_drawing_size = New-Object System.Drawing.Size
	$system_drawing_size.Width = $form.Width - 15
	$system_drawing_size.Height = $form.Height - 93
	$textOut.Size = $system_drawing_size
}
$form.add_Resize($OnResize)
 
# change that ugly default icon
$code = @"
using System;
using System.Drawing;
using System.Runtime.InteropServices;
 
namespace System
{
	public class IconExtractor
	{
		public static Icon Extract(string file, int number, bool largeIcon)
	 	{
			IntPtr large;
			IntPtr small;
			ExtractIconEx(file, number, out large, out small, 1);
			try
			{
	   			return Icon.FromHandle(largeIcon ? large : small);
	  		}
	  		catch
	  		{
	   			return null;
	  		}
 
	 	}
		[DllImport("Shell32.dll", EntryPoint = "ExtractIconExW", CharSet = CharSet.Unicode, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
		private static extern int ExtractIconEx(string sFile, int iIndex, out IntPtr piLargeVersion, out IntPtr piSmallVersion, int amountIcons);
 
	}
}
"@
 
Add-Type -TypeDefinition $code -ReferencedAssemblies System.Drawing | Out-Null
$form.Icon = [System.IconExtractor]::Extract("shell32.dll", 22, $true)
 
#Show the Form
$form.ShowDialog()| Out-Null

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#========================================================================

# GPO Magnifier Tool

# Created by: Micky Balladelli

# This script goes through all the GPOs in a domain and verifies them according to

# best practices.

# It checks:

# - Unlinked GPOs

# - GPO links that are disabled

# - Disabled GPO

# - Empty GPOs

# - Enabled GPOs without settings

# - WMI filters used in GPOs, WMI filter info is retrieved such as name, author, and code

# - GPOs with tombstone owners

# Usage:

# 1. Enter the name of the domain you want to check in the domain text box

# (defaults to the current domain)

# 2. Enter a server if you want to query a particular domain controller [optional]

# Click Check

# 3. A result is displayed in the output text window.

# 4. Click on Export to CSV if you want to export the results found

# 5. Click on Find, to generate a powershell script with the fixes.

# Note that not all issues are fixed:

# a. Empty GPOs will be removed

# b. GPO without links will be removed

# c. Disabled links will be deleted

# d. Empty User configuration settings will set the GPO status accordingly

# e. Empty Computer configuration settings will set the GPO status accordingly

# Disclaimer: code is provided as is, without support. Use at your own risk.

#========================================================================

# Import the necessary modules

try

{

import-module grouppolicy -ErrorAction Stop

}

catch

{

# the grouppolicy module requires at least Windows 7 or Windows Server 2008.

[System.Windows.Forms.MessageBox]::Show(<a href="about:blank">$_</a>.Exception.Message, "Error")| Out-Null

}

#define a newline variable, it will be handy in the multiline textbox

$nl = "`r`n"

# save the location of the current script

$scriptpath = $MyInvocation.MyCommand.Path

$dir = Split-Path $scriptpath

#region Import the Assemblies

[reflection.assembly]::loadwithpartialname("System.Windows.Forms") | Out-Null

[reflection.assembly]::loadwithpartialname("System.Drawing") | Out-Null

#endregion

$FormEvent_Load=

{

[System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms") | Out-Null

}

function Report-GPO

{

Param($GPO, $GPOreport, [string]$issue, $issueID, $WMI)

$linkArray = @()

$disLinkArray = @()

foreach($link in $GPOReport.GPO.LinksTo)

{

if ($link -ne $null)

{

if ($link.Enabled -eq $true)

{

$linkArray+= $link.SOMPath

}

else

{

$disLinkArray+= $link.SOMPath

}

$linkString = "$linkArray"

$disLinkString = "$disLinkArray"

$retReport = New-Object -TypeName PSCustomObject -Property @{

Name = $GPO.Displayname;

Links = $linkString;

DisabledLinks = $disLinkString;

DisabledLinkArray = $disLinkArray;

GUID = $GPO.Id;

IssueFound = $issue;

IssueID = $issueID;

CreationTime = $GPO.CreationTime;

ModificationTime = $GPO.ModificationTime;

GPOStatus = $GPO.GpoStatus;

WMIFilter = $GPO.WMIFilter.Name;

WMIdata = $WMI;

Owner = $GPO.Owner;

Description = $GPO.Description;

Path = $GPO.Path

}

return $retReport

}

# the following function's code is from Glenn Sizemore to convert a CN to DN

function ConvertFrom-Canonical

{

param([string]$canoincal=(throw '$Canonical is required!'))

$obj = $canoincal.Replace(',','\,').Split('/')

[string]$DN = "CN=" + $obj[$obj.count - 1]

for ($i = $obj.count - 2;$i -ge 1;$i--){$DN += ",OU=" + $obj[$i]}

$obj[0].split(".") | ForEach-Object { $DN += ",DC=" + <a href="about:blank">$_</a>}

return $dn

}

$form = New-Object System.Windows.Forms.Form

#Get AD Domain

$DomainDNS = [System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain().Name

$btnFind_OnClick=

{

$text = $textOut.Text

if ( $text.Length -eq 0 )

{

[System.Windows.Forms.MessageBox]::Show("Nothing to fix", "Error")| Out-Null

return

}

$dialog = New-Object System.Windows.Forms.SaveFileDialog

$dialog.Filter = "All Files (*.ps1)|*.ps1"

$dialog.ShowHelp = $true

$dialog.InitialDirectory = $dir

$dialog.Title = "Save script to file"

$res = $dialog.ShowDialog()

if ($res -eq "OK")

{

$fileout = $dialog.FileName

$textOut.AppendText("Generating script...")

$textOut.AppendText($nl)

# Create the file

"# File generated by GPO Magnifier tool."| Out-File -FilePath $fileout

"import-module grouppolicy -ErrorAction Stop" | Out-File -FilePath $fileout -Append

$nl | Out-File -FilePath $fileout -Append

# Generate the script

# Start by doing the "light stuff", i.e. anything that is not removing the GPO

ForEach ($element in $report)

{

switch ($element.IssueID)

{

# Remove disabled Links

"2"

{

foreach($link in $element.DisabledLinkArray)

{

if ($link -ne $null)

{

if ($link.Enabled -eq $false)

{

"# `""+$element.Name+"`""+" disabled link "+ $DN + " will be removed" | Out-File -FilePath $fileout -Append

("Remove-GPLink -guid "+$element.guid+" -target "+"`""+$DN+"`"") | Out-File -FilePath $fileout -Append

$nl | Out-File -FilePath $fileout -Append

$DN = ConvertFrom-Canonical($element.DisabledLinks)

$textOut.AppendText("`""+$element.Name+"`""+" disabled link "+ $DN + " will be removed")

$textOut.AppendText($nl)

$textOut.AppendText("Remove-GPLink -guid "+$element.guid+" -target "+"`""+$DN+"`"")

$textOut.AppendText($nl)

}

# Computer settings disabled

"3"

{

"# `""+$element.Name+"`""+" status will change from " + $element.GPOStatus +" to ComputerSettingsDisabled"| Out-File -FilePath $fileout -Append

"(get-gpo -guid "+$element.guid+").gpostatus = `"ComputerSettingsDisabled`"" | Out-File -FilePath $fileout -Append

$nl | Out-File -FilePath $fileout -Append

$textOut.AppendText("`""+$element.Name+"`""+" status will change from " + $element.GPOStatus +" to ComputerSettingsDisabled")

$textOut.AppendText($nl)

$textOut.AppendText("(get-gpo -guid "+$element.guid+").gpostatus = `"ComputerSettingsDisabled`"")

$textOut.AppendText($nl)

}

# User settings disabled

"4"

{

"# `""+$element.Name+"`""+" status will change from " + $element.GPOStatus +" to UserSettingsDisabled"| Out-File -FilePath $fileout -Append

"(get-gpo -guid "+$element.guid+").gpostatus = `"UserSettingsDisabled`"" | Out-File -FilePath $fileout -Append

$nl | Out-File -FilePath $fileout -Append

$textOut.AppendText("`""+$element.Name+"`""+" status will change from " + $element.GPOStatus +" to UserSettingsDisabled")

$textOut.AppendText($nl)

$textOut.AppendText("(get-gpo -guid "+$element.guid+").gpostatus = `"UserSettingsDisabled`"")

$textOut.AppendText($nl)

}

default

{

# do nothing

}

# Now generate all the remove GPO scripts

ForEach ($element in $report)

{

switch ($element.IssueID)

{

# Remove the GPO

"1"

{

"# `""+$element.Name+"`""+" will be deleted. " + $element.IssueFound| Out-File -FilePath $fileout -Append

"remove-gpo -guid " + $element.guid | Out-File -FilePath $fileout -Append

$nl | Out-File -FilePath $fileout -Append

$textOut.AppendText("`""+$element.Name+"`""+" will be deleted. " + $element.IssueFound)

$textOut.AppendText($nl)

$textOut.AppendText("remove-gpo -guid "+$element.guid)

$textOut.AppendText($nl)

}

$btnSave_OnClick=

{

$text = $textOut.Text

if ( $text.Length -eq 0 )

{

[System.Windows.Forms.MessageBox]::Show("Nothing to save", "Error")| Out-Null

return

}

$dialog = New-Object System.Windows.Forms.SaveFileDialog

$dialog.Filter = "All Files (*.csv)|*.csv"

$dialog.InitialDirectory = $dir

$dialog.ShowHelp = $true

$dialog.Title = "Save Audit to file"

$res = $dialog.ShowDialog()

if ($res -eq "OK")

{

$fileout = $dialog.FileName

$report |

Select-Object Name, IssueFound, Links, DisabledLinks, GPOStatus, CreationTime, ModificationTime, WMIFilter, WMIdata, Owner, Path | Export-CSV $fileout -NoTypeInformation

}

$btnCheck_OnClick=

{

$domainName = $textDomain.Text

$serverName = $textServer.Text

$report = @()

$GPOPolicies = @()

$textOut.Text = ""

[Int32]$count = 0;

# Get all GPOs from the given domain

try

{

if ($serverName.Length -eq 0)

{

[array]$GPOPolicies = Get-GPO -domain $domainName -All

}

else

{

[array]$GPOPolicies = Get-GPO -domain $domainName -server $serverName -All

}

catch

{

[System.Windows.Forms.MessageBox]::Show(<a href="about:blank">$_</a>.Exception.Message, "Error")| Out-Null

return

}

ForEach ($GPO in $GPOPolicies)

{

$status.Text = "Domain " + $domainName + " contains " + $GPOPolicies.Count + " GPOs. Retrieving GPO detailed information..." + $count + "/" + $GPOPolicies.Count

if ($serverName.Length -eq 0)

{

[xml]$GPOReport = (get-gporeport -guid $GPO.Id -ReportType xml -Domain $domainName )

}

else

{

[xml]$GPOReport = (get-gporeport -guid $GPO.Id -ReportType xml -Domain $domainName -Server $serverName)

}

$count++;

# test if the GPO's is linked

if ($GPOReport.gpo.LinksTo -eq $null)

{

$report += Report-GPO $GPO $GPOReport "GPO has no links" 1

# no point in checking the other points. This GPO is not used

continue

}

else

{

# test if the GPO links are disabled

if (-not (($GPOReport.GPO.LinksTo | Foreach {<a href="about:blank">$_</a>.Enabled}) -eq $true))

{

$report += Report-GPO $GPO $GPOReport "All GPO links are disabled" 1

}

else

{

if (($GPOReport.GPO.LinksTo | Foreach {<a href="about:blank">$_</a>.Enabled}) -eq $false)

{

$report += Report-GPO $GPO $GPOReport "Some GPO links are disabled" 2

}

# test if the GPO's has no settings

if (!$GPOReport.gpo.Computer.ExtensionData -and !$GPOReport.GPO.User.ExtensionData)

{

$report += Report-GPO $GPO $GPOReport "GPO is empty" 1

# no point in checking the other points. This GPO is empty

continue

}

else

{

# test if the extension is empty and the GPO is enabled

if (!$GPOReport.gpo.Computer.ExtensionData -and $GPO.GpoStatus -eq "ComputerSettingsEnabled")

{

$report += Report-GPO $GPO $GPOReport "Computer settings enabled without data" 3

}

if (!$GPOReport.gpo.Computer.ExtensionData -and $GPO.GpoStatus -eq "AllSettingsEnabled")

{

$report += Report-GPO $GPO $GPOReport "Computer settings enabled without data" 3

}

if (!$GPOReport.gpo.User.ExtensionData -and $GPO.GpoStatus -eq "UserSettingsEnabled")

{

$report += Report-GPO $GPO $GPOReport "User settings enabled without data" 4

}

if (!$GPOReport.gpo.User.ExtensionData -and $GPO.GpoStatus -eq "AllSettingsEnabled")

{

$report += Report-GPO $GPO $GPOReport "User settings enabled without data" 4

}

# test if the GPO is disabled

if ($GPO.GpoStatus -eq "AllSettingsDisabled")

{

$report += Report-GPO $GPO $GPOReport "GPO is disabled" 1

}

# test if the GPO's has a WMI filter

$result = @{}

if ($GPO.WMIFilter.Name.Length -gt 0)

{

# let's find what this filter does

$wmiFilterAttr = "msWMI-Name", "msWMI-Parm1", "msWMI-Parm2", "msWMI-Author", "msWMI-ID"

$search = New-Object System.DirectoryServices.DirectorySearcher([ADSI]("LDAP://" + $domainName))

$wminame = $GPO.WMIFilter.Name

$search.Filter = "(&(objectClass=msWMI-Som)(msWMI-Name=$wminame))"

$search.PropertiesToLoad.AddRange($wmiFilterAttr)

$result = $search.FindOne()

$WMI = New-Object -TypeName PSCustomObject -Property @{

Name = [string]$result.Properties["mswmi-name"];

Parm1 = [string]$result.Properties["mswmi-parm1"];

Parm2 = [string]$result.Properties["mswmi-parm2"];

Author = [string]$result.Properties["mswmi-author"];

ID = [string]$result.Properties["mswmi-ID"]

}

$report += Report-GPO $GPO $GPOReport "WMI filter found" 0 $WMI

}

# test if the GPO's owner is a tumbstone

$GPOowner = $GPO.Owner | Out-String

if ($GPOowner.Length -eq 0)

{

$report += Report-GPO $GPO $GPOReport "Owner not found" 0

}

else

{

if ($GPOowner.StartsWith("S-") -eq $true)

{

$report += Report-GPO $GPO $GPOReport "Owner is a tombstone" 0

}

$status.Text = "Domain " + $domainName + " contains " + $GPOPolicies.Count + " GPOs. Analysis done"

$textOut.AppendText(($report|Select-Object IssueFound, Name, Links, DisabledLinks, GUID, GPOStatus, WMIFilter, WMIdata, Description|Out-String))

$textOut.AppendText($nl)

$textOut.AppendText($report.Count)

$textOut.AppendText(" issues were found in a total of ")

$textOut.AppendText($GPOPolicies.Count)

$textOut.AppendText(" GPOs" )

$textOut.AppendText($nl)

}

# Add a label

$label = New-Object System.Windows.Forms.Label

$label.Text = "Domain:"

$label.Location = New-Object System.Drawing.Point(3,5)

$label.Size = New-Object System.Drawing.Size(50, 20)

$form.Controls.Add($label)

# Add the domain input textbox

$textDomain = New-Object System.Windows.Forms.TextBox

$textDomain.TabIndex = 1

$textDomain.Size = New-Object System.Drawing.Size(130, 30)

$textDomain.Text = "$DomainDNS"

$textDomain.Location = New-Object System.Drawing.Point(55, 3)

$form.Controls.Add($textDomain)

# Add another label

$label = New-Object System.Windows.Forms.Label

$label.Text = "Server:"

$label.Location = New-Object System.Drawing.Point(190,5)

$label.Size = New-Object System.Drawing.Size(50, 20)

$form.Controls.Add($label)

# Add the server input textbox

$textServer = New-Object System.Windows.Forms.TextBox

$textServer.TabIndex = 2

$textServer.Size = New-Object System.Drawing.Size(130, 30)

$textServer.Location = New-Object System.Drawing.Point(238, 3)

$form.Controls.Add($textServer)

# Add the output text box

$textOut = New-Object System.Windows.Forms.TextBox

$textOut.TabIndex = 6

$textOut.Size = New-Object System.Drawing.Size(605, 382)

$textOut.Location = New-Object System.Drawing.Point(1, 30)

$textOut.Multiline = $true

$textOut.ScrollBars = "Vertical"

$textOut.Font = "Courier New, 10pt"

$form.Controls.Add($textOut)

# Add the Check button

$btnCheck = New-Object System.Windows.Forms.Button

$btnCheck.TabIndex = 3

$btnCheck.Name = "btnCheck"

$btnCheck.Size = New-Object System.Drawing.Size(75,23)

$btnCheck.UseVisualStyleBackColor = $True

$btnCheck.Font = $FontSans825B

$btnCheck.Text = "Check"

$btnCheck.Location = New-Object System.Drawing.Point(370,3)

$btnCheck.DataBindings.DefaultDataSourceUpdateMode = 0

$btnCheck.add_Click($btnCheck_OnClick)

$form.Controls.Add($btnCheck)

# Add the Save button

$btnSave = New-Object System.Windows.Forms.Button

$btnSave.TabIndex = 4

$btnSave.Name = "btnSave"

$btnSave.Size = New-Object System.Drawing.Size(75,23)

$btnSave.UseVisualStyleBackColor = $True

$btnSave.Font = $FontSans825B

$btnSave.Text = "Export CSV"

$btnSave.Location = New-Object System.Drawing.Point(448,3)

$btnSave.DataBindings.DefaultDataSourceUpdateMode = 0

$btnSave.add_Click($btnSave_OnClick)

$form.Controls.Add($btnSave)

# Create the Find it button

$btnFind = New-Object System.Windows.Forms.Button

$btnFind.TabIndex = 5

$btnFind.Name = "btnFind"

$btnFind.Size = New-Object System.Drawing.Size(75,23)

$btnFind.UseVisualStyleBackColor = $True

$btnFind.Font = $FontSans825B

$btnFind.Text = "Find"

$btnFind.Location = New-Object System.Drawing.Point(526,3)

$btnFind.DataBindings.DefaultDataSourceUpdateMode = 0

$btnFind.add_Click($btnFind_OnClick)

$form.Controls.Add($btnFind)

# Create the statusBar

$statusStrip = new-object System.Windows.Forms.StatusStrip

$statusStrip.Location = new-object System.Drawing.Point(0, 463)

$statusStrip.Name = "statusStrip"

$statusStrip.Size = new-object System.Drawing.Size(664, 22);

$status = new-object System.Windows.Forms.ToolStripStatusLabel

$status.Text = ""

[void]$statusStrip.Items.add($status)

$form.Controls.Add($statusStrip)

# Set initial dialog size and title

$form.Size = New-Object System.Drawing.Size(620,475)

$form.Text = "GPO Magnifier Tool"

$OnResize =

{

$system_drawing_size = New-Object System.Drawing.Size

$system_drawing_size.Width = $form.Width - 15

$system_drawing_size.Height = $form.Height - 93

$textOut.Size = $system_drawing_size

}

$form.add_Resize($OnResize)

# change that ugly default icon

$code = @"

using System;

using System.Drawing;

using System.Runtime.InteropServices;

namespace System

{

public class IconExtractor

{

public static Icon Extract(string file, int number, bool largeIcon)

{

IntPtr large;

IntPtr small;

ExtractIconEx(file, number, out large, out small, 1);

try

{

return Icon.FromHandle(largeIcon ? large : small);

}

catch

{

return null;

}

[DllImport("Shell32.dll", EntryPoint = "ExtractIconExW", CharSet = CharSet.Unicode, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]

private static extern int ExtractIconEx(string sFile, int iIndex, out IntPtr piLargeVersion, out IntPtr piSmallVersion, int amountIcons);

}

Add-Type -TypeDefinition $code -ReferencedAssemblies System.Drawing | Out-Null

$form.Icon = [System.IconExtractor]::Extract("shell32.dll", 22, $true)

#Show the Form

$form.ShowDialog()| Out-Null

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Programmation et Scripting sous Powershell

GPO Magnifier

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