Core/Remove-WDACConfig.psm1
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Function Remove-WDACConfig { [CmdletBinding( DefaultParameterSetName = 'Signed Base', SupportsShouldProcess = $true, PositionalBinding = $false, ConfirmImpact = 'High' )] Param( [Alias('S')] [Parameter(Mandatory = $false, ParameterSetName = 'Signed Base')][System.Management.Automation.SwitchParameter]$SignedBase, [Alias('U')] [Parameter(Mandatory = $false, ParameterSetName = 'Unsigned Or Supplemental')][System.Management.Automation.SwitchParameter]$UnsignedOrSupplemental, [ValidatePattern('\.xml$')] [ValidateScript({ # Validate each Policy file in PolicyPaths parameter to make sure the user isn't accidentally trying to remove an Unsigned policy $_ | ForEach-Object -Process { $XmlTest = [System.Xml.XmlDocument](Get-Content -Path $_) $RedFlag1 = $XmlTest.SiPolicy.SupplementalPolicySigners.SupplementalPolicySigner.SignerId $RedFlag2 = $XmlTest.SiPolicy.UpdatePolicySigners.UpdatePolicySigner.SignerId if ($RedFlag1 -or $RedFlag2) { return $True } } }, ErrorMessage = 'The policy XML file(s) you chose are Unsigned policies. Please use Remove-WDACConfig cmdlet with -UnsignedOrSupplemental parameter instead.')] [parameter(Mandatory = $true, ParameterSetName = 'Signed Base', ValueFromPipelineByPropertyName = $true)] [System.String[]]$PolicyPaths, [ValidateScript({ # Create an empty array to store the output objects [System.String[]]$Output = @() # Loop through each certificate that uses RSA algorithm (Because ECDSA is not supported for signing WDAC policies) in the current user's personal store and extract the relevant properties foreach ($Cert in (Get-ChildItem -Path 'Cert:\CurrentUser\My' | Where-Object -FilterScript { $_.PublicKey.Oid.FriendlyName -eq 'RSA' })) { # Takes care of certificate subjects that include comma in their CN # Determine if the subject contains a comma if ($Cert.Subject -match 'CN=(?<RegexTest>.*?),.*') { # If the CN value contains double quotes, use split to get the value between the quotes if ($matches['RegexTest'] -like '*"*') { $SubjectCN = ($Element.Certificate.Subject -split 'CN="(.+?)"')[1] } # Otherwise, use the named group RegexTest to get the CN value else { $SubjectCN = $matches['RegexTest'] } } # If the subject does not contain a comma, use a lookbehind to get the CN value elseif ($Cert.Subject -match '(?<=CN=).*') { $SubjectCN = $matches[0] } $Output += $SubjectCN } $Output -contains $_ }, ErrorMessage = "A certificate with the provided common name doesn't exist in the personal store of the user certificates." )] [parameter(Mandatory = $false, ParameterSetName = 'Signed Base', ValueFromPipelineByPropertyName = $true)] [System.String]$CertCN, [ArgumentCompleter({ # Define the parameters that this script block will accept. param($commandName, $parameterName, $wordToComplete, $commandAst, $fakeBoundParameters) # Get a list of policies using the CiTool, excluding system policies and policies that aren't on disk. # by adding "| Where-Object -FilterScript { $_.FriendlyName }" we make sure the auto completion works when at least one of the policies doesn't have a friendly name $Policies = (&'C:\Windows\System32\CiTool.exe' -lp -json | ConvertFrom-Json).Policies | Where-Object -FilterScript { ($_.IsOnDisk -eq 'True') -and ($_.IsSystemPolicy -ne 'True') -and $_.FriendlyName } # Create a hashtable mapping policy names to policy IDs. This will be used later to check if a policy ID already exists. $NameIDMap = @{} foreach ($Policy in $Policies) { $NameIDMap[$Policy.Friendlyname] = $Policy.policyID } # Get the IDs of existing policies that are already being used in the current command. $ExistingIDs = $fakeBoundParameters['PolicyIDs'] # Get the policy names that are currently being used in the command. This is done by looking at the abstract syntax tree (AST) # of the command and finding all string literals, which are assumed to be policy names. $Existing = $commandAst.FindAll({ $args[0] -is [System.Management.Automation.Language.StringConstantExpressionAst] }, $false).Value # Filter out the policy names that are already being used or whose corresponding policy IDs are already being used. # The resulting list of policy names is what will be shown as autocomplete suggestions. $Candidates = $Policies.Friendlyname | Where-Object -FilterScript { $_ -notin $Existing -and $NameIDMap[$_] -notin $ExistingIDs } # Additionally, if the policy name contains spaces, it's enclosed in single quotes to ensure it's treated as a single argument. # This is achieved using the Compare-Object cmdlet to compare the existing and candidate values, and outputting the resulting matches. # For each resulting match, it checks if the match contains a space, if so, it's enclosed in single quotes, if not, it's returned as is. (Compare-Object -ReferenceObject $Candidates -DifferenceObject $Existing -PassThru | Where-Object -Property SideIndicator -EQ '<=' ). ForEach({ if ($_ -match ' ') { "'{0}'" -f $_ } else { $_ } }) })] [ValidateScript({ if ($_ -notin [PolicyNamezx]::new().GetValidValues()) { throw "Invalid policy name: $_" } $true })] [Parameter(Mandatory = $false, ParameterSetName = 'Unsigned Or Supplemental')] [System.String[]]$PolicyNames, [ArgumentCompleter({ param($commandName, $parameterName, $wordToComplete, $commandAst, $fakeBoundParameters) # Get a list of policies using the CiTool, excluding system policies and policies that aren't on disk. $Policies = (&'C:\Windows\System32\CiTool.exe' -lp -json | ConvertFrom-Json).Policies | Where-Object -FilterScript { ($_.IsOnDisk -eq 'True') -and ($_.IsSystemPolicy -ne 'True') } # Create a hashtable mapping policy IDs to policy names. This will be used later to check if a policy name already exists. $IDNameMap = @{} foreach ($Policy in $Policies) { $IDNameMap[$Policy.policyID] = $Policy.Friendlyname } # Get the names of existing policies that are already being used in the current command. $ExistingNames = $fakeBoundParameters['PolicyNames'] # Get the policy IDs that are currently being used in the command. This is done by looking at the abstract syntax tree (AST) # of the command and finding all string literals, which are assumed to be policy IDs. $Existing = $commandAst.FindAll({ $args[0] -is [System.Management.Automation.Language.StringConstantExpressionAst] }, $false).Value # Filter out the policy IDs that are already being used or whose corresponding policy names are already being used. # The resulting list of policy IDs is what will be shown as autocomplete suggestions. $Candidates = $Policies.policyID | Where-Object -FilterScript { $_ -notin $Existing -and $IDNameMap[$_] -notin $ExistingNames } # Return the candidates. return $Candidates })] [ValidateScript({ if ($_ -notin [PolicyIDzx]::new().GetValidValues()) { throw "Invalid policy ID: $_" } $true })] [Parameter(Mandatory = $false, ParameterSetName = 'Unsigned Or Supplemental')] [System.String[]]$PolicyIDs, [parameter(Mandatory = $false, ParameterSetName = 'Signed Base', ValueFromPipelineByPropertyName = $true)] [System.String]$SignToolPath, [Parameter(Mandatory = $false)] [System.Management.Automation.SwitchParameter]$Force, [Parameter(Mandatory = $false)][System.Management.Automation.SwitchParameter]$SkipVersionCheck ) begin { # Detecting if Verbose switch is used $PSBoundParameters.Verbose.IsPresent ? ([System.Boolean]$Verbose = $true) : ([System.Boolean]$Verbose = $false) | Out-Null # Importing the $PSDefaultParameterValues to the current session, prior to everything else . "$ModuleRootPath\CoreExt\PSDefaultParameterValues.ps1" # Importing the required sub-modules Write-Verbose -Message 'Importing the required sub-modules' Import-Module -FullyQualifiedName "$ModuleRootPath\Shared\Update-self.psm1" -Force Import-Module -FullyQualifiedName "$ModuleRootPath\Shared\Get-SignTool.psm1" -Force Import-Module -FullyQualifiedName "$ModuleRootPath\Shared\Confirm-CertCN.psm1" -Force Import-Module -FullyQualifiedName "$ModuleRootPath\Shared\Write-ColorfulText.psm1" -Force # if -SkipVersionCheck wasn't passed, run the updater if (-NOT $SkipVersionCheck) { Update-self -InvocationStatement $MyInvocation.Statement } #Region User-Configurations-Processing-Validation Write-Verbose -Message 'Validating and processing user configurations' if ($PSCmdlet.ParameterSetName -eq 'Signed Base') { # If any of these parameters, that are mandatory for all of the position 0 parameters, isn't supplied by user if (!$SignToolPath -or !$CertCN) { # Read User configuration file if it exists $UserConfig = Get-Content -Path "$UserAccountDirectoryPath\.WDACConfig\UserConfigurations.json" -ErrorAction SilentlyContinue if ($UserConfig) { # Validate the Json file and read its content to make sure it's not corrupted try { $UserConfig = $UserConfig | ConvertFrom-Json } catch { Write-Error -Message 'User Configuration Json file is corrupted, deleting it...' -ErrorAction Continue Remove-CommonWDACConfig } } } # Get SignToolPath from user parameter or user config file or auto-detect it if ($SignToolPath) { $SignToolPathFinal = Get-SignTool -SignToolExePath $SignToolPath } # If it is null, then Get-SignTool will behave the same as if it was called without any arguments. else { $SignToolPathFinal = Get-SignTool -SignToolExePath ($UserConfig.SignToolCustomPath ?? $null) } # If CertCN was not provided by user if (!$CertCN) { if ($UserConfig.CertificateCommonName) { # Check if the value in the User configuration file exists and is valid if (Confirm-CertCN -CN $($UserConfig.CertificateCommonName)) { # if it's valid then use it $CertCN = $UserConfig.CertificateCommonName } else { throw 'The currently saved value for CertCN in user configurations is invalid.' } } else { throw 'CertCN parameter cannot be empty and no valid configuration was found for it.' } } } #Endregion User-Configurations-Processing-Validation # ValidateSet for Policy names Class PolicyNamezx : System.Management.Automation.IValidateSetValuesGenerator { [System.String[]] GetValidValues() { $PolicyNamezx = ((&'C:\Windows\System32\CiTool.exe' -lp -json | ConvertFrom-Json).Policies | Where-Object -FilterScript { ($_.IsOnDisk -eq 'True') -and ($_.IsSystemPolicy -ne 'True') }).Friendlyname | Select-Object -Unique return [System.String[]]$PolicyNamezx } } # ValidateSet for Policy IDs Class PolicyIDzx : System.Management.Automation.IValidateSetValuesGenerator { [System.String[]] GetValidValues() { $PolicyIDzx = ((&'C:\Windows\System32\CiTool.exe' -lp -json | ConvertFrom-Json).Policies | Where-Object -FilterScript { ($_.IsOnDisk -eq 'True') -and ($_.IsSystemPolicy -ne 'True') }).policyID return [System.String[]]$PolicyIDzx } } # argument tab auto-completion and ValidateSet for Policy names # Defines the PolicyNamez class that implements the IValidateSetValuesGenerator interface. This class is responsible for generating a list of valid values for the policy names. Class PolicyNamez : System.Management.Automation.IValidateSetValuesGenerator { # Creates a static hashtable to store a mapping of policy IDs to their respective friendly names. static [System.Collections.Hashtable] $IDNameMap = @{} # Defines a method to get valid policy names from the policies on disk that aren't system policies. [System.String[]] GetValidValues() { $Policies = (&'C:\Windows\System32\CiTool.exe' -lp -json | ConvertFrom-Json).Policies | Where-Object -FilterScript { ($_.IsOnDisk -eq 'True') -and ($_.IsSystemPolicy -ne 'True') } self::$IDNameMap = @{} foreach ($Policy in $Policies) { self::$IDNameMap[$Policy.policyID] = $Policy.Friendlyname } # Returns an array of unique policy names. return [System.String[]]($Policies.Friendlyname | Select-Object -Unique) } # Defines a static method to get a policy name by its ID. This method will be used to check if a policy ID is already in use. static [System.String] GetPolicyNameByID($ID) { return self::$IDNameMap[$ID] } } # Defines the PolicyIDz class that also implements the IValidateSetValuesGenerator interface. This class is responsible for generating a list of valid values for the policy IDs. Class PolicyIDz : System.Management.Automation.IValidateSetValuesGenerator { # Creates a static hashtable to store a mapping of policy friendly names to their respective IDs. static [System.Collections.Hashtable] $NameIDMap = @{} # Defines a method to get valid policy IDs from the policies on disk that aren't system policies. [System.String[]] GetValidValues() { $Policies = (&'C:\Windows\System32\CiTool.exe' -lp -json | ConvertFrom-Json).Policies | Where-Object -FilterScript { ($_.IsOnDisk -eq 'True') -and ($_.IsSystemPolicy -ne 'True') } self::$NameIDMap = @{} foreach ($Policy in $Policies) { self::$NameIDMap[$Policy.Friendlyname] = $Policy.policyID } # Returns an array of unique policy IDs. return [System.String[]]($Policies.policyID | Select-Object -Unique) } # Defines a static method to get a policy ID by its name. This method will be used to check if a policy name is already in use. static [System.String] GetPolicyIDByName($Name) { return self::$NameIDMap[$Name] } } # Detecting if Confirm switch is used to bypass the confirmation prompts if ($Force -and -Not $Confirm) { $ConfirmPreference = 'None' } } process { # If a signed policy is being removed if ($SignedBase) { Write-Verbose -Message 'Looping over each selected policy XML file' foreach ($PolicyPath in $PolicyPaths) { # The total number of the main steps for the progress bar to render [System.Int16]$TotalSteps = 3 [System.Int16]$CurrentStep = 0 $CurrentStep++ Write-Progress -Id 18 -Activity 'Parsing the XML Policy' -Status "Step $CurrentStep/$TotalSteps" -PercentComplete ($CurrentStep / $TotalSteps * 100) # Convert the XML file into an XML object Write-Verbose -Message 'Converting the XML file to an XML object' $Xml = [System.Xml.XmlDocument](Get-Content -Path $PolicyPath) # Extract the Policy ID from the XML object Write-Verbose -Message 'Extracting the Policy ID from the XML object' [System.String]$PolicyID = $Xml.SiPolicy.PolicyID Write-Verbose -Message "The policy ID of the currently processing xml file is $PolicyID" # Prevent users from accidentally attempting to remove policies that aren't even deployed on the system Write-Verbose -Message 'Making sure the selected XML policy is deployed on the system' $CurrentPolicyIDs = ((&'C:\Windows\System32\CiTool.exe' -lp -json | ConvertFrom-Json).Policies | Where-Object -FilterScript { $_.IsSystemPolicy -ne 'True' }).policyID | ForEach-Object -Process { "{$_}" } if ($CurrentPolicyIDs -notcontains $PolicyID) { Throw 'The selected policy file is not deployed on the system.' } $CurrentStep++ Write-Progress -Id 18 -Activity 'Processing the policy' -Status "Step $CurrentStep/$TotalSteps" -PercentComplete ($CurrentStep / $TotalSteps * 100) # Sanitize the policy file by removing SupplementalPolicySigners from it Write-Verbose -Message 'Sanitizing the XML policy file by removing SupplementalPolicySigners from it' # Extracting the SupplementalPolicySigner ID from the selected XML policy file, if any $SuppSingerIDs = $Xml.SiPolicy.SupplementalPolicySigners.SupplementalPolicySigner.SignerId # Extracting the policy name from the selected XML policy file [System.String]$PolicyName = ($Xml.SiPolicy.Settings.Setting | Where-Object -FilterScript { $_.provider -eq 'PolicyInfo' -and $_.valuename -eq 'Name' -and $_.key -eq 'Information' }).value.string if ($SuppSingerIDs) { Write-Verbose -Message "`n$($SuppSingerIDs.count) SupplementalPolicySigners have been found in $PolicyName policy, removing them now..." # Looping over each SupplementalPolicySigner and removing it $SuppSingerIDs | ForEach-Object -Process { $PolContent = Get-Content -Raw -Path $PolicyPath $PolContent -match "<Signer ID=`"$_`"[\S\s]*</Signer>" | Out-Null $PolContent = $PolContent -replace $Matches[0], '' Set-Content -Value $PolContent -Path $PolicyPath } # Removing the Supplemental policy signers block from the XML file $PolContent -match '<SupplementalPolicySigners>[\S\s]*</SupplementalPolicySigners>' | Out-Null $PolContent = $PolContent -replace $Matches[0], '' Set-Content -Value $PolContent -Path $PolicyPath -Force # Remove empty lines from the entire policy file (Get-Content -Path $PolicyPath) | Where-Object -FilterScript { $_.trim() -ne '' } | Set-Content -Path $PolicyPath -Force Write-Verbose -Message 'Policy successfully sanitized and all SupplementalPolicySigners have been removed.' } else { Write-Verbose -Message "`nNo sanitization required because no SupplementalPolicySigners have been found in $PolicyName policy." } # Adding policy rule option "Unsigned System Integrity Policy" to the selected XML policy file Set-RuleOption -FilePath $PolicyPath -Option 6 # Converting the Policy XML file to CIP binary file ConvertFrom-CIPolicy -XmlFilePath $PolicyPath -BinaryFilePath "$PolicyID.cip" | Out-Null $CurrentStep++ Write-Progress -Id 18 -Activity 'Signing the policy' -Status "Step $CurrentStep/$TotalSteps" -PercentComplete ($CurrentStep / $TotalSteps * 100) # Configure the parameter splat $ProcessParams = @{ 'ArgumentList' = 'sign', '/v' , '/n', "`"$CertCN`"", '/p7', '.', '/p7co', '1.3.6.1.4.1.311.79.1', '/fd', 'certHash', ".\$PolicyID.cip" 'FilePath' = $SignToolPathFinal 'NoNewWindow' = $true 'Wait' = $true 'ErrorAction' = 'Stop' } if (!$Verbose) { $ProcessParams['RedirectStandardOutput'] = 'NUL' } # Sign the files with the specified cert Write-Verbose -Message 'Signing the new CIP binary' Start-Process @ProcessParams # Removing the unsigned CIP file Remove-Item -Path ".\$PolicyID.cip" -Force # Fixing the extension name of the newly signed CIP file Rename-Item -Path "$PolicyID.cip.p7" -NewName "$PolicyID.cip" -Force # Deploying the newly signed CIP file # Prompt for confirmation before proceeding if ($PSCmdlet.ShouldProcess('This PC', 'Deploying the signed policy')) { Write-Verbose -Message 'Deploying the newly signed CIP file' &'C:\Windows\System32\CiTool.exe' --update-policy ".\$PolicyID.cip" -json | Out-Null Write-ColorfulText -Color Lavender -InputText "Policy with the following details has been Re-signed and Re-deployed in Unsigned mode.`nPlease restart your system." Write-ColorfulText -Color MintGreen -InputText "PolicyName = $PolicyName" Write-ColorfulText -Color MintGreen -InputText "PolicyGUID = $PolicyID" Write-Verbose -Message 'Removing the newly signed CIP file from the current directory after deployment' Remove-Item -Path ".\$PolicyID.cip" -Force } Write-Progress -Id 18 -Activity 'Complete.' -Completed } } # If an unsigned policy is being removed if ($UnsignedOrSupplemental) { # If IDs were supplied by user foreach ($ID in $PolicyIDs ) { &'C:\Windows\System32\CiTool.exe' --remove-policy "{$ID}" -json | Out-Null Write-ColorfulText -Color Lavender -InputText "Policy with the ID $ID has been successfully removed." } # If names were supplied by user # Empty array to store Policy IDs based on the input name, this will take care of the situations where multiple policies with the same name are deployed [System.Object[]]$NameID = @() foreach ($PolicyName in $PolicyNames) { $NameID += ((&'C:\Windows\System32\CiTool.exe' -lp -json | ConvertFrom-Json).Policies | Where-Object -FilterScript { ($_.IsOnDisk -eq 'True') -and ($_.FriendlyName -eq $PolicyName) }).PolicyID } Write-Verbose -Message 'The Following policy IDs have been gathered from the supplied policy names and are going to be removed from the system' $NameID | Select-Object -Unique | ForEach-Object -Process { Write-Verbose -Message "$_" } $NameID | Select-Object -Unique | ForEach-Object -Process { &'C:\Windows\System32\CiTool.exe' --remove-policy "{$_}" -json | Out-Null Write-ColorfulText -Color Lavender -InputText "Policy with the ID $_ has been successfully removed." } } } <# .SYNOPSIS Removes Signed and unsigned deployed WDAC policies (Windows Defender Application Control) .LINK https://github.com/HotCakeX/Harden-Windows-Security/wiki/Remove-WDACConfig .DESCRIPTION Using official Microsoft methods, Removes Signed and unsigned deployed WDAC policies (Windows Defender Application Control) .COMPONENT Windows Defender Application Control, ConfigCI PowerShell module .FUNCTIONALITY Using official Microsoft methods, Removes Signed and unsigned deployed WDAC policies (Windows Defender Application Control) .PARAMETER PolicyNames Names of the deployed policies to be removed https://stackoverflow.com/questions/76143006/how-to-prevent-powershell-validateset-argument-completer-from-suggesting-the-sam/76143269 https://stackoverflow.com/questions/76267235/powershell-how-to-cross-reference-parameters-between-2-argument-completers .PARAMETER PolicyIDs IDs of the deployed policies to be removed https://stackoverflow.com/questions/76143006/how-to-prevent-powershell-validateset-argument-completer-from-suggesting-the-sam/76143269 https://stackoverflow.com/questions/76267235/powershell-how-to-cross-reference-parameters-between-2-argument-completers .PARAMETER SignedBase Remove Signed Base WDAC Policies .PARAMETER PolicyPaths Path to the XML policy file(s) of the deployed policies to be removed .PARAMETER CertCN Certificate common name to be used to sign the policy file(s) that are going to be removed in unsigned mode .PARAMETER SignToolPath Path to the SignTool.exe .PARAMETER UnsignedOrSupplemental Remove Unsigned deployed WDAC policies as well as Signed deployed Supplemental WDAC policies .PARAMETER Force Bypasses the confirmation prompt .PARAMETER SkipVersionCheck Can be used with any parameter to bypass the online version check - only to be used in rare cases .PARAMETER Verbose Shows verbose output .INPUTS System.String System.String[] System.Management.Automation.SwitchParameter .OUTPUTS System.String #> } # Importing argument completer ScriptBlocks . 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