Core/Unprotect-WindowsSecurity.psm1
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Function Unprotect-WindowsSecurity { [CmdletBinding( SupportsShouldProcess = $true, ConfirmImpact = 'High' )] [OutputType([System.String])] param ( [Parameter(Mandatory = $false)] [System.Management.Automation.SwitchParameter]$OnlyProcessMitigations, [Parameter(Mandatory = $false)] [System.Management.Automation.SwitchParameter]$Force ) begin { # Importing the required sub-modules Write-Verbose -Message 'Importing the required sub-modules' Import-Module -FullyQualifiedName "$HardeningModulePath\Shared\Update-self.psm1" -Force -Verbose:$false Import-Module -FullyQualifiedName "$HardeningModulePath\Shared\Test-IsAdmin.psm1" -Force -Verbose:$false # Makes sure this cmdlet is invoked with Admin privileges if (-NOT (Test-IsAdmin)) { Throw [System.Security.AccessControl.PrivilegeNotHeldException] 'Administrator' } Write-Verbose -Message 'Checking for updates...' Update-Self -InvocationStatement $MyInvocation.Statement # Fetching Temp Directory [System.String]$CurrentUserTempDirectoryPath = [System.IO.Path]::GetTempPath() # The total number of the steps for the parent/main progress bar to render [System.Int16]$TotalMainSteps = 7 [System.Int16]$CurrentMainStep = 0 # do not prompt for confirmation if the -Force switch is used # if both -Force and -Confirm switches are used, the prompt for confirmation will still be correctly shown if ($Force -and -Not $Confirm) { $ConfirmPreference = 'None' } } process { # Prompt for confirmation before proceeding if ($PSCmdlet.ShouldProcess('This PC', 'Removing the Hardening Measures Applied by the Protect-WindowsSecurity Cmdlet')) { # doing a try-finally block on the entire script so that when CTRL + C is pressed to forcefully exit the script, # or break is passed, clean up will still happen for secure exit try { $CurrentMainStep++ Write-Progress -Id 0 -Activity 'Backing up Controlled Folder Access exclusion list' -Status "Step $CurrentMainStep/$TotalMainSteps" -PercentComplete ($CurrentMainStep / $TotalMainSteps * 100) # backup the current allowed apps list in Controlled folder access in order to restore them at the end of the script # doing this so that when we Add and then Remove PowerShell executables in Controlled folder access exclusions # no user customization will be affected [System.String[]]$CFAAllowedAppsBackup = (Get-MpPreference).ControlledFolderAccessAllowedApplications # Temporarily allow the currently running PowerShell executables to the Controlled Folder Access allowed apps # so that the script can run without interruption. This change is reverted at the end. foreach ($FilePath in (Get-ChildItem -Path "$PSHOME\*.exe" -File).FullName) { Add-MpPreference -ControlledFolderAccessAllowedApplications $FilePath } Start-Sleep -Seconds 3 # create our working directory Write-Verbose -Message "Creating a working directory at $CurrentUserTempDirectoryPath\HardeningXStuff\" New-Item -ItemType Directory -Path "$CurrentUserTempDirectoryPath\HardeningXStuff\" -Force | Out-Null # working directory assignment [System.IO.DirectoryInfo]$WorkingDir = "$CurrentUserTempDirectoryPath\HardeningXStuff\" # change location to the new directory Write-Verbose -Message "Changing location to $WorkingDir" Set-Location -Path $WorkingDir # Disable Mandatory ASLR Set-ProcessMitigation -System -Disable ForceRelocateImages #region Remove-Process-Mitigations [System.Object[]]$ProcessMitigations = Import-Csv -Path "$HardeningModulePath\Resources\ProcessMitigations.csv" -Delimiter ',' # Group the data by ProgramName [System.Object[]]$GroupedMitigations = $ProcessMitigations | Group-Object -Property ProgramName [System.Object[]]$AllAvailableMitigations = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\*') $CurrentMainStep++ Write-Progress -Id 0 -Activity 'Removing Process Mitigations for apps' -Status "Step $CurrentMainStep/$TotalMainSteps" -PercentComplete ($CurrentMainStep / $TotalMainSteps * 100) # Loop through each group foreach ($Group in $GroupedMitigations) { # To separate the filename from full path of the item in the CSV and then check whether it exists in the system registry if ($Group.Name -match '\\([^\\]+)$') { if ($Matches[1] -in $AllAvailableMitigations.pschildname) { Remove-Item -Path "Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\$($Matches[1])" -Recurse -Force } } elseif ($Group.Name -in $AllAvailableMitigations.pschildname) { Remove-Item -Path "Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\$($Group.Name)" -Recurse -Force } } #endregion Remove-Process-Mitigations # Skip these if the user only wants to remove the Process Mitigations if (!$OnlyProcessMitigations) { $CurrentMainStep++ Write-Progress -Id 0 -Activity 'Deleting all group policies' -Status "Step $CurrentMainStep/$TotalMainSteps" -PercentComplete ($CurrentMainStep / $TotalMainSteps * 100) if (Test-Path -Path "$env:SystemDrive\Windows\System32\GroupPolicy") { Remove-Item -Path "$env:SystemDrive\Windows\System32\GroupPolicy" -Recurse -Force } $CurrentMainStep++ Write-Progress -Id 0 -Activity 'Deleting all the registry keys created by the Protect-WindowsSecurity cmdlet' -Status "Step $CurrentMainStep/$TotalMainSteps" -PercentComplete ($CurrentMainStep / $TotalMainSteps * 100) [System.Object[]]$Items = Import-Csv -Path "$HardeningModulePath\Resources\Registry.csv" -Delimiter ',' foreach ($Item in $Items) { if (Test-Path -Path $item.path) { Remove-ItemProperty -Path $Item.path -Name $Item.key -Force -ErrorAction SilentlyContinue } } # To completely remove the Edge policy since only its sub-keys are removed by the command above Remove-Item -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge\TLSCipherSuiteDenyList' -Force -Recurse -ErrorAction SilentlyContinue # Restore Security group policies back to their default states $CurrentMainStep++ Write-Progress -Id 0 -Activity 'Restoring the default Security group policies' -Status "Step $CurrentMainStep/$TotalMainSteps" -PercentComplete ($CurrentMainStep / $TotalMainSteps * 100) # Download LGPO program from Microsoft servers Invoke-WebRequest -Uri 'https://download.microsoft.com/download/8/5/C/85C25433-A1B0-4FFA-9429-7E023E7DA8D8/LGPO.zip' -OutFile '.\LGPO.zip' -ProgressAction SilentlyContinue -HttpVersion '3.0' -SslProtocol 'Tls12,Tls13' # unzip the LGPO file Expand-Archive -Path .\LGPO.zip -DestinationPath .\ -Force .\'LGPO_30\LGPO.exe' /q /s "$HardeningModulePath\Resources\Default Security Policy.inf" # Enable LMHOSTS lookup protocol on all network adapters again Set-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NetBT\Parameters' -Name 'EnableLMHOSTS' -Value '1' -Type DWord # Disable restart notification for Windows update Set-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate\UX\Settings' -Name 'RestartNotificationsAllowed2' -Value '0' -Type DWord # Re-enables the XblGameSave Standby Task that gets disabled by Microsoft Security Baselines SCHTASKS.EXE /Change /TN \Microsoft\XblGameSave\XblGameSaveTask /Enable | Out-Null $CurrentMainStep++ Write-Progress -Id 0 -Activity 'Restoring Microsoft Defender configs back to their default states' -Status "Step $CurrentMainStep/$TotalMainSteps" -PercentComplete ($CurrentMainStep / $TotalMainSteps * 100) # Disable the advanced new security features of the Microsoft Defender Set-MpPreference -AllowSwitchToAsyncInspection $False Set-MpPreference -OobeEnableRtpAndSigUpdate $False Set-MpPreference -IntelTDTEnabled $False Set-MpPreference -DisableRestorePoint $True Set-MpPreference -PerformanceModeStatus Enabled Set-MpPreference -EnableConvertWarnToBlock $False # Set Microsoft Defender engine and platform update channels to NotConfigured State Set-MpPreference -EngineUpdatesChannel NotConfigured Set-MpPreference -PlatformUpdatesChannel NotConfigured # Set Data Execution Prevention (DEP) back to its default value Set-BcdElement -Element 'nx' -Type 'Integer' -Value '0' # Remove the scheduled task that keeps the Microsoft recommended driver block rules updated # Define the name and path of the task [System.String]$taskName = 'MSFT Driver Block list update' [System.String]$taskPath = '\MSFT Driver Block list update\' Write-Verbose -Message "Removing the scheduled task $taskName" if (Get-ScheduledTask -TaskName $taskName -TaskPath $taskPath -ErrorAction SilentlyContinue) { Unregister-ScheduledTask -TaskName $taskName -TaskPath $taskPath -Confirm:$false | Out-Null } # Enables Multicast DNS (mDNS) UDP-in Firewall Rules for all 3 Firewall profiles Get-NetFirewallRule | Where-Object -FilterScript { $_.RuleGroup -eq '@%SystemRoot%\system32\firewallapi.dll,-37302' -and $_.Direction -eq 'inbound' } | ForEach-Object -Process { Enable-NetFirewallRule -DisplayName $_.DisplayName } # Remove any custom views added by this script for Event Viewer if (Test-Path -Path "$env:SystemDrive\ProgramData\Microsoft\Event Viewer\Views\Hardening Script") { Remove-Item -Path "$env:SystemDrive\ProgramData\Microsoft\Event Viewer\Views\Hardening Script" -Recurse -Force } # Set a tattooed Group policy for Svchost.exe process mitigations back to disabled state Set-ItemProperty -Path 'Registry::\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SCMConfig' -Name 'EnableSvchostMitigationPolicy' -Value '0' -Force -Type 'DWord' -ErrorAction SilentlyContinue } $CurrentMainStep++ Write-Progress -Id 0 -Activity 'Removing Downloads Defense Measures' -Status "Step $CurrentMainStep/$TotalMainSteps" -PercentComplete ($CurrentMainStep / $TotalMainSteps * 100) Write-Verbose -Message 'Getting the currently deployed base policies' if (((&"$env:SystemDrive\Windows\System32\CiTool.exe" -lp -json | ConvertFrom-Json).Policies | Where-Object -FilterScript { ($_.IsSystemPolicy -ne 'True') -and ($_.PolicyID -eq $_.BasePolicyID) -and ($_.FriendlyName -eq 'Downloads-Defense-Measures') -and ($_.IsOnDisk -eq 'True') })) { if (-NOT (Get-InstalledModule -Name 'WDACConfig' -ErrorAction SilentlyContinue -Verbose:$false)) { Write-Verbose -Message 'Installing WDACConfig module because it is not installed' Install-Module -Name 'WDACConfig' -Force -Verbose:$false } Write-Verbose -Message 'Removing the Downloads Defense Measures WDAC policy' Remove-WDACConfig -UnsignedOrSupplemental -PolicyNames Downloads-Defense-Measures -SkipVersionCheck } # Write in Fuchsia color Write-Host -Object "$($PSStyle.Foreground.FromRGB(236,68,155))Operation Completed, please restart your computer.$($PSStyle.Reset)" } finally { Write-Verbose -Message 'Finally block is running' # End the progress bar and mark it as completed Write-Progress -Id 0 -Activity 'Completed' -Completed # Reverting the PowerShell executables allow listings in Controlled folder access foreach ($FilePath in (Get-ChildItem -Path "$PSHOME\*.exe" -File).FullName) { Remove-MpPreference -ControlledFolderAccessAllowedApplications $FilePath } # restoring the original Controlled folder access allow list - if user already had added PowerShell executables to the list # they will be restored as well, so user customization will remain intact if ($null -ne $CFAAllowedAppsBackup) { Set-MpPreference -ControlledFolderAccessAllowedApplications $CFAAllowedAppsBackup } # Remove the working directory Set-Location -Path $HOME; Remove-Item -Recurse -Path "$CurrentUserTempDirectoryPath\HardeningXStuff\" -Force -ErrorAction SilentlyContinue } } } <# .SYNOPSIS Removes the hardening measures applied by Protect-WindowsSecurity cmdlet .LINK https://github.com/HotCakeX/Harden-Windows-Security/wiki/Harden%E2%80%90Windows%E2%80%90Security%E2%80%90Module .DESCRIPTION Removes the hardening measures applied by Protect-WindowsSecurity cmdlet .COMPONENT PowerShell .FUNCTIONALITY Removes the hardening measures applied by Protect-WindowsSecurity cmdlet .PARAMETER OnlyProcessMitigations Only removes the Process Mitigations / Exploit Protection settings and doesn't change anything else .PARAMETER Force Suppresses the confirmation prompt .EXAMPLE Unprotect-WindowsSecurity Removes all of the security features applied by the Protect-WindowsSecurity cmdlet .EXAMPLE Unprotect-WindowsSecurity -OnlyProcessMitigations Removes only the Process Mitigations / Exploit Protection settings and doesn't change anything else .EXAMPLE Unprotect-WindowsSecurity -Force Removes all of the security features applied by the Protect-WindowsSecurity cmdlet without prompting for confirmation .INPUTS System.Management.Automation.SwitchParameter .OUTPUTS System.String #> } |