Unprotect-WindowsSecurity.psm1
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Function Unprotect-WindowsSecurity { [CmdletBinding()] param ( [Parameter(Mandatory = $false)] [switch]$OnlyProcessMitigations, [Parameter(Mandatory = $false, DontShow = $True)] # To hide PowerShell common parameters that clutter parameter auto completion menu $DummyParam ) # Stop the execution when there is an error $global:ErrorActionPreference = 'Stop' # Fetching Temp Directory [string]$global:UserTempDirectoryPath = [System.IO.Path]::GetTempPath() # Makes sure this cmdlet is invoked with Admin privileges if ().IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) { Write-Error -Message 'Unprotect-WindowsSecurity cmdlet requires Administrator privileges.' } # Import functions . "$psscriptroot\Functions.ps1" # Custom colors [scriptblock]$WriteFuchsia = { Write-Host "$($PSStyle.Foreground.FromRGB(236,68,155))$($args[0])$($PSStyle.Reset)" } [scriptblock]$WriteOrange = { Write-Host "$($PSStyle.Foreground.FromRGB(255,165,0))$($args[0])$($PSStyle.Reset)" } [scriptblock]$WriteMintGreen = { Write-Host "$($PSStyle.Foreground.FromRGB(152,255,152))$($args[0])$($PSStyle.Reset)" } # Only run this if -OnlyProcessMitigations parameter is passed if (!$OnlyProcessMitigations) { &$WriteOrange "`r`n" &$WriteOrange "###############################################################################################`r`n" &$WriteMintGreen "## This Will Remove the Hardening Measures Applied by Protect-WindowsSecurity Cmdlet ##`r`n" &$WriteOrange "###############################################################################################`r`n" # Give user a chance to exit if they accidentally ran this Pause } # doing a try-finally block on the entire script so that when CTRL + C is pressed to forcefully exit the script, # or break is passed, clean up will still happen for secure exit try { Write-Progress -Activity 'Backing up Controlled Folder Access exclusion list' -Status 'Processing' -PercentComplete 10 # backup the current allowed apps list in Controlled folder access in order to restore them at the end of the script # doing this so that when we Add and then Remove PowerShell executables in Controlled folder access exclusions # no user customization will be affected [string[]]$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. Get-ChildItem -Path "$PSHOME\*.exe" | ForEach-Object { Add-MpPreference -ControlledFolderAccessAllowedApplications $_.FullName } # create our working directory New-Item -ItemType Directory -Path "$global:UserTempDirectoryPath\HardeningXStuff\" -Force | Out-Null # working directory assignment [string]$WorkingDir = "$global:UserTempDirectoryPath\HardeningXStuff\" # change location to the new directory Set-Location -Path $WorkingDir # Clean up script block [scriptblock]$CleanUp = { Set-Location $HOME; Remove-Item -Recurse "$global:UserTempDirectoryPath\HardeningXStuff\" -Force; exit } Write-Progress -Activity 'Downloading the required files' -Status 'Processing' -PercentComplete 30 try { Invoke-WithoutProgress { # Download Registry CSV file from GitHub or Azure DevOps try { Invoke-WebRequest -Uri 'https://raw.githubusercontent.com/HotCakeX/Harden-Windows-Security/main/Payload/Registry.csv' -OutFile '.\Registry.csv' } catch { Write-Host 'Using Azure DevOps...' -ForegroundColor Yellow Invoke-WebRequest -Uri 'https://dev.azure.com/SpyNetGirl/011c178a-7b92-462b-bd23-2c014528a67e/_apis/git/repositories/5304fef0-07c0-4821-a613-79c01fb75657/items?path=/Payload/Registry.csv' -OutFile '.\Registry.csv' } # Download Process Mitigations CSV file from GitHub or Azure DevOps try { Invoke-WebRequest -Uri 'https://raw.githubusercontent.com/HotCakeX/Harden-Windows-Security/main/Payload/ProcessMitigations.csv' -OutFile '.\ProcessMitigations.csv' } catch { Write-Host 'Using Azure DevOps...' -ForegroundColor Yellow Invoke-WebRequest -Uri 'https://dev.azure.com/SpyNetGirl/011c178a-7b92-462b-bd23-2c014528a67e/_apis/git/repositories/5304fef0-07c0-4821-a613-79c01fb75657/items?path=/Payload/ProcessMitigations.csv' -OutFile '.\ProcessMitigations.csv' } } } catch { Write-Error "The required files couldn't be downloaded, Make sure you have Internet connection." &$CleanUp } # Only run this if -OnlyProcessMitigations parameter is NOT passed if (!$OnlyProcessMitigations) { Write-Progress -Activity 'Deleting all group policies' -Status 'Processing' -PercentComplete 45 if (Test-Path -Path 'C:\Windows\System32\GroupPolicy') { Remove-Item -Path 'C:\Windows\System32\GroupPolicy' -Recurse -Force } Write-Progress -Activity 'Deleting all the registry keys created by the Protect-WindowsSecurity cmdlet' -Status 'Processing' -PercentComplete 60 [System.Object[]]$Items = Import-Csv '.\Registry.csv' -Delimiter ',' foreach ($Item in $Items) { if (Test-Path -Path $item.path) { Remove-ItemProperty -Path $Item.path -Name $Item.key -Force -ErrorAction SilentlyContinue } } # To completely remove the Edge policy since only its sub-keys are removed by the command above Remove-Item -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge\TLSCipherSuiteDenyList' -Force -Recurse -ErrorAction SilentlyContinue # Restore Security group policies back to their default states Write-Progress -Activity 'Restoring the default Security group policies' -Status 'Processing' -PercentComplete 70 Invoke-WithoutProgress { # Download LGPO program from Microsoft servers Invoke-WebRequest -Uri 'https://download.microsoft.com/download/8/5/C/85C25433-A1B0-4FFA-9429-7E023E7DA8D8/LGPO.zip' -OutFile '.\LGPO.zip' } # unzip the LGPO file Expand-Archive -Path .\LGPO.zip -DestinationPath .\ -Force .\'LGPO_30\LGPO.exe' /s "$psscriptroot\Resources\Default Security Policy.inf" # Enable LMHOSTS lookup protocol on all network adapters again Set-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Services\NetBT\Parameters' -Name 'EnableLMHOSTS' -Value '1' -Type DWord # Disable restart notification for Windows update Set-ItemProperty -Path 'HKLM:\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 Write-Progress -Activity 'Restoring Microsoft Defender configs back to their default states' -Status 'Processing' -PercentComplete 80 # 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 $False # Set Microsoft Defender engine and platform update channels to NotConfigured State Set-MpPreference -EngineUpdatesChannel NotConfigured Set-MpPreference -PlatformUpdatesChannel NotConfigured } # Disable Mandatory ASLR Set-ProcessMitigation -System -Disable ForceRelocateImages # Remove Process Mitigations [System.Object[]]$ProcessMitigations = Import-Csv '.\ProcessMitigations.csv' -Delimiter ',' # Group the data by ProgramName [System.Object[]]$GroupedMitigations = $ProcessMitigations | Group-Object ProgramName [System.Object[]]$AllAvailableMitigations = (Get-ItemProperty -Path 'Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\*') Write-Progress -Activity 'Removing Process Mitigations for apps' -Status 'Processing' -PercentComplete 90 # 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 $AllAvailableMitigations.pschildname) { Remove-Item -Path "Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\$($Matches[1])" -Recurse -Force } } elseif ($Group.Name -in $AllAvailableMitigations.pschildname) { Remove-Item -Path "Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\$($Group.Name)" -Recurse -Force } } # Only run this if -OnlyProcessMitigations parameter is NOT passed if (!$OnlyProcessMitigations) { # Set Data Execution Prevention (DEP) back to its default value bcdedit.exe /set '{current}' nx OptIn | Out-Null # Remove the scheduled task that keeps the Microsoft recommended driver block rules updated # Define the name and path of the task [string]$taskName = 'MSFT Driver Block list update' [string]$taskPath = '\MSFT Driver Block list update\' 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 { $_.RuleGroup -eq '@%SystemRoot%\system32\firewallapi.dll,-37302' -and $_.Direction -eq 'inbound' } | ForEach-Object { Enable-NetFirewallRule -DisplayName $_.DisplayName } # Remove any custom views added by this script for Event Viewer if (Test-Path -Path 'C:\ProgramData\Microsoft\Event Viewer\Views\Hardening Script') { Remove-Item -Path 'C:\ProgramData\Microsoft\Event Viewer\Views\Hardening Script' -Recurse -Force } } Write-Progress -Activity 'Complete' -Status 'Complete' -PercentComplete 100 &$WriteFuchsia 'Operation Completed, please restart your computer.' } finally { # Reverting the PowerShell executables allow listings in Controlled folder access Get-ChildItem -Path "$PSHOME\*.exe" | ForEach-Object { Remove-MpPreference -ControlledFolderAccessAllowedApplications $_.FullName } # restoring the original Controlled folder access allow list - if user already had added PowerShell executables to the list # they will be restored as well, so user customization will remain intact if ($null -ne $CFAAllowedAppsBackup) { $CFAAllowedAppsBackup | ForEach-Object { Add-MpPreference -ControlledFolderAccessAllowedApplications $_ } } Set-Location $HOME; Remove-Item -Recurse "$global:UserTempDirectoryPath\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 #> } # Set PSReadline tab completion to complete menu for easier access to available parameters - Only for the current session Set-PSReadLineKeyHandler -Key Tab -Function MenuComplete |