WDACConfig

0.2.8-Beta3

Shared/Get-BlockRulesMeta.psm1

                                Function Get-BlockRulesMeta {

    <#

    .SYNOPSIS

        Gets the latest Microsoft Recommended block rules, removes its allow all rules and sets HVCI to strict

    .INPUTS

        None. You cannot pipe objects to this function.

    .OUTPUTS

        System.String

    #>

    [CmdletBinding()]

    param ()

    # Importing the $PSDefaultParameterValues to the current session, prior to everything else

    . "$ModuleRootPath\CoreExt\PSDefaultParameterValues.ps1"

    # Importing the required sub-modules

    Import-Module -FullyQualifiedName "$ModuleRootPath\Shared\Write-ColorfulText.psm1" -Force

    [System.String]$Rules = (Invoke-WebRequest -Uri $MSFTRecommendedBlockRulesURL -ProgressAction SilentlyContinue).Content -replace "(?s).*``````xml(.*)``````.*", '$1' -replace '<Allow\sID="ID_ALLOW_A_[12]".*/>|<FileRuleRef\sRuleID="ID_ALLOW_A_[12]".*/>', ''

    $Rules | Out-File -FilePath '.\Microsoft recommended block rules TEMP.xml' -Force

    # Removing empty lines from policy file

    Get-Content -Path '.\Microsoft recommended block rules TEMP.xml' | Where-Object -FilterScript { $_.trim() -ne '' } | Out-File -FilePath '.\Microsoft recommended block rules.xml' -Force

    Remove-Item -Path '.\Microsoft recommended block rules TEMP.xml' -Force

    Set-RuleOption -FilePath '.\Microsoft recommended block rules.xml' -Option 3 -Delete

    Set-HVCIOptions -Strict -FilePath '.\Microsoft recommended block rules.xml'

    # Display the result

    Write-ColorfulText -Color MintGreen -InputText 'PolicyFile = Microsoft recommended block rules.xml'

}

# Export external facing functions only, prevent internal functions from getting exported

Export-ModuleMember -Function 'Get-BlockRulesMeta'

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