functions/other/Get-DMObjectDefaultPermission.ps1
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function Get-DMObjectDefaultPermission { <# .SYNOPSIS Gathers the default object permissions in AD. .DESCRIPTION Gathers the default object permissions in AD. Uses PowerShell remoting against the SchemaMaster to determine the default permissions, as local identity resolution is not reliable. .PARAMETER ObjectClass The object class to look up. .PARAMETER Server The server / domain to work with. .PARAMETER Credential The credentials to use for this operation. .EXAMPLE PS C:\> Get-DMObjectDefaultPermission -ObjectClass user Returns the default permissions for a user. #> [CmdletBinding()] Param ( [Parameter(Mandatory = $true)] [string] $ObjectClass, [PSFComputer] $Server = '<Default>', [PSCredential] $Credential ) begin { if (-not $script:schemaObjectDefaultPermission) { $script:schemaObjectDefaultPermission = @{ } } $parameters = $PSBoundParameters | ConvertTo-PSFHashtable -Include Server, Credential #region Scriptblock that gathers information on default permission $gatherScript = { #$domain = Get-ADDomain -Server localhost #$forest = Get-ADForest -Server localhost #$rootDomain = Get-ADDomain -Server $forest.RootDomain $commonAce = @() <# $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'BUILTIN\Pre-Windows 2000 Compatible Access'), 'ReadProperty', 'Allow', '4c164200-20c0-11d0-a768-00aa006e0529', 'Descendents', '4828cc14-1437-45bc-9b07-ad6f015e5f28') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'BUILTIN\Pre-Windows 2000 Compatible Access'), 'ReadProperty', 'Allow', 'bc0ac240-79a9-11d0-9020-00c04fc2d4cf', 'Descendents', '4828cc14-1437-45bc-9b07-ad6f015e5f28') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'BUILTIN\Pre-Windows 2000 Compatible Access'), 'ReadProperty', 'Allow', 'bc0ac240-79a9-11d0-9020-00c04fc2d4cf', 'Descendents', 'bf967aba-0de6-11d0-a285-00aa003049e2') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'BUILTIN\Pre-Windows 2000 Compatible Access'), 'ReadProperty', 'Allow', '59ba2f42-79a2-11d0-9020-00c04fc2d3cf', 'Descendents', '4828cc14-1437-45bc-9b07-ad6f015e5f28') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'BUILTIN\Pre-Windows 2000 Compatible Access'), 'ReadProperty', 'Allow', '59ba2f42-79a2-11d0-9020-00c04fc2d3cf', 'Descendents', 'bf967aba-0de6-11d0-a285-00aa003049e2') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'BUILTIN\Pre-Windows 2000 Compatible Access'), 'ReadProperty', 'Allow', '037088f8-0ae1-11d2-b422-00a0c968f939', 'Descendents', '4828cc14-1437-45bc-9b07-ad6f015e5f28') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'BUILTIN\Pre-Windows 2000 Compatible Access'), 'ReadProperty', 'Allow', '037088f8-0ae1-11d2-b422-00a0c968f939', 'Descendents', 'bf967aba-0de6-11d0-a285-00aa003049e2') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'BUILTIN\Pre-Windows 2000 Compatible Access'), 'ReadProperty', 'Allow', '4c164200-20c0-11d0-a768-00aa006e0529', 'Descendents', 'bf967aba-0de6-11d0-a285-00aa003049e2') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'BUILTIN\Pre-Windows 2000 Compatible Access'), 'ReadProperty', 'Allow', '5f202010-79a5-11d0-9020-00c04fc2d4cf', 'Descendents', 'bf967aba-0de6-11d0-a285-00aa003049e2') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'BUILTIN\Pre-Windows 2000 Compatible Access'), 'ReadProperty', 'Allow', '5f202010-79a5-11d0-9020-00c04fc2d4cf', 'Descendents', '4828cc14-1437-45bc-9b07-ad6f015e5f28') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'BUILTIN\Pre-Windows 2000 Compatible Access'), 'GenericRead', 'Allow', '00000000-0000-0000-0000-000000000000', 'Descendents', 'bf967aba-0de6-11d0-a285-00aa003049e2') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'BUILTIN\Pre-Windows 2000 Compatible Access'), 'GenericRead', 'Allow', '00000000-0000-0000-0000-000000000000', 'Descendents', 'bf967a9c-0de6-11d0-a285-00aa003049e2') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'BUILTIN\Pre-Windows 2000 Compatible Access'), 'GenericRead', 'Allow', '00000000-0000-0000-0000-000000000000', 'Descendents', '4828cc14-1437-45bc-9b07-ad6f015e5f28') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'BUILTIN\Pre-Windows 2000 Compatible Access'), 'ListChildren', 'Allow', '00000000-0000-0000-0000-000000000000', 'All', '00000000-0000-0000-0000-000000000000') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]"$($domain.NetBIOSName)\Key Admins"), 'ReadProperty, WriteProperty', 'Allow', '5b47d60f-6090-40b2-9f37-2a4de88f3063', 'All', '00000000-0000-0000-0000-000000000000') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]"$($rootDomain.NetBIOSName)\Enterprise Key Admins"), 'ReadProperty, WriteProperty', 'Allow', '5b47d60f-6090-40b2-9f37-2a4de88f3063', 'All', '00000000-0000-0000-0000-000000000000') $commonAce += New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]"$($rootDomain.NetBIOSName)\Enterprise Admins"), 'GenericAll', 'Allow', '00000000-0000-0000-0000-000000000000', 'All', '00000000-0000-0000-0000-000000000000') #> $parameters = @{ Server = $env:COMPUTERNAME } $rootDSE = Get-ADRootDSE @parameters $classes = Get-ADObject @parameters -SearchBase $rootDSE.schemaNamingContext -LDAPFilter '(objectCategory=classSchema)' -Properties defaultSecurityDescriptor, lDAPDisplayName foreach ($class in $classes) { $acl = [System.DirectoryServices.ActiveDirectorySecurity]::new() $acl.SetSecurityDescriptorSddlForm($class.defaultSecurityDescriptor) foreach ($rule in $commonAce) { $acl.AddAccessRule($rule) } <# if ($class.lDAPDisplayName -eq 'organizationalUnit') { $acl.AddAccessRule((New-Object System.DirectoryServices.ActiveDirectoryAccessRule(([System.Security.Principal.NTAccount]'Everyone'), 'DeleteTree, Delete', 'Deny', '00000000-0000-0000-0000-000000000000', 'None', '00000000-0000-0000-0000-000000000000'))) } #> [PSCustomObject]@{ Class = $class.lDAPDisplayName Access = $acl.Access } } } #endregion Scriptblock that gathers information on default permission } process { if ($script:schemaObjectDefaultPermission["$Server"]) { return $script:schemaObjectDefaultPermission["$Server"].$ObjectClass } #region Process Gathering logic if ($Server -ne '<Default>') { $parameters['ComputerName'] = $parameters.Server $parameters.Remove("Server") } try { $data = Invoke-PSFCommand @parameters -ScriptBlock $gatherScript -ErrorAction Stop } catch { throw } $script:schemaObjectDefaultPermission["$Server"] = @{ } foreach ($datum in $data) { $script:schemaObjectDefaultPermission["$Server"][$datum.Class] = $datum.Access } $script:schemaObjectDefaultPermission["$Server"].$ObjectClass #endregion Process Gathering logic } } |