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Set-WMIReadOnlyAccess.ps1
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Set-WMIReadOnlyAccess.ps1
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<#
.SYNOPSIS
Configure WMI for the particular AD Identity (User or Group) on the computer for read only access.
.DESCRIPTION
This script sets up a user for WMI read-only access without giving them admin rights.
.NOTES
Refactored by Justin Grote <[email protected]>
Core Logic by Niklas Akerlund 2012-08-22
.LINK
http://vniklas.djungeln.se/2012/08/22/set-up-non-admin-account-to-access-wmi-and-performance-data-remotely-with-powershell/
#>
[CmdletBinding(
SupportsShouldProcess
)]
Param (
[Parameter(Mandatory)]
[string]$Identity,
[Parameter(ValueFromPipeline)]
[string]$ComputerName = $env:Computername
)
#region Includes
<#
.SYNOPSIS
Function that resolves SAMAccount and can exit script if resolution fails
#>
function Resolve-SamAccount {
param(
[string]$SamAccount
)
process {
try
{
$ADResolve = ([adsisearcher]"(samaccountname=$Identity)").findone().properties['samaccountname']
}
catch
{
$ADResolve = $null
}
if (!$ADResolve) {
throw "User `'$SamAccount`' not found in AD, please specify a valid user"
}
$ADResolve
}
} #function Resolve-SAMAccount
function Add-LocalGroupMember {
<#
.SYNOPSIS
Script to add an AD User or group to the Local Administrator group
.DESCRIPTION
The script can use either a plaintext file or a computer name as input and will add the trustee (user or group) as an administrator to the computer
.PARAMETER InputFile
A path that contains a plaintext file with computer names
.PARAMETER Computer
This parameter can be used instead of the InputFile parameter to specify a single computer or a series of
computers using a comma-separated format
.PARAMETER Trustee
The SamAccount name of an AD User or AD Group that is to be added to the Local Administrators group
.NOTES
Name: Add-LocalGroupMember
Author: Justin Grote (Modified from Original Author)
Original Author: Jaap Brasser
.LINK
http://www.jaapbrasser.com
.EXAMPLE
.\Add-LocalGroupMember -Computer Server01 -Trustee JaapBrasser
Description:
Will set the the JaapBrasser account as a Local Administrator on Server01
.EXAMPLE
.\Add-LocalGroupMember -Computer 'Server01,Server02' -Trustee Contoso\HRManagers
Description:
Will set the HRManagers group in the contoso domain as Local Administrators on Server01 and Server02
.EXAMPLE
.\Add-LocalGroupMember -InputFile C:\ListofComputers.txt -Trustee User01
Description:
Will set the User01 account as a Local Administrator on all servers and computernames listed in the ListofComputers file
#>
param(
[Parameter(ParameterSetName='InputFile')]
[string]
$InputFile,
[Parameter(ParameterSetName='Computer')]
[string] $ComputerName = $env:ComputerName,
[Parameter(Mandatory)]
[string] $Identity,
[Parameter(Mandatory)]
[string] $GroupName
)
<#
.SYNOPSIS
Function that resolves SAMAccount and can exit script if resolution fails
#>
function Resolve-SamAccount {
param(
[string]
$SamAccount,
[boolean]
$Exit
)
process {
try
{
$ADResolve = ([adsisearcher]"(samaccountname=$Identity)").findone().properties['samaccountname']
}
catch
{
$ADResolve = $null
}
if (!$ADResolve) {
throw "User `'$SamAccount`' not found in AD, please specify a valid user"
}
$ADResolve
}
} #function Resolve-SAMAccount
if ($Identity -notmatch '\\') {
$ADResolved = (Resolve-SamAccount -SamAccount $Identity -Exit:$true)
$Identity = 'WinNT://',"$env:userdomain",'/',$ADResolved -join ''
} else {
$ADResolved = ($Identity -split '\\')[1]
$DomainResolved = ($Identity -split '\\')[0]
$Identity = 'WinNT://',$DomainResolved,'/',$ADResolved -join ''
}
if (!$InputFile) {
[string[]]$ComputerName = $ComputerName.Split(',')
$ComputerName | ForEach-Object {
Write-Verbose "Adding `'$ADResolved`' to $GroupName group on `'$_`'"
try {
([ADSI]"WinNT://$_/$GroupName,group").add($Identity)
} catch {
Write-Warning "$_"
}
}
}
else {
if (!(Test-Path -Path $InputFile)) {
Write-Warning "Input file not found, please enter correct path"
exit
}
Get-Content -Path $InputFile | ForEach-Object {
Write-Host "Adding `'$ADResolved`' to $GroupName group on `'$_`'"
try {
([ADSI]"WinNT://$_/$GroupName,group").add($Identity)
} catch {
Write-Warning "$_"
}
}
}
} #Add-LocalGroupMember
Function Set-WmiNamespaceSecurity {
<#
.SYNOPSIS
Set WMI Permissions for a security entity
.NOTES
Copyright (c) Microsoft Corporation. All rights reserved.
For personal use only. Provided AS IS and WITH ALL FAULTS
Modifications made by vNicklas are included.
.LINK
http://blogs.msdn.com/b/wmi/archive/2009/07/27/scripting-wmi-namespace-security-part-3-of-3.aspx
.LINK
http://vniklas.djungeln.se/2012/08/22/set-up-non-admin-account-to-access-wmi-and-performance-data-remotely-with-powershell/
.EXAMPLE
Set-WmiNamespaceSecurity root/cimv2 add steve Enable,RemoteAccess
#>
Param ( [parameter(Mandatory=$true,Position=0)][string] $namespace,
[parameter(Mandatory=$true,Position=1)][string] $operation,
[parameter(Mandatory=$true,Position=2)][string] $account,
[parameter(Position=3)][string[]] $permissions = $null,
[bool] $allowInherit = $false,
[bool] $deny = $false,
[string] $computer = ".",
[System.Management.Automation.PSCredential] $credential = $null)
Process {
$ErrorActionPreference = "Stop"
Function Get-AccessMaskFromPermission($permissions) {
$WBEM_ENABLE = 1
$WBEM_METHOD_EXECUTE = 2
$WBEM_FULL_WRITE_REP = 4
$WBEM_PARTIAL_WRITE_REP = 8
$WBEM_WRITE_PROVIDER = 0x10
$WBEM_REMOTE_ACCESS = 0x20
$WBEM_RIGHT_SUBSCRIBE = 0x40
$WBEM_RIGHT_PUBLISH = 0x80
$READ_CONTROL = 0x20000
$WRITE_DAC = 0x40000
$WBEM_RIGHTS_FLAGS = $WBEM_ENABLE,$WBEM_METHOD_EXECUTE,$WBEM_FULL_WRITE_REP,
$WBEM_PARTIAL_WRITE_REP,$WBEM_WRITE_PROVIDER,$WBEM_REMOTE_ACCESS,
$READ_CONTROL,$WRITE_DAC
$WBEM_RIGHTS_STRINGS = "Enable","MethodExecute","FullWrite","PartialWrite",
"ProviderWrite","RemoteAccess","ReadSecurity","WriteSecurity"
$permissionTable = @{}
for ($i = 0; $i -lt $WBEM_RIGHTS_FLAGS.Length; $i++) {
$permissionTable.Add($WBEM_RIGHTS_STRINGS[$i].ToLower(), $WBEM_RIGHTS_FLAGS[$i])
}
$accessMask = 0
foreach ($permission in $permissions) {
if (-not $permissionTable.ContainsKey($permission.ToLower())) {
throw "Unknown permission: $permission" + "Valid permissions: $($permissionTable.Keys)"
}
$accessMask += $permissionTable[$permission.ToLower()]
}
$accessMask
}
if ($PSBoundParameters.ContainsKey("Credential")) {
$remoteparams = @{ComputerName=$computer;Credential=$credential}
} else {
$remoteparams = @{ComputerName=$computerName}
}
$invokeparams = @{Namespace=$namespace;Path="__systemsecurity=@"} + $remoteParams
$output = Invoke-WmiMethod @invokeparams -Name GetSecurityDescriptor
if ($output.ReturnValue -ne 0) {
throw "GetSecurityDescriptor failed: $($output.ReturnValue)"
}
$acl = $output.Descriptor
$OBJECT_INHERIT_ACE_FLAG = 0x1
$CONTAINER_INHERIT_ACE_FLAG = 0x2
$computerName = (Get-WmiObject @remoteparams Win32_ComputerSystem).Name
if ($account.Contains('\')) {
$domainaccount = $account.Split('\')
$domain = $domainaccount[0]
if (($domain -eq ".") -or ($domain -eq "BUILTIN")) {
$domain = $computerName
}
$accountname = $domainaccount[1]
} elseif ($account.Contains('@')) {
$domainaccount = $account.Split('@')
$domain = $domainaccount[1].Split('.')[0]
$accountname = $domainaccount[0]
} else {
$domain = $computerName
$accountname = $account
}
$getparams = @{Class="Win32_Account";Filter="Domain='$domain' and Name='$accountname'"}
$win32account = Get-WmiObject @getparams
if ($win32account -eq $null) {
throw "Account was not found: $account"
}
switch ($operation) {
"add" {
if ($permissions -eq $null) {
throw "-Permissions must be specified for an add operation"
}
$accessMask = Get-AccessMaskFromPermission($permissions)
$ace = (New-Object System.Management.ManagementClass("win32_Ace")).CreateInstance()
$ace.AccessMask = $accessMask
if ($allowInherit) {
$ace.AceFlags = $OBJECT_INHERIT_ACE_FLAG + $CONTAINER_INHERIT_ACE_FLAG
} else {
$ace.AceFlags = 0
}
$Identity = (New-Object System.Management.ManagementClass("win32_Trustee")).CreateInstance()
$Identity.SidString = $win32account.Sid
$ace.Trustee = $Identity
$ACCESS_ALLOWED_ACE_TYPE = 0x0
$ACCESS_DENIED_ACE_TYPE = 0x1
if ($deny) {
$ace.AceType = $ACCESS_DENIED_ACE_TYPE
} else {
$ace.AceType = $ACCESS_ALLOWED_ACE_TYPE
}
$acl.DACL += $ace.psobject.immediateBaseObject
}
"delete" {
if ($permissions -ne $null) {
throw "Permissions cannot be specified for a delete operation"
}
[System.Management.ManagementBaseObject[]]$newDACL = @()
foreach ($ace in $acl.DACL) {
if ($ace.Trustee.SidString -ne $win32account.Sid) {
$newDACL += $ace.psobject.immediateBaseObject
}
}
$acl.DACL = $newDACL.psobject.immediateBaseObject
}
default {
throw "Unknown operation: $operation`nAllowed operations: add delete"
}
}
$setparams = @{Name="SetSecurityDescriptor";ArgumentList=$acl.psobject.immediateBaseObject} + $invokeParams
$output = Invoke-WmiMethod @setparams
if ($output.ReturnValue -ne 0) {
throw "SetSecurityDescriptor failed: $($output.ReturnValue)"
}
}
} #function Set-WmiNameSpaceSecurity
#endregion Includes
#region Main
$WMIPermissionLocalGroups = "Distributed COM Users","Performance Monitor Users"
if ($pscmdlet.ShouldProcess("$ComputerName", "$Identity`: Add WMI Read-Only Access")) {
$WMIPermissionLocalGroups | foreach {
Add-LocalGroupMember -ComputerName $ComputerName -GroupName $PSItem -Identity $Identity
}
$WMINamespaceSecurityParams = @{
Namespace = "root/CIMv2"
Account = $Identity
Computer = $ComputerName
}
Set-WMINamespaceSecurity @WMINamespaceSecurityParams -Operation add -Permissions Enable,MethodExecute,ReadSecurity,RemoteAccess
}
#endregion Main