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Impersonate a user and execute a script block as that user
param( [ScriptBlock] $scriptBlock )
Impersonates a user and executes a script block as that user. This is an interactive script
and a window will open in order to securely capture credentials.
Use-Impersonation.ps1 {Get-ChildItem 'C:\' | Foreach { Write-Host $_.Name }}
This writes the contents of 'C:\' impersonating the user that is entered.
$logonUserSignature =
[DllImport( "advapi32.dll" )]
public static extern bool LogonUser( String lpszUserName,
String lpszDomain,
IntPtr lpszPassword,
int dwLogonType,
int dwLogonProvider,
ref IntPtr phToken );
$AdvApi32 = Add-Type -MemberDefinition $logonUserSignature -Name "AdvApi32" -Namespace "PsInvoke.NativeMethods" -PassThru
$closeHandleSignature =
[DllImport( "kernel32.dll", CharSet = CharSet.Auto )]
public static extern bool CloseHandle( IntPtr handle );
$Kernel32 = Add-Type -MemberDefinition $closeHandleSignature -Name "Kernel32" -Namespace "PsInvoke.NativeMethods" -PassThru
$credentials = Get-Credential
$Logon32ProviderDefault = 0
$Logon32LogonInteractive = 2
$tokenHandle = [IntPtr]::Zero
$userName = Split-Path $credentials.UserName -Leaf
$domain = Split-Path $credentials.UserName
$unmanagedString = [IntPtr]::Zero;
$success = $false
$unmanagedString = [System.Runtime.InteropServices.Marshal]::SecureStringToGlobalAllocUnicode($credentials.Password);
$success = $AdvApi32::LogonUser($userName, $domain, $unmanagedString, $Logon32LogonInteractive, $Logon32ProviderDefault, [Ref] $tokenHandle)
if (!$success )
$retVal = [System.Runtime.InteropServices.Marshal]::GetLastWin32Error()
Write-Host "LogonUser was unsuccessful. Error code: $retVal"
Write-Host "LogonUser was successful."
Write-Host "Value of Windows NT token: $tokenHandle"
$identityName = [System.Security.Principal.WindowsIdentity]::GetCurrent().Name
Write-Host "Current Identity: $identityName"
$newIdentity = New-Object System.Security.Principal.WindowsIdentity( $tokenHandle )
$context = $newIdentity.Impersonate()
$identityName = [System.Security.Principal.WindowsIdentity]::GetCurrent().Name
Write-Host "Impersonating: $identityName"
Write-Host "Executing custom script"
& $scriptBlock
catch [System.Exception]
Write-Host $_.Exception.ToString()
if ( $context -ne $null )
if ( $tokenHandle -ne [System.IntPtr]::Zero )
$Kernel32::CloseHandle( $tokenHandle )
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kriskoneru commented Oct 2, 2018

windows powershell ISE crashes exactly at this $context = $newIdentity.Impersonate()

my scenario is i will be calling a powershell scripit as domain1/user1 and in this powershell script the user has to be changed to domain2/user2 so can i do this using this script ???.. and also i need to end impersonation once the task is completed. any thoughts would be greatly helpful. ( Can you change the script to change to a new user instead of logged in user ?? or some sample code ???)

I do not know why the windows powershell is crashing exactly at this step. ???

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