Running PowerShell version 5.0 on Windows 10 Build 10240. I need to obtain a PSCredential instance that contains the LocalSystem context. How can I achieve this?
https://msdn.microsoft.com/en-us/library/windows/desktop/ms684190(v=vs.85).aspx
From the documentation you linked to:
This account does not have a password. If you specify the LocalSystem account in a call to the CreateService or ChangeServiceConfig function, any password information you provide is ignored.
So, just supply "any password information" in the pscredential constructor:
$Username = "NT AUTHORITY\SYSTEM"
$Password = "whatever you feel like" | ConvertTo-SecureString -AsPlainText -Force
$LocalSystemCreds = New-Object -TypeName pscredential -ArgumentList $Username,$Password
Related
How does one connect anonymously to an SMB share in powershell using New-PSDrive?
I've tried omitting the -Credential param but this seems to use the currently logged in user. This works when I test using a domain account, however the problem is for normal operation the currently logged in user is a local kiosk user for assigned access that the domain file server does not recognize.
I've also tried using the following, however it prompts for user input. As this is run as a scheduled task for background operation - this is unacceptable.
$Credentials = Get-Credential -UserName 'NTAUTHORITY\Anonymous Logon'
New-PSDrive -ErrorAction Stop -PSProvider "FileSystem" -Root "$RemoteFolder" -Name "$RemoteDriveLetter" -Credential $Credentials -Persist -Scope Global | Out-Null
I have enabled the local security policy option on the file server for "Network access: Let Everyone permissions apply to anonymous users".
How do I utilize the "anonymous" user connection with New-PSDrive?
-- edit --
I've also tried this
$Credentials = [pscredential]::Empty
New-PSDrive -ErrorAction Stop -PSProvider "FileSystem" -Root "$RemoteFolder" -Name "$RemoteDriveLetter" -Credential $Credentials -Persist -Scope Global | Out-Null
However, the output is:
>> TerminatingError(New-PSDrive): "The running command stopped because the preference variable "ErrorActionPreference" or common parameter is set to Stop: The specified network password is not correct"
The running command stopped because the preference variable "ErrorActionPreference" or common parameter is set to Stop: The specified network password is not correct
Anonymous mounts use an 'empty' user and password for the credential block so you can do the same.
This works for me and allows file creation on the share:
$User = " " # Create 'empty' username
$PWord = ConvertTo-SecureString -String " " -AsPlainText -Force
$Credentials = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $User, $PWord
New-PSDrive -PSProvider "FileSystem" -Root "$RemoteFolder" -Name "$RemoteDriveLetter" -Credential $Credentials -Persist -Scope Global | Out-Null
I'm trying to create a command to add a domain user to the local administrator group. I already have the command to do it:
Add-LocalGroupMember -Group "Administrators" -Member domain\user
or
net localgroup Administrators Domain\user /add
But I need to ask the user to insert him credentials when run the script. How do I do this?
Get-Credential is what you want:
$cred = Get-Credential
This will prompt the user to enter their username and password in a secure fashion. However...
You can't add a user to a group you aren't a member of, or at least have permissions delegated to manage members of that group (such as local Administrators). If the running user could do this already, entering their credentials wouldn't be required.
If the running user were already in Administrators, you would not need this either, just provide the target principal name (since adding yourself to the Administrators group requires that you already be in Administrators) and make sure your session is elevated.
Honestly, just use a Restricted Groups GPO to control domain users and their local group status. You don't want local users able to manage their local admin group in most situations anyways. If someone does change the membership, the change will gracefully revert on the next gpupdate interval.
You can use:
$Credentials = Get-Credential
It will give you windows login window.
Also there is a way to extract that data like this:
$Credentials = Get-Credential
$Credentials.Password | ConvertFrom-SecureString | Set-Content C:\test\password.txt
$Username = $Credentials.Username
$Password = Get-Content “C:\test\password.txt” | ConvertTo-SecureString
$Credentials = New-Object System.Management.Automation.PSCredential $Username,$Password
There is more in here:
https://sysadminguides.org/2017/05/02/how-to-pass-credentials-in-powershell/
Hope it helps ;-)
I am trying to run a powershell script from a TeamCity Windows Slave to another server for deploying my application.
This is BuildConfig:
username = "<username>"
$password = "<password>"
$secstr = New-Object -TypeName System.Security.SecureString;
$password.ToCharArray() | ForEach-Object {$secstr.AppendChar($_)}
$cred = new-object -typename System.Management.Automation.PSCredential -argumentlist $username, $secstr;
Invoke-Command -ComputerName "<computer_name>" -Credential $cred -FilePath "deploy.ps1"
I am getting the following error.
following error message : Logon failure: unknown user name or bad password.
[13:57:52] [Step 1/1] For more information, see the about_Remote_Troubleshooting Help topic.
I have used the correct User name and password only.
I have also checked the Local User security policies. Am I missing something?
Is it just a paste error that missed the $ from username ?
Does the user name and password work fine outside the script ?
Are the variables being substituted in properly. Do the logs show ?
I’ve never used that construct to make a pscredential before. Is this one mentioned here not working.
https://pscustomobject.github.io/powershell/howto/PowerShell-Create-Credential-Object/
I need to be able to allow users from a remote domain to change their password and I cannot install RSAT tools and the machine they will be working on.
I have tried an Invoke-Command passing domain admin credentials to run some code on a domain controller however I cannot get Invoke-Command to authenticate.
$InvUsername = "admin"
$InvPassword_Text = "adminpassword"
$InvPassword = ConvertTo-SecureString -AsPlainText $InvPassword_Text -Force
$InvCreds = New-Object System.Management.Automation.PSCredential -ArgumentList $InvUsername,$InvPassword
$InvSession = New-PSSession -ComputerName 'DC01.domain.co.uk' -Credential $InvCreds
New-PSSession -ComputerName 'DC01.domain.co.uk' -Credential $InvCreds
New-PSSession : [DC01.domain.co.uk] Connecting to remote server DC01.domain.co.uk failed with the following error message : The user name or password is incorrect.
The password is not incorrect BTW.
Do you need to create a new remote PowerShell session to do it? Are you able to contact one of the domain controllers directly?
You could try using .NET's DirectoryEntry and passing credentials. If you know the distinguishedName of the account:
$user = New-Object System.DirectoryServices.DirectoryEntry("LDAP://CN=user,DC=example,DC=com", $username, $password)
$user.Invoke("SetPassword","NewPassword123")
You may also have to tell it to explicitly connect through the LDAPS (LDAP over SSL) port like this:
$user = New-Object System.DirectoryServices.DirectoryEntry("LDAP://DC01.domain.co.uk:636/CN=user,DC=example,DC=com", $username, $password)
But that also assumes that LDAPS is setup correctly with a certificate your computer trusts.
I'm trying to write a batch script to automatically change the password of an active directory user.
The:
net user <user> /domain <password>
where <user> & <password> are a user and password of some user on the domain.
Results in:
The request will be processed at a domain controller for
domain .
System error 5 has occurred.
Access is denied.
Edit:
I just found out that you need to be the domain controller to be able to run the command.
Is the a way to change a user's password without being the domain controller?
IT Admins with permissions to change passwords can use the QAD Powershell cmdlets to change passwords for accounts. Here’s an example of the Powershell command to run:
Set-QADUser -Identity <account_name> -Proxy -UserPassword <new_password>
For users without elevated permissions to set passwords on other accounts, there is still a Powershell option. You will need to have the Microsoft ActiveDirectory powershell module installed and know the previous password. Here’s some sample code how to accomplish this:
Set-ADAccountPassword -Identity <ADAccount>
This will then prompt for the previous password, and then ask for the new password twice.
For example if you want your process perform automatically:
Set-ADAccountPassword -Identity $username -OldPassword (ConvertTo-SecureString -AsPlainText $oldPass -Force) -NewPassword (ConvertTo-SecureString -AsPlainText $newPass -Force)