check_login.ps1

foreach($line in Get-Content .\users.txt) {
  Add-Type -AssemblyName System.DirectoryServices.AccountManagement
  $DS = New-Object System.DirectoryServices.AccountManagement.PrincipalContext('domain')

  $username = $line.Trim()
  $password = $username.ToLower()

  $success=$DS.ValidateCredentials($username, $password)

  if ($success)
  {
    write-output -ForegroundColor Green "[+] User $username uses $password"
  }
  else
  {
     #write-output  -ForegroundColor Red "[-] User $username"
  }
}