Ok so after some searching I created the following PowerShell script to replace the default image for the login page - this works fine for a single user I thought by replacing the image in the Windows/web folder with my own any new users would have the same image but they get the standard image so I am stuck
Code:
$code = @"
using System;
using System.Runtime.InteropServices;
namespace CosmosKey.Utils
{
public class TokenManipulator
{
[DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
internal static extern bool AdjustTokenPrivileges(IntPtr htok, bool disall,
ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen);
[DllImport("kernel32.dll", ExactSpelling = true)]
internal static extern IntPtr GetCurrentProcess();
[DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
internal static extern bool OpenProcessToken(IntPtr h, int acc, ref IntPtr
phtok);
[DllImport("advapi32.dll", SetLastError = true)]
internal static extern bool LookupPrivilegeValue(string host, string name,
ref long pluid);
[StructLayout(LayoutKind.Sequential, Pack = 1)]
internal struct TokPriv1Luid
{
public int Count;
public long Luid;
public int Attr;
}
internal const int SE_PRIVILEGE_DISABLED = 0x00000000;
internal const int SE_PRIVILEGE_ENABLED = 0x00000002;
internal const int TOKEN_QUERY = 0x00000008;
internal const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;
public const string SE_ASSIGNPRIMARYTOKEN_NAME = "SeAssignPrimaryTokenPrivilege";
public const string SE_AUDIT_NAME = "SeAuditPrivilege";
public const string SE_BACKUP_NAME = "SeBackupPrivilege";
public const string SE_CHANGE_NOTIFY_NAME = "SeChangeNotifyPrivilege";
public const string SE_CREATE_GLOBAL_NAME = "SeCreateGlobalPrivilege";
public const string SE_CREATE_PAGEFILE_NAME = "SeCreatePagefilePrivilege";
public const string SE_CREATE_PERMANENT_NAME = "SeCreatePermanentPrivilege";
public const string SE_CREATE_SYMBOLIC_LINK_NAME = "SeCreateSymbolicLinkPrivilege";
public const string SE_CREATE_TOKEN_NAME = "SeCreateTokenPrivilege";
public const string SE_DEBUG_NAME = "SeDebugPrivilege";
public const string SE_ENABLE_DELEGATION_NAME = "SeEnableDelegationPrivilege";
public const string SE_IMPERSONATE_NAME = "SeImpersonatePrivilege";
public const string SE_INC_BASE_PRIORITY_NAME = "SeIncreaseBasePriorityPrivilege";
public const string SE_INCREASE_QUOTA_NAME = "SeIncreaseQuotaPrivilege";
public const string SE_INC_WORKING_SET_NAME = "SeIncreaseWorkingSetPrivilege";
public const string SE_LOAD_DRIVER_NAME = "SeLoadDriverPrivilege";
public const string SE_LOCK_MEMORY_NAME = "SeLockMemoryPrivilege";
public const string SE_MACHINE_ACCOUNT_NAME = "SeMachineAccountPrivilege";
public const string SE_MANAGE_VOLUME_NAME = "SeManageVolumePrivilege";
public const string SE_PROF_SINGLE_PROCESS_NAME = "SeProfileSingleProcessPrivilege";
public const string SE_RELABEL_NAME = "SeRelabelPrivilege";
public const string SE_REMOTE_SHUTDOWN_NAME = "SeRemoteShutdownPrivilege";
public const string SE_RESTORE_NAME = "SeRestorePrivilege";
public const string SE_SECURITY_NAME = "SeSecurityPrivilege";
public const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege";
public const string SE_SYNC_AGENT_NAME = "SeSyncAgentPrivilege";
public const string SE_SYSTEM_ENVIRONMENT_NAME = "SeSystemEnvironmentPrivilege";
public const string SE_SYSTEM_PROFILE_NAME = "SeSystemProfilePrivilege";
public const string SE_SYSTEMTIME_NAME = "SeSystemtimePrivilege";
public const string SE_TAKE_OWNERSHIP_NAME = "SeTakeOwnershipPrivilege";
public const string SE_TCB_NAME = "SeTcbPrivilege";
public const string SE_TIME_ZONE_NAME = "SeTimeZonePrivilege";
public const string SE_TRUSTED_CREDMAN_ACCESS_NAME = "SeTrustedCredManAccessPrivilege";
public const string SE_UNDOCK_NAME = "SeUndockPrivilege";
public const string SE_UNSOLICITED_INPUT_NAME = "SeUnsolicitedInputPrivilege";
public static bool AddPrivilege(string privilege)
{
try
{
bool retVal;
TokPriv1Luid tp;
IntPtr hproc = GetCurrentProcess();
IntPtr htok = IntPtr.Zero;
retVal = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);
tp.Count = 1;
tp.Luid = 0;
tp.Attr = SE_PRIVILEGE_ENABLED;
retVal = LookupPrivilegeValue(null, privilege, ref tp.Luid);
retVal = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);
return retVal;
}
catch (Exception ex)
{
throw ex;
}
}
public static bool RemovePrivilege(string privilege)
{
try
{
bool retVal;
TokPriv1Luid tp;
IntPtr hproc = GetCurrentProcess();
IntPtr htok = IntPtr.Zero;
retVal = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);
tp.Count = 1;
tp.Luid = 0;
tp.Attr = SE_PRIVILEGE_DISABLED;
retVal = LookupPrivilegeValue(null, privilege, ref tp.Luid);
retVal = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);
return retVal;
}
catch (Exception ex)
{
throw ex;
}
}
}
}
"@
# Take ownership
add-type $code
[void][CosmosKey.Utils.TokenManipulator]::AddPrivilege([CosmosKey.Utils.TokenManipulator]::SE_RESTORE_NAME)
$file = "c:\Windows\Web\Screen\img100.jpg"
$user = $env:username
$Account = New-Object System.Security.Principal.NTAccount($user)
$FileSecurity = new-object System.Security.AccessControl.FileSecurity
$FileSecurity.SetOwner($Account)
[System.IO.File]::SetAccessControl($file, $FileSecurity)
[void][CosmosKey.Utils.TokenManipulator]::RemovePrivilege([CosmosKey.Utils.TokenManipulator]::SE_RESTORE_NAME)
# copy file permissions
$Acl = Get-Acl "C:\Users\Test"
Set-Acl "C:\Windows\Web\Screen\img100.jpg" $Acl
Unblock-File -Path "C:\Windows\Web\Screen\img100.jpg"
# Replace image file
Get-Item -Path C:\screen\img100.jpg
Copy-Item -Path C:\screen\img100.jpg -Destination C:\Windows\Web\Screen -Recurse -force
# Set registry key
$path = "HKLM:\SOFTWARE\Policies\Microsoft\Windows\Personalization"
$img = "C:\Windows\System32\screen.jpg"
Set-ItemProperty -Path $path -Name LockScreenImage -value $img
Quote