So what your Script does is wait for a drive to show up with the label "Ducky"? Seems like that's the case. So, I'd use this until it recognizes the "Ducky," then I'd have it execute the .jar file inside. Seems pretty udnerstandable once I get the hand of it.
Sorry for all the questions, I'm pretty new to this.
@overwraith
Although I'm new to Ducky, I CAN crypt an .exe file for you (as I saw a different thread of yours about it).
If you want me to, shoot me a message (the output would be FUD to all AV's as you were hoping for).