Worm/Script detection is garbage.
Yes, it's my personal opinion, but I'm right!!!
Anyhow, a worm/script detection can easily detect a simply mIRC script as a trojan if certain condition are met. I had a simple backup script that compressed our trivia bot's scores and questions and certain other things and then sent those to a couple other ops as a safety measure. That script was considered a trojan because of what it does.
As far as I'm concerned worm/script detection is more trouble than it is worth.