I think they can. However, the difficulty depends on how the scammers did the work. I mean, if the scammers are smart enough, they already thought the possibility of being traced and have made a way to avoid it from happening beforehand. Most likely it will be a long process if ever.

I suggest you to not join any signals group especially the paid ones. Aside from not knowing who's legit, imo signals are something like a trial and error or luck, it will not be correct consistently. Trading on your own would still be better and another advantage is that you'll learn for every trade you make