Nasty was a trojan! But this was back before the time these things became well known. The idea was to install it in some student labs and borrow all sorts of useful information by pretending to be the Macintosh Finder. I won't comment further on this. It was never finished and never used, but only because of lack of time. There was a bit of a culture of revolt against the establishment when I was a student - ah, those were the days!