Mac Swapper Demon?

Yesterday, I opened up my my account settings from preferences and i found there was something called a mac swapper demon. I went to the folder where it said it was located, although I couldn't see it there at all, so from the login items i clicked reveal in finder, and i deleted it that way, but i'm not sure if it has gone. Does anybody know what this is? is it harmful? I dont think it was there before and I have no idea how it has been installed.