I cannot find anything that suggest it is a virus, and remember that the files a program install will not always have a name that relates to the program.
vpn could stand for Virtual Private Network, have you connected to any new network enviroments, installed file streaming software, that sort of thing?
Steve: N.M.N.F.
If something is popular, it must be wrong: Mark Twain
That's just perfectly normal Paranoia everyone in the universe has that: Slartibartfast