-- Generic OMG ITS A VIRUS! reply --

_____ is not a virus, unless it inserts itself into executable code on a system, so that when that code is executed, it replicates the virus to other executable code.
This definition corresponds rather neatly to a biological virus, which inserts it's R/DNA into a living cell, so that when that cell operates on all R/DNA present, it replicates the virus and releases new copies of it.

-- End generic response --

You could call this all sorts of things. Including a virus, if you insist. But to call it a virus is to be simply wrong. If you suspect it is malicious, then you could call it a trojan. If not, then it seems the best term would be "a piece of software that crashes," or perhaps, "a piece of software with a bug."