Heh, there's a chance it might be one of mine, the coding looks slightly familiar and there's loads out there.
If it is though, it's mutated beyond my recognition. That third line looks totally mulched.
EDIT: Started up IM, and the first thing that comes in is an enormous clump of infected alga from shvarz. Damn, those things are nasty. I shudder to think what else is out there, especially with mutated strains and such. Looks like some sort of antivirus is mandatory from now on:
cond
*.mkvirus 0 !=
start
*.mkvirus .delgene store
stop