Oh wait! I see it. "Steven Spielberg gets a hilarious prank phone call.wma.exe"
is 417,792 bytes long and the hash is QQO5HUWADDEOUOOFR2I4GIMREY4Z67ZG.

Let's see what we have here… Aha, it's a Worm called Delf.ATB.
Might as well start up the main RADAR and see how many copies are out there.

Okay, looks like it started just a week ago. They must have been using infected
machines to seed it because I have already blocked virtually all of the current
sources. It isn't spreading very fast yet. Good thing you caught it so quickly.