Microsoft Hoax/Virus/Update?

I got two e-mails today from “microsoft.” The first one is below:
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The second e-mail I got was pretty much the same thing, only difference was the

From: “Network Security Division” <[email protected]>
Date: 2003/09/19 Fri PM 02:13:38 EDT
To: “Client” <[email protected]>
Subject: New Microsoft Pack

And then the attachment was qtm.exe

Rather odd. I didn’t run either of them, but I just wanted to know if anyone has more information on this subject… Is this a virus? Or is it really an update?

[UPDATE]A third e-mail has arrived:

From: “Program Security Division” <[email protected]>
Date: 2003/09/19 Fri PM 03:27:27 EDT
To: “MS Customer” <[email protected]>
Subject: Current Network Update

With the attachment installation1.exe[/UPDATE]

It is a virus: http://www.techweb.com/wire/story/TWB20030919S0005