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Date: Tue, 10 Feb 2004 13:29:51 -0500 (EST)
From: "David F. Skoll" <dfs@...ringpenguin.com>
To: "Richard M. Smith" <rms@...puterbytesman.com>
Cc: "BUGTRAQ@...URITYFOCUS. COM" <BUGTRAQ@...urityfocus.com>
Subject: Re: Why are postmasters distributing the MyDoom virus?


On Sat, 7 Feb 2004, Richard M. Smith wrote:

> I was looking over the MyDoom email messages that I received today and found
> about 15 copies of the worm which came from postmasters in bounce messages.
> Some postmasters, when sending out a bounce message, include the original
> email message as an attachment.  If a bounce message is for a
> MyDoom-infected message, the bounce message will sometimes include an intact
> copy of the MyDoom executable which can be run by mistake with a few mouse
> clicks.

This is sometimes unavoidable.  A lot of MyDoom's go to nonexistent
recipients, and when they are failed with a 5xx failure code, the sending
relay (quite reasonably) includes the original message in the bounce.

Regards,

David.


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