ISS Security Brief: "Mimail" Mass-Email Worm Propagation (fwd)

Anderson Johnston andy at
Fri Aug 1 20:15:41 GMT 2003

I thought I'd pass this on in case anyone missed it.

We're getting lots of calls from upset users just about the message that
their accounts are expiring.

						- andy

** Andy Johnston (andy at          *            pager: 410-678-8949  **
** Manager of IT Security                 * PGP key:(afj2002) 4096/8448B056 **
** Office of Information Technology, UMBC *   4A B4 96 64 D9 B6 EF E3 21 9A **
** 410-455-2583 (v)/410-455-1065 (f)      *   46 1A 37 11 F5 6C 84 48 B0 56 **

---------- Forwarded message ----------
Date: Fri, 1 Aug 2003 15:15:41 -0400 (EDT)
From: X-Force <xforce at>
To: alert at
Subject: ISS Security Brief: "Mimail" Mass-Email Worm Propagation


Internet Security Systems Security Brief
August 1, 2003

"Mimail" Mass-Email Worm Propagation


ISS X-Force has detected the spread of a mass-emailing worm named
"Mimail". The Mimail worm is currently propagating aggressively across the
Internet.  Mimail takes advantage of a vulnerability in Internet Explorer
to hide an executable program within what appears to be a benign HTML file
delivered to recipients via email.


The executable payload of the worm is hidden within a HTML file that is
delivered in a compressed ZIP archive. Many Internet users believe that
HTML files are not dangerous. The Mimail worm was designed specifically to
appear to be benign, and to execute via a flaw in Internet Explorer.
Viruses or worms that propagate by exploiting flaws in software are
particularly dangerous, and they generally propagate more effectively.

For the complete ISS X-Force Security Alert, please visit:

About Internet Security Systems (ISS)
Founded in 1994, Internet Security Systems (ISS) (Nasdaq: ISSX) is a
pioneer and world leader in software and services that protect critical
online resources from an ever-changing spectrum of threats and misuse.
Internet Security Systems is headquartered in Atlanta, GA, with
additional operations throughout the Americas, Asia, Australia, Europe
and the Middle East.

Copyright (c) 2003 Internet Security Systems, Inc. All rights reserved

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