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

Anderson Johnston andy at umbc.edu
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

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

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Internet Security Systems Security Brief
August 1, 2003

"Mimail" Mass-Email Worm Propagation

Synopsis:

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.

Impact:

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:
http://xforce.iss.net/xforce/alerts/id/149
______

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
worldwide.

Permission is hereby granted for the electronic redistribution of this
document. It is not to be edited or altered in any way without the
express written consent of the Internet Security Systems X-Force. If you
wish to reprint the whole or any part of this document in any other
medium excluding electronic media, please email xforce at iss.net for
permission.

Disclaimer: The information within this paper may change without notice.
Use of this information constitutes acceptance for use in an AS IS
condition. There are NO warranties, implied or otherwise, with regard to
this information or its use. Any use of this information is at the
user's risk. In no event shall the author/distributor (Internet Security
Systems X-Force) be held liable for any damages whatsoever arising out
of or in connection with the use or spread of this information.
X-Force PGP Key available on MIT's PGP key server and PGP.com's key server,
as well as at http://www.iss.net/security_center/sensitive.php
Please send suggestions, updates, and comments to: X-Force
xforce at iss.net of Internet Security Systems, Inc.



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