ISS Security Brief: UPDATED Sobig.F Mass-Email Worm - Trojan Horse Functionality
From: X-Force (xforce_at_iss.net)
To: firstname.lastname@example.org Date: Fri, 22 Aug 2003 13:14:38 -0400 (EDT)
-----BEGIN PGP SIGNED MESSAGE-----
Internet Security Systems Security Brief
August 22, 2003
Sobig.F Mass-Email Worm - Trojan Horse Functionality
The latest variant in the "Sobig" family, Sobig.F is propagating
aggressively across the Internet. Sobig.F is propagating via email only,
and it is not related to the recent spate of Internet worms. Sobig.F
employs some new techniques to attempt to evade anti-virus software, and
infected computers may be controlled by external third-parties. It
contains hidden functionality that attempts to download and execute a file
at a specific time.
Aggressive propagation of mass-email worms have been known to cause
localized email outages due to the load placed on email servers. Sobig.F
contains backdoor code which may allow the author or originator of the worm
to control infected computers. This may allow the author to steal
information, run specific Trojan horse programs, or install unsolicited
email (Spam) relays. The new file payload is currently unknown as the virus
receives a URL to the new file at a certain time (3:00pm EDT).
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
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 email@example.com for
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
firstname.lastname@example.org of Internet Security Systems, Inc.
-----BEGIN PGP SIGNATURE-----
-----END PGP SIGNATURE-----