-----BEGIN PGP SIGNED MESSAGE----- Internet Security Systems Security Brief August 22, 2003
Sobig.F Mass-Email Worm - Trojan Horse Functionality Synopsis: 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. Impact: 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: http://xforce.iss.net/xforce/alerts/id/151 ______ 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] of Internet Security Systems, Inc. -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBP0ZPMjRfJiV99eG9AQGnlgP/ZFrXKc0rEWxlViWWGyf7nbHm+ENF3x4a dZ6WBJDhJka3XB48RcUs+ICfG3SDzuSYFpPbtjKbwuARA85m2aJqjLqwoCoZpf4Q yMYQPbo0CoEVUYn8UogKbgpES1wH5LcZ4JD2XIRLAINUp5CUQlw4yWTEEPdiAqfU Z3/qmMPyE4k= =UHAz -----END PGP SIGNATURE----- _______________________________________________ ISSForum mailing list [EMAIL PROTECTED] TO UNSUBSCRIBE OR CHANGE YOUR SUBSCRIPTION, go to https://atla-mm1.iss.net/mailman/listinfo
