F-SECURE: Tips To Avoid Computer Worms ______________________________________________________________ F-Secure Media Release from November 21, 2000, are advising the public on how to avoid computer worms. "An up-to-date anti-virus program is still you best protection against worms and other types of viruses," says Mikko Hypponen, Manager of Anti-Virus Research at F-Secure. "However, there is a lot the end user can do to make his computing safer." The risk of getting infected by new and unknown worms can be minimized by following the following tips. TIPS TO AVOID COMPUTER WORMS 1. Most of the worms which use e-mail to propagate use Microsoft Outlook or Outlook Express to spread. If you need to use Outlook, download and install the latest Outlook security patch from Microsoft. In general, keep your operating system and applications up-to-date and apply the latest patches when they become available. Be sure to get the updates directly from the vendor. 2. When possible, avoid e-mail attachments both when sending and receiving e-mail. 3. Configure Windows to always show file extensions. In Windows 2000, this is done through Explorer via the Tools menu: Tools/Folder Options/View - and uncheck "Hide file extensions for known file types". This makes it more difficult to for a harmful file (such as an EXE or VBS) to masquerade as a harmless file (such as TXT or JPG). 4. Never open e-mail attachments with the file extensions VBS, SHS or PIF. These extensions are almost never used in normal attachments but they are frequently used by viruses and worms. 5. Never open attachments with double file extensions such as NAME.BMP.EXE or NAME.TXT.VBS 6. Do not share your folders with other users unless necessary. If you do, make sure you do not share your full drive or your Windows directory. 7. Disconnect your network or modem cable when you're not using your computer - or just power it down. 8. If you feel that an e-mail you get from a friend is somehow strange - if it is in a foreign language or if it just says odd things, double-check with the friend before opening any attachments. 9. When you receive e-mail advertisements or other unsolicited e-mail, do not open attachments in them or follow web links quoted in them. 10. Avoid attachments with sexual filenames. E-mail worms often use attachments with names like PORNO.EXE or PAMELA_NUDE.VBS to lure users into executing them. 11. Do not trust the icons of attachment file. Worms often send executable files which have an icon resembling icons of picture, text or archive files - to fool the user. 12. Never accept attachments from strangers in online chat systems such as IRC, ICQ or AOL Instant Messenger. 13. Avoid downloading files from public newsgroups (Usenet news). These are often used by virus writers to distribute their new viruses. More information on these latest worms (as of 23-Nov-2000) is available from: Navidad: http://www.F-Secure.com/v-descs/navidad.htm Hybris: http://www.F-Secure.com/v-descs/hybris.htm Music: http://www.F-Secure.com/v-descs/music.htm BleBla: http://www.F-Secure.com/v-descs/blebla.htm F-Secure Anti-Virus detects and disinfects these worms. About F-Secure Corporation F-Secure Corporation is a leading provider of centrally managed security for today's mobile, wireless enterprise. The company offers a full range of award-winning, integrated anti-virus, file encryption, distributed firewall and VPN solutions for workstations, servers, gateways and mobile devices. F-Secure products are uniquely suited for delivery of Security as a ServiceTM which provides invisible, reliable, always-on, and up-to-date security for the most widely distributed user base. Whether provided by corporate IT or delivered by service providers, F-Secure solutions extend policy-based security and instant alerts to all devices where information is created, stored or accessed. Founded in 1988, F-Secure Corporation is listed on the Helsinki Stock Exchange [HEX: FSC]. The company is headquartered in Espoo, Finland with North American headquarters in San Jose, California, as well as offices worldwide. For more information, please contact USA: F-Secure Inc. Mr. Steve Gottwals, Senior Product Marketing Manager 675 N. First Street, 5th Floor San Jose, CA 95112 Tel +1 408 938 6700, fax +1 408 938 6701 Email: Steve.Gottwals@F-Secure.com Finland: F-Secure Corporation Mr. Mikko Hypponen, Manager, Anti-Virus Research. PL 24 FIN-02231 ESPOO Tel +358 9 8599 0513 Fax +358 9 8599 0599 E-mail: Mikko.Hypponen@F-Secure.com http://www.F-Secure.com/ Top of Page