Microsoft KB Archive/211607

= Frequently asked questions about Word macro viruses =

Article ID: 211607

Article Last Modified on 1/25/2007

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APPLIES TO


 * Microsoft Office Word 2007
 * Microsoft Office Word 2003
 * Microsoft Word 2002 Standard Edition
 * Microsoft Word 2000 Standard Edition

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This article was previously published under Q211607



SUMMARY
This article answers some of the more frequently asked questions concerning Word macro viruses.



MORE INFORMATION
 Q. What are Word macro viruses?

Macro viruses are computer viruses that use an application's own macro programming language to distribute themselves. These macros have the potential to inflict damage to the document or to other computer software. These macro viruses can infect Word files as well as any other application that uses a programming language.

Unlike operating system viruses, macro viruses do not infect programs; they infect documents and templates. When you open a document or template that contains a macro virus, the virus infects your system and spreads to other documents and templates on your system.

Some macro viruses are annoying but not harmful; others can be very destructive. Also, Word macro viruses can spread across platforms; for example, the macro virus can infect files on the Windows platform as well as on the Macintosh platform. For more information about macro viruses, visit the following Microsoft Web sites:  Microsoft Office 2003 Editions Security White Paper

http://www.microsoft.com/technet/prodtechnol/office/office2003/operate/o3secdet.mspx

 Office XP Document: Macro Security White Paper

http://office.microsoft.com/downloads/2002/offxpsec.aspx

  Q. How can I determine whether I have a Word macro virus?

It is not always easy to determine whether you have a macro virus. If you are familiar with the Word macros on your system, you can look through the various macros for ones that you do not recognize. One or more of them may be part of a macro virus that has infected your system. Some examples of this type of macro name are AAAZAO, AAAZFS, AutoOpen, FileSaveAs, and PayLoad.

Some other things to look for include the following:  Unexplainable behavior on your system. For example, you may be prompted for a password on a file that you know does not require a password, or your document may be unexpectedly saved as a template. Unusual or unexplainable messages that appear in a dialog box.</li> Unusual changes to your documents; for example, the macro virus may randomly move three words and then insert the word "WAZZU" at random locations.</li> Menu items missing from the Word menus.</li></ul>

For more information about what to do if you think you have a Word macro virus, click the following article number to view the article in the Microsoft Knowledge Base:

211800 How to deal with a macro virus in Word 2000 or Word 2002

</li> Q. How did I get the macro virus?

You worked with a file (document or template) that was infected with a Word macro virus. An infected file can be obtained through any of the following ways:  Sharing files on disk</li> Sharing files on a network</li> Opening a file that is an e-mail attachment</li> Downloading a file via a modem and then opening the file</li> Downloading a file via the Internet or an intranet and then opening the file</li></ul>

To help prevent a macro virus from infecting your system or to clean a macro virus off your system, install an antivirus software program. For more information about third-party virus protection programs, click the following article number to view the article in the Microsoft Knowledge Base:

49500 List of antivirus software vendors

</li> Q. If I have a Word macro virus on my system, can I accidentally spread the macro virus to others?

Yes. You can spread a virus if you share files with others. A macro virus embeds itself into your file and can, most commonly, spread to others if you share files from a disk, network drive, external drive media, or other file transfer method. Files exchanged over the Internet can also spread the macro virus.</li> Q. I have Word and it always prompts me about the file I am opening containing macros. I don't share files or disks with others, I don't even download files from the Internet. Can I prevent Word from prompting me all the time with this warning?

Yes. You can change the security level in Microsoft Word so that Word does not prompt you to "enable" or "disable" macros. However, Microsoft does not recommend that you set the security level to Low. For more information about how to change the security level in Microsoft Word, click the following article number to view the article in the Microsoft Knowledge Base:

233396 How to reduce the chances of macro virus infection in Word

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Additional query words: protect protection protection.doc protecting protects execute only executable WD WD2003 WD2007 WD2002 WD2000

Keywords: kbdownload kbfaq kbinfo kbvirus KB211607

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