Think twice before opening a Microsoft Word file that is attached to an email. It could contain a virus, which you might activate just by opening the file.

Why viruses are dangerous

Computer viruses are like small software programs. Typically, they are downloaded inadvertently, as they are buried in a file. When you open the file, the virus activates. The consequences can be serious. It may:

• Damage your system
• Steal your identity information
• Infect files that you send out
• Send itself to everyone in your address book, with your return address

Computer viruses and other forms of malicious software ("malware") cause billions of dollars in damage each year and untold anguish for victims of identity theft.

Why Word is vulnerable

Because Word files are commonly exchanged, Word viruses have become widespread. Here’s how it works:

• Microsoft Word files contain small programs called "macros," which are customizable shortcuts that automate tasks such as formatting text or applying bullet lists.
• The macro programming language can also be used to write viruses.
• The virus can be sent as part of a Word document.
• The virus automatically activates when you open the Word file.

How hackers trick you

Hackers use a variety of ruses to persuade you to open a virus-infected Word file. They may:

• Spoof the address of a friend, a business, or that special someone you met at a bar last week.
• Pretend to be an important message from your bank, the IRS, or a lottery you’ve won.
• Use topical lures. Last year, for example, when worldwide attention was focused on pro-democracy protests in Myanmar, hackers circulated an infected Word file purporting to be a message of support from the Dalai Lama.

How to protect yourself

• Only open email attachments that are expected and that come from a trusted source.
• Use an Internet security solution, such as Norton Internet Security™, that automatically scans email attachments for viruses and other malicious software before opening them.
• Delete any suspect messages without opening them.
• Do not click Web links or download files sent by someone you do not know, either in email or IMs.

Conclusion

Be wary of any file sent to you as an email attachment, even an innocent-looking Microsoft Word file. These files could contain viruses or other malicious software that might damage your system or steal your identity information. Always use Internet security programs to protect against viruses, spyware, and spam.

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