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Technical support article

About the VBS.Onthefly (Anna Kournikova)



The "VBS/OnTheFly" malicious code is a VBScript program that spreads via email. This malicious code can infect a system if the enclosed email attachment is run. Users who receive copies of the code via electronic mail will probably recognize the sender. We encourage users to avoid executing code, including VBScripts, received through electronic mail, regardless of the sender's name, without prior knowledge of the origin of the code or a valid digital signature.

It is possible for the recipients to be be tricked into opening this malicious attachment since file will appear without the .VBS extension if "Hide file extensions for known file types" is turned on in Windows.

Also known as VBS/SST, the virus initially poses as an attachment--AnnaKournikova.jpg.vbs--included in a message with one of three similar subject lines: "Here you are ;-)," "here you have ;o)" and "here you go ;-)."

The virus uses the Visual Basic scripting language to infect Windows systems and then, on systems using Microsoft's Outlook e-mail program, mails itself out to the entire address book. The ability to mail itself out to a large number of Internet users classifies the virus as a worm. When run the worm creates the registry key: HKEY_CURRENT_USER\Software\OnTheFly . If the day is January 26, the worm attempts to direct your Web browser to an Internet address in The Netherlands. Next, it checks to see if the mass-mailing routine has been executed. If not, the worm E-mails everyone in your Microsoft Outlook address book and creates the registry key: HKEY_CURRENT_USER\Software\OnTheFly\mailed . This prevents the mail routine from running again. The worm then remains running, and if it is deleted, it attempts to recreate itself. Due to a bug in the code, the worm instead recreates itself as a zero-byte file.

To remove the virus, consult your anti-virus software manual about updating virus definitions and then have it scan your machine. If you are unsure how to do this, contact the provider of your anti-virus software.

For more information on virus updates and anti-virus software, visit our Virus Information section.


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