Navidad virus
Encyclopedia
W32.Navidad is a mass-mailing worm program or virus designed to spread through email clients such as Microsoft Outlook
Microsoft Outlook
Microsoft Outlook is a personal information manager from Microsoft, available both as a separate application as well as a part of the Microsoft Office suite...

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It replies to all emails with an attachment using the original subject line.

Source

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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