Also known as W32.Watchit, this worm is more of an annoyance than an actual danger.
Christmas has come early in the world of Internet viruses. Navidad is a worm from South America that infects users of Microsoft Outlook. The attachment is an .exe file that installs an eyeball icon in the lower right hand corner of the Windows desktop. Navidad does not contain a dangerous payload, however it does make several changes to the Windows Registry file.
How It Works
Navidad is an e-mail worm that arrives in the Outlook Inbox as a reply to a message previously sent. The attached file is NAVIDAD.EXE, and clicking on this attachment will load the worm. While loading, an error dialog box will appear on the screen. Navidad contains a bug in its own programming, and when that part of the program loads, the letters "UI" display in a dialog box. To remove the dialog box, Windows users typically click "OK," however, in doing so, the Navidad worm continues to load.
Navidad reads all the e-mail addresses listed in Outlook as well as any MAPI clients installed, copying and sending itself out via e-mail as replies. Navidad also makes several changes to the Windows Registry, therefore, removing this worm should be done with great care. Please read the detailed removal instructions available from McAfee or Trend Micro.
