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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Marker.C

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Marker.C
Technical name:W97M/Marker.C
Threat level:Low
Type:Virus
Effects:  

It infects Word's global template and disables the macro antivirus portection in these documents.

Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95

Detection updated on:Feb. 22, 1999
StatisticsNo
Family:MARKER

Brief Description 

    

Marker.C is a macro virus that infects Word's global template (NORMAL.DOT file) and all the documents generated with it. By doing so, it will infect all the documents that the user opens, closes, saves, etc.

When Marker.C is run, it disables the macro antivirus protection. This means that the dialog box that prompts the user to enable or disable the macros that the document contains, is not displayed. By doing so, Marker.C prevents the user from disabling the macro used by the virus to carry out its infections.

Marker.C reaches computers in an infected Word document (a file with a DOC extension), using the typical means of virus transmission, among others, floppy disks, CD-ROMs, e-mail messages with attached files, Internet downloads, FTP, IRC channels, peer-to-peer (P2P) file sharing networks, etc.

Visible Symptoms 

    

Marker.C is difficult to recognize, as it does not display any messages or warnings that indicate it has reached the computer.

However, a clear indication that Marker.C has infected those documents containing macros, is that the warning messages that allow Word documents to be opened without enabling their macros, are disabled.