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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Marker.AD

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Marker.AD
Technical name:W97M/Marker.AD
Threat level:Low
Type:Virus
Effects:  It infects Word documents and the global template. It disables the macro virus protection and prevents the user from working with them
Affected platforms:

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

Detection updated on:Oct. 16, 2001
StatisticsNo
Family:VALENTIN

Brief Description 

    

Marker.AD is macro virus that infects Word documents as well as the global template.

Marker.AD uses the means normally used by macro viruses to spread. First of all, it infects the NORMAL.DOT global template. From then on, it will infect every word document that is opened, closed or stored in the affected computer.

In addition, Marker.AD disables certain Word options, depending on the system date.

Visible Symptoms 

    

Marker.AD is very easy to recognize, as it carries out the following actions:

  • When the system date is February 15, it deletes the contents of the current document and saves it, which means that all unsaved information will be lost
  • When the system date is the 13th of any month, Marker.AD changes the font of the current document to ‘Webdings’ and saves the document, so it will be unreadable.