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Virus Profile: W97M/Digma

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 12/15/2000
Date Added: 12/22/2000
Origin: Unknown
Length: N/A
Type: Virus
Subtype: Macro
DAT Required: 4113
Removal Instructions
   
 
 
   

Description

This is a virus detection. Viruses are programs that self-replicate recursively, meaning that infected systems spread the virus to other systems, which then propagate the virus further. While many viruses contain a destructive payload, it's quite common for viruses to do nothing more than spread from one system to another.

Indication of Infection

Word documents altered on the 13th of the month

Methods of Infection

The virus writes its code to the global template, "Normal.dot". Once the global template is infected, all documents used on the system will become infected.

Aliases

W97M_DIGMA.A (Trend)
   

Virus Characteristics

This virus propagates by infecting Word Documents in Microsoft Word97 and Word2000. The virus consists of a module, "NewMacros". When an infected document is opened the virus performs the following tasks:

- Disable Word's macro warning prompt
- Disable Word's save normal template prompt
- Sets Word's display recent files to 4

On the 13th day of the month, when Word is exited and a document is open, these events take place:

- All instances of the letter "a" and "o" get replaced with the word F##K
- Text gets inserted at the front of the document:

DIGITAL
MADMAN

   
Use current engine and DAT files for detection and removal.

It is very common for macro viruses to disable options within Office applications for example in Word, the macro protection warning commonly is disabled. After cleaning macro viruses, ensure that your previously set options are again enabled.

AVERT Recommended Updates:

* Office 2000 updates

* Malformed Word Document Could Enable Macro to Run Automatically (Information/Patch)

   

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