Virus Profile: W97M/

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 6/12/2000
Date Added: 7/6/2000
Origin: India
Length: N/A
Type: Virus
Subtype: Macro
DAT Required: 4083
Removal Instructions


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

Existence of the file "netacc.vxd" in the root of C: drive. Message box displayed on August 15 as mentioned above. Macro warning when opening infected documents and the macro warning option is enabled before hand.

Methods of Infection

This virus uses a self-check method of searching macro modules for a "signature" string - if the string is not matched, the virus infects the host document. The string match is "School Of Technology And Applied Sciences".

This virus hooks the Word event handler of opening documents in order to run its code.



Virus Characteristics

This is a class module macro virus for Word97/2000 documents. This virus does not contain a damaging payload. This virus contains a date activated payload of displaying a message box. This virus will lower the macro warning settings on the host system.

This virus writes a temp file to the root of the C: drive which contains the virus source code and transfers this to new host documents.

If the date is August 15, this message will be displayed:

"Independence Day"
"Today is Independence day."
"Vandhay Matharam!"

This virus writes user information to a file and sends this file via FTP to an FTP account. The information gathered are the following:

"Name: [UserName]"
"Address: [UserAddress]"
"Date & Time: [dddd, d mmm yyyy hh:mm:ss AMPM]"
"Processor Type: [ProcessorType]"
"Free Disk Space: [FreeDiskSpace]"

The information is gathered through the use of "system variables" or values which are available using reserved variable names.

This information is saved to a file in the root of C: as a random file name such as "su7892.sys". A script file is then created named "netacc.vxd" containing ftp account information (possibly the virus author). This virus then runs a shell process to ftp the information file to the ftp account. The account is named "surveyor" and is located on "".

These comments exist in the source of the virus code:

' Surveyor, Developed by:
' An MCA Student
' School Of Technology And Applied Sciences
' Mahatham Gandhi University Regional Center
' Edappally, Kochi 24
' 16th March 2000

All Users :
Script,Batch,Macro and non memory-resident:
Use current engine and DAT files for detection and removal.

PE,Trojan,Internet Worm and memory resident :
Use specified engine and DAT files for detection. To remove, boot to MS-DOS mode or use a boot diskette and use the command line scanner:


Additional Windows ME/XP removal considerations

Users should not trust file icons, particularly when receiving files from others via P2P clients, IRC, email or other mediums where users can share files.

AVERT Recommended Updates :

* Office2000 Updates

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

* scriptlet.typelib/Eyedog vulnerability patch

* Outlook as an email attachment security update

* Exchange 5.5 post SP3 Information Store Patch 5.5.2652.42 - this patch corrects detection issues with GroupShield

For a list of attachments blocked by the Outlook patch and a general FAQ, visit this link .
Additionally, Network Administrators can configure this update using an available tool - visit this link for more information .

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.


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