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Virus Profile: W97M/Tarap

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 3/22/2000
Date Added: 4/5/2000
Origin: N/A
Length: N/A
Type: Virus
Subtype: Macro
DAT Required: 4072
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

On any day this message may appear:
"Tarapoto Virus 2000"
"The Dark is Ready... Este documento es una basura"

On 1st of any even month (i.e. February, April, June etc), this message may appear:
"TARAPOTO VIRUS/tpp.win"
"(UserName) : Tu Pc esta bajo mi control; Visita Tarapoto Ciudad de las Palmeras. Virus creado por 'The Dark' tpp e-mail thedarktpp"

On 1st of September, this virus attempts to delete "c:\command.com" and display this message:
"TARAPOTO VIRUS/tpp.win"
"Hoy cumple " (# equal to current year - 1979) " años mi creador 'The Dark' y por eso nadie trabaja hoy. "

Methods of Infection

This virus hooks Word events of closing documents, viewing VB Editor, clicking on menu options "Help|About", "Tools|Macro", "Tools|Customize|Keyboard" and "File|SaveAs". This virus intercepts calls to these selections in an effort to maximize chance of infection.

Aliases

W97M/TPPFORM
   

Virus Characteristics

This is a class module macro virus for Word97/2000 documents and templates. This virus exists within the first VB project named "ThisDocument" and also contains a form module named "tppform".

Comments within the virus code which are never displayed:
"Tarapoto Virus by the Darktpp"

This virus also performs a self check within the virus code for the comment "'The dark" before infecting global template. If the comment line exists, the virus assumes it has already infected NORMAL.DOT.

This virus contains some date activated payloads/message boxes which are mentioned below.

   
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:

SCANPM /ADL /CLEAN /ALL

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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