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Trojan:W32/BotVoice.A


First posted on 11 July 2007.
Source: SecurityHome

Aliases :

Trojan:W32/BotVoice.A is also known as Trojan.Botvoice, TROJ_BOTVOICE.A.

Explanation :

This Trojan removes program associations for several file types preventing these files from opening. It also makes use of the Microsoft Text-To-Speech (TTS) technology to play a text message as its payload.

Execution and Installation

Upon execution, this destructive Trojan drops the following file:


This non-malicious file is used as part of the Trojan's payload.

It then modifies the following registry keys:


By replacing the default values with the following string:


Note: These registry keys may be added if they currently do not exist in the system.

The above modifications disable program associations for the following file types preventing the proper execution of such files:


It also modifies the default value of following registry key:


The Trojan sets the following registry entries to disable Task Manager and Registry Editor:


By default these values are not present, in which case they are added by the Trojan.

The Trojan then terminates the following processes:


File Deletion

The Trojan then attempts to delete all the files in the following directory:


As well as all the files under the following user directories:


The location of these folders are derived under the following registry key:


If a restricted or protected file is encountered, the deletion routine stops for that specific directory.

Payload

The Trojan uses the Microsoft Text-To-Speech (TTS) technology to play the following text:


The Trojan also displays a message box if it is being debugged:

Last update 11 July 2007

 

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