Removing Trojan Vundo with VundoFix.exe from

This section provides a tutorial example of how to remove trojan Vundo with VundoFix.exe from

My first choice failed. So I had to try my second choice: VundoFix.exe and instruction provided by at

1. Downloaded VundoFix.exe from

11/04/2006  09:56 AM            88,576 VundoFix.exe
File properties: 
   File version:
   Copyright: (C)

2. Ran VundoFix and clicked "Scan for Vundo". It scanned only the system directories and returned the results in a few minutes:


This was nice. VundoFix.exe was able to detect this Trojan Vundo perfectly. It also reported an extra file: \windows\system32\drivers\dp.sys. It was a hidden system file with a suspicious date (my friend got his computer in Oct. 2005):

DP.sys          12,288    7/24/2006  8:51 PM

3. I restarted the system in safe mode (Safe mode with command line prompt). This was not mentioned in's instruction. But I thought that removing viruses in safe mode is always a good idea.

4. Ran VundoFix.exe again from the command line and clicked "Scan for Vundo". I got the same list of infected files.

5. Clicked "Remove Vundo". It did some work and displayed a message saying: "vtsts.dll could not be deleted. VundoFix will load on reboot to attempt removal. Please click Remove Vundo when rebooted".

6. Clicked OK to let the system to reboot. VundoFix.exe started by itself. I clicked "Remove Vundo". It did some work and closed itself.

7. I Ran VundoFix.exe and did scan again. Surprisingly, it still reported two Vundo files:


8. This time, I clicked "Remove Vundo" right in the normal mode, no restarting in safe mode.

9. VundoFix.exe closed all other running processes, only leaving the desktop background image on the screen. After a couple of minutes, it shows a message saying "Done. Click OK to reboot the system".

10. Clicked OK. System rebooted without any problem.

Checking Result:

Looking at those suspicious files with File Explorer. They were all gone!

Scanning with HijackThis, it showed vtsts.dll with "file missing", (A good sign of successful removal!):

O2 - BHO: ATLDistrib Object - {93C6313C-9DB4-4694-8BD0-E378C573A9AD}
   - C:\WINDOWS\system32\vtsts.dll (file missing)

To get rid of this entry was easy. Select it in HijackThis and click "Fix checked".

At this point, trojan Vundo, the toughest adware I have ever seen, has been fully removed from my friend's Windows system!

Table of Contents

 About This Book

 Introduction to Microsoft Windows

 Introduction to Windows Explorer

 Introduction to Internet Explorer

 "Paint" Program and Computer Graphics

 GIMP - GNU Image Manipulation Program

 JPEG Image File Format Quality and Size

 GIF Image File Format and Transparent Background

 "WinZip" - ZIP File Compression Tool

 "WinRAR" - RAR and ZIP File Compression Tool

 FTP Server, Client and Commands

 "FileZilla" - Free FTP Client and Server

 Web Server Log Files and Analysis Tool - "Analog"

 Spyware Adware Detection and Removal

 IE Addon Program Listing and Removal

Vundo (VirtuMonde/VirtuMundo) - vtsts.dll Removal

 What Is Trojan Vundo

 Partial Removal of Trojan Vundo

 Detecting Trojan Vundo with McAfee VirusScan

 McAfee VirusScan and

 Instructions on Full Removal of Trojan Vundo

 Removing xxxxxxxx.dll Files Generated by Vundo

 What Is Vundo Related vtsts.dll

 Finding and Removing vtsts.dll Manually

 Removing Trojan Vundo with FixVundo.exe from Symantec

Removing Trojan Vundo with VundoFix.exe from

 Trojan and Malware "Puper" Description and Removal

 VSToolbar (VSAdd-in.dll) - Description and Removal

 Spybot - Spyware Blocker, Detection and Removal

 Setting Up and Using Crossover Cable Network

 Home Network Gateway - DSL Modem/Wireless Router

 Windows Task Manager - The System Performance Tool

 "tasklist" Command Line Tool to List Process Information

 "msconfig" - System Configuration Tool

 Configuring and Managing System Services

 Windows Registry Key and Value Management Tools

 Startup Programs Removal for Better System Performance

 Winsock - Windows Sockets API

 Java on Windows

 Glossary of Terms

 Outdated Tutorials


 Full Version in PDF/ePUB