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 Windows Security Book

 Windows 8: System Security Review

 Windows 8: System Security Protection

 Windows 8 System Recovery

 Windows 8 Defender for Real-Time Protection

 Windows 7: System Security Review

 Windows 7: System Security Protection

 Windows 7 System Recovery

 Windows 7 Forefront Client Security

 Norton Power Eraser - Anti-Virus Scan Tool

 McAfee Virus and Malware Protection Tools

 Spybot - Spyware Blocker, Detection and Removal

 Keeping Firefox Secure

 Keeping IE (Internet Explorer) Secure

 Malware (Adware, Spyware, Trojan, Worm, and Virus)

 HijackThis - Browser Hijacker Diagnosis Tool

 IE Add-on Program Listing and Removal

 "Conduit Search" - Malware Detection and Removal

 "Tube Dimmer", "Scorpion Saver" or "Adpeak" Malware

 Malware Manual Removal Experience

Vundo (VirtuMonde/VirtuMundo) - vtsts.dll Removal

 What Is Trojan Vundo?

 Partial Removal of Trojan Vundo

 Detecting Trojan Vundo with McAfee VirusScan

 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

 PWS (Password Stealer) Trojan Infection Removal

 MS08-001 Vulnerability on Windows Systems

 Antivirus System PRO


 Full Version in PDF/ePUB