VBS.Mondezimia

VBS.Mondezimia is a VBS, html, htm, and htt file infector that repeatedly infects all html files it can find on the infected computer. It can arrive on the system with an infected .html page. VBS.Mondezimia is capable of modifying Windows registry to run itself automatically when Windows is started. This virus may append VB script to the end of .html file that will increase its size to 35,581 bytes more.

Alias: Virus:VBS/Mondezimia.gen, Trojan-Dropper.VBS.Small.w, Trojan.Dropper, VBS/Small.W.3, Virus:VBS/Mondezimia.gen

Damage Level: Medium

Systems Affected: Windows 9x, 2000, XP, Windows Vista

Characteristics
Once VBS.Mondezimia is executed, it instantly drops a number of files under System folder of Windows. Then, it infects all HTML, HTM and HTT files on all accessible fixed drives of the compromised computer.

The virus will embed a malicious Visual Basic Script on target files causing the worm to propagate. This script can execute on most operating systems without the need to install additional program. Typically, an Internet browser loads VBS scripts automatically when a containing HTML file is opened.

The infected files are identifies as VBS.Mondezimia!html.

Added Registry Entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run\"ComService" = "%System%\config\NetLogon.vbs"
Associated Files and Folders:
%System%\config\NetLogon.vbs
%System%\dd.txt
%System%\DEMON - Downloader
%System%\TSP32E.DLL
%System%\TSP32V.DLL
%System%\Systemv.dll
%System%\se3gl9km.bat

How to Remove VBS.Mondezimia

1. Temporarily Disable System Restore (Windows Me/XP). [how to]
2. Open your antivirus application and update the virus definition file. This method ensures that your antivirus program can detect even newer variants of VBS.Mondezimia

3. Start Windows in Safe Mode with Networking.
- From a power-off state, turn on the computer and press F8 on your keyboard repeatedly.
- Your computer will display Windows Advanced Boot Options menu. Please select Safe Mode with Networking.
- The system will now boot Windows and loads only necessary drivers and files.

4. Open your antivirus program and run a full system scan. After the scan, delete all infected items. If unable, better place them in quarantine. Once the scan is complete, please proceed with the next step.

Online Virus Scanner:

Another way to remove VBS.Mondezimia without the need to install additional antivirus application is to perform a thorough scan with free online virus scanner that can be found on websites of legitimate anti-virus and security provider.

5. Go to Online Virus Scanner list and run a virus scan. This may require plug-ins, add-on or Activex object, please install if you want to proceed with scan.
6. After completing the necessary download, your system is now ready for online virus scanning.
7. Select an option in which you can thoroughly scan the computer to make sure that it will find and delete entirely all infections not detected on previous scan.
8. Remove or delete all detected items.
9. When scanning is finished you may now restart the computer in normal mode.