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About Brian Benosky
Expertise
I will help you in eradicating malware and all forms of virus/trojans/adware. I can answer all PC-related hardware issues. I can also troubleshoot Windows OS errors (including Vista) and other software problems. HijackThis logs are a MUST for virus related help. If you do not know how to do this, I have posted easy-to-follow instructions on the Ask a Question page. Every computer infection is different, so I will give you personal instructions on how to remove the malware, not a 'pat' answer. You can be assured of a prompt, polite, and knowledgeable response in all regards.

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I have over 25 years experience in using, building, and repairing computers. I have helped over a thousand people here on AllExperts, with consistent Top Feedback Scores. Please look at my answers here: http://en.allexperts.com/q/Computer-Security-Viruses-1737/indexExp_84308.htm I am also a Top Contributer of General Computing answers in Yahoo! Questions.

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College Educated Self-taught Computer Skills

 
   

You are here:  Experts > Computing/Technology > Internet/Network Security > Computer Security & Viruses > how to get rid of a Backdoor virus

Computer Security & Viruses - how to get rid of a Backdoor virus


Expert: Brian Benosky - 6/22/2009

Question
Hi Brian:
I live in Canada, so I don't know if this "allexperts" page works when sending questions from here.
My question is simple: a virus by the name of "Backdoor.Win32Xeol.g" has attached itself to two files in my XP operating system.  The first file is C:\program files\BVE4\train\LT1995|OS_ATS\dll and the second file is really long, but starts off as C:\System Volume Info----and goes on and on, but ends .dll.
Thank you for your help - much appreciated.

Answer
Hi JW

The C:\System Volume Info file is a System Restore file.  Your safest bet is to turn off System Restore, then once the computer is clean, turn it back on again.  Instructions for this can be found here:
http://support.microsoft.com/kb/310405
After turning it off, follow my instructions below to remove the trojan:

Boot into safe mode.  After pressing the power button, continuously tap the F8 key until a black screen with a menu appears.  Choose to boot Vista into Safe Mode With Networking, then log on as usual.  Then open up a browser and continue with the instructions:

Please download Malwarebytes' Anti-Malware to your desktop from here:

http://www.besttechie.net/tools/mbam-setup.exe

Double-click mbam-setup.exe and follow the prompts to install the program.
* At the end, be sure a checkmark is placed next to
o Update Malwarebytes' Anti-Malware
* then click Finish.
* If an update is found, it will download and install the latest version.
*Run a Full Scan.
* When the scan is complete, click OK, then Show Results to view the results.
* Be sure that everything is checked, and click Remove Selected.
* When completed, a log will open in Notepad.  Save that log and reboot normally.

Download and install HijackThis:

http://www.trendsecure.com/portal/en-US/_download/HJTInstall.exe

Make sure you close EVERY open window and ALL browser windows. The only thing that should be open is the HijackThis program.
Double-click on the file you just downloaded.
Click on the "Install" button.
Upon install, HijackThis should open for you.
Should it not open, go to C:\Program Files\Trend Micro\HijackThis and double click on HijackThis.exe
Choose 'Do a system scan and save a log file'.
Copy the text file which opens in Notepad and paste it in your follow-up, along with the Malwarebytes log.
* Do not fix any entries in HijackThis, as they may be harmless.

Brian

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