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Infected By Autorun.vbs Virus! Need Help


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13 replies to this topic

#1 vasili

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Posted 13 May 2007 - 09:11 PM

My laptop has been infected by the autorun.vbs virus

I can't open my C:/ and also D:/

Everytime i tried it said cannot find autorun.vbs

The words on "Open" and "Explore" when i right-click on my C:/ and D:/ became un-readable words

Please i really need help here because my AVAST antivirus cant remove it.

Thanks

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#2 TMacK

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Posted 13 May 2007 - 10:07 PM

Welcome to Bleeping Computer vasili,

Sounds like you may be infected with a Trojan.
Please read and follow the instructions in this topic; Preparation Guide for use before posting a HijackThis Log .
When you have done that, post your log in the HijackThis Logs and Analysis Forum, Not Here.

After posting a log you should not make any changes to your computer (install/uninstall programs, delete files, edit the registry, etc.) unless advised by a HJT Team member.
Chaos reigns within.
Reflect, repent, and reboot.
Order shall return.

aaaaaaaa a~Suzie Wagner

#3 fozzie

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Posted 14 May 2007 - 03:31 AM

As first resort you might want to try Flash_Disinfector.exe. If you do that please connect disconnect from the internet and put any Flashdrives you have in the computer

#4 syunichi

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Posted 14 May 2007 - 07:25 AM

Hmm..sounds familiar. Try this method...

Under tools>folder options>view> show hidden file and folders (uncheck this box) hide extension known files (uncheck this one too) hide protected system operating files (uncheck this too)

go to my computer,right click on C:/ or D:/ and use EXPLORE rather than OPEN. Find some file named "autorun.inf" and "msvcr71.dll". Delete it and complete doing it with all partitions that is D: and C:.

Double clicking the the partition as it was will result in triggering wscript.exe and the autorun.vbs file.

Reboot when autorun.inf is deleted. Hope this works for you. :thumbsup:

Edited by syunichi, 14 May 2007 - 07:27 AM.

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#5 vasili

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Posted 15 May 2007 - 02:31 AM

Hi syunichi

The word 'EXPLORE' when i right-click on both C:/ and D:/ is un-readable.

If i delete those files which you told me, would it affects my system? will it crashed?

Am I taking a risk here?

#6 fozzie

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Posted 15 May 2007 - 04:35 AM

Simplest would be to run the tool I proposed since it will do that automaticly.
Vasili to be absolutely sure we have the right infection please locate a file called ravmon.exe which is the source of the infection. There also will be an entry in the registry which will be removed by the tool I proposed.

#7 vasili

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Posted 16 May 2007 - 10:13 AM

Fozzie

I'm sorry if i don't understand you.

Why do I need to plug in any flash drive?

It affects my hard drive C:/ and D:/

#8 TMacK

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Posted 16 May 2007 - 11:14 AM

As first resort you might want to try Flash_Disinfector.exe. If you do that please connect disconnect from the internet and put any Flashdrives you have in the computer


I believe Fozzie meant to plug in any Flash Drives that you have used with this computer.
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Order shall return.

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#9 vasili

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Posted 17 May 2007 - 06:29 AM

To Tmack

Oh ya, my thumb-drive has been infected as well.

But how am I to remove the virus which has infected my hard-drive?

#10 fozzie

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Posted 17 May 2007 - 06:54 AM

Since you have posted a HIJackThis log this topic should be closed.

#11 quietman7

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Posted 17 May 2007 - 08:59 AM

vasili's log is posted here: http://www.bleepingcomputer.com/forums/t/92358/infected-with-autorunvbs-virus/

After posting a log you should NOT make further changes to your computer (install/uninstall programs, use special fix tools, delete files, edit the registry, etc.) unless advised by a HJT Team member. Doing so can result in system changes which may not show it the log you already posted. Further, any modifications you make may cause confusion for the member assisting you and could complicate the malware removal process which would extend the time it takes to clean your computer.
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#12 vasili

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Posted 17 May 2007 - 12:31 PM

To Fozzie

Sorry for misunderstanding you.

I followed your advice and use the FLASH DISINFECTOR

The virus was removed.

Thanks alot! Really appreciated your advice and help :thumbsup:

#13 iGy

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Posted 23 November 2007 - 06:59 AM

Thanks to this post and particulary to fozzie, I was able to help a friend who has the same problem. Big thanks. :thumbsup:
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#14 quietman7

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Posted 23 November 2007 - 07:13 AM

Flash drive infections usually involve malware that loads an autorun.inf file into the root folder of all drives (internal, external, removable). When the removable media is inserted, autorun looks for autorun.inf and automatically executes a malicious autorun.bat file which calls wscript.exe to run autorun.vbs on your computer. When a flash drive becomes infected, the Trojan will infect a system when the removable media is inserted if autorun has not been disabled.

"Autorun" is the feature built into Windows that automatically runs a program specified by an "autorun.inf" file whenever a CD-ROM, DVD or USB drive is plugged into a Windows-based computer. Autorun is intended as a convenience to automatically start an installer when removable media is inserted into the computer.

Keeping Autorun enabled on USB and other removable drives has become a significant security risk due to the increasing number of malware variants that can infect them and transfer the infection to your computer. Read Danger USB! Worm targets removable memory sticks.

I recommend disabling the Autorun feature on USB drives as a method of prevention.

The easiest way to disable Autorun on a specific drive is to download and use Tweak UI PowerToy.
  • After installation, launch Tweak UI, double-click on My Computer in the tree menu on the left, then click on AutoPlay > Drives. This will allow you to change the system settings for AutoPlay/autorun.
  • Uncheck the drives you want to disable AutoPlay on and click on Apply.
  • Next, click on the Types in the left tree. This allows you to control whether Autoplay is enabled for CD and DVD drives and removable drives. You may need to restart Tweak UI if it closes after step 2.
  • Uncheck the box to disable Autoplay for a particular type of drive.
  • Click Apply.
See "Disable Autorun/AutoPlay" for instructions with screenshots.
When Autorun is disabled, double-clicking a drive which has autorun.inf in its root directory may still activate Autorun so be careful.

Always scan USB Flash Drives after they have been used in other computer systems, even your own. An easy way to do this is to download "ClamWin Portable", install it on your USB Flash Drive, update its definition files and perform a scan.

Another prevention measure you can use is to download Symantec's NoScript utility. Scroll down to the section "How to disable (or re-enable) the Windows Scripting Host" to find the link and follow the instructions. Noscript will disable the Windows Scripting Host and prevent VBScripts from running on your machine until you run the utility again.

Since the original OP posted a hijackthis log, I am closing this thread which we normally do when this is done to avoid confusing but was over looked at that time. If you have any questions start a new thread or send me a PM.
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