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System Volume Info & Malware-gen


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#1 Dianopan

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Posted 12 April 2009 - 09:50 AM

Hi

I was on the Internet on 1 April 09. A few days later, got worried (about Conficker) and scanned the whole system (took hours). Avast version 4.8 Home Edition (Build Feb2009 (4.8.1335) ) found 2 files with BV:Malware-gen virus. I opted to "move to chest". The files are:

FILE 1:
Name: A0000563.inf
Original Location: D:\System Volume Information\_restore{42F1E919-F46C-4EB4-9E14-....}\RP14
Last changed: 24-Dec-08


FILE 2:
Name: A0032511.inf
Original Location: D:\System Volume Information\_restore{E91CDAED-E313-....}\RP165
Last Changed: 14-Sep-08


Since then, I am having problem saving my video files captured through Avid Liquid 7.2 .

I have tried resetting the media management in Avid. I have scanned with Windows MSRT (latest download from Microsoft website) -- no malicious software detected. I still can't save my video captures.

Do I need to copy the above 2 files back to their original location?
Are the files really virus? They are still in the chest.

I think I have also deleted all restore points except the last one.

Appreciate some help.

Dianopan

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#2 garmanma

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Posted 12 April 2009 - 09:02 PM

Name: A0000563.inf
Original Location: D:\System Volume Information\_restore{42F1E919-F46C-4EB4-9E14-....}\RP14
Last changed: 24-Dec-08


FILE 2:
Name: A0032511.inf
Original Location: D:\System Volume Information\_restore{E91CDAED-E313-....}\RP165
Last Changed: 14-Sep-08


Those are restore points
Mark
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#3 Dianopan

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Posted 13 April 2009 - 07:10 AM

Thank you, Garmanma

What a relief ! My PC was not infected !!

How do I restore these files ? Will that help resolve my problem with writing video captures into the hard drive?

Dianopan

#4 garmanma

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Posted 13 April 2009 - 03:03 PM

I'm not so sure that these two are causing your problem
Let's see if we can get another scan tool to show something

---------------------------

The process of cleaning your computer may require you to temporarily disable some security programs. If you are using SpyBot Search and Destroy, please refer to Note 2 at the bottom of this page.

Please download Malwarebytes Anti-Malware and save it to your desktop.
alternate download link 1
alternate download link 2
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
  • When the installation begins, follow the prompts and do not make any changes to default settings.
  • When installation has finished, make sure you leave both of these checked:
    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
MBAM will automatically start and you will be asked to update the program before performing a scan.
  • If an update is found, the program will automatically update itself.
  • Press the OK button to close that box and continue.
  • If you encounter any problems while downloading the updates, manually download them from here and just double-click on mbam-rules.exe to install.
On the Scanner tab:
  • Make sure the "Perform Quick Scan" option is selected.
  • Then click on the Scan button.
  • If asked to select the drives to scan, leave all the drives selected and click on the Start Scan button.
  • The scan will begin and "Scan in progress" will show at the top. It may take some time to complete so please be patient.
  • When the scan is finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".
  • Click OK to close the message box and continue with the removal process.
Back at the main Scanner screen:
  • Click on the Show Results button to see a list of any malware that was found.
  • Make sure that everything is checked, and click Remove Selected.
  • When removal is completed, a log report will open in Notepad.
  • The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.
  • Copy and paste the contents of that report in your next reply and exit MBAM.
Note:
-- If MBAM encounters a file that is difficult to remove, you may be asked to reboot your computer so it can proceed with the disinfection process. Regardless if prompted to restart the computer or not, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.

Note 2:
-- MBAM may make changes to your registry as part of its disinfection routine. If you're using other security programs that detect registry changes (like Spybot's Teatimer), they may interfere with the fix or alert you after scanning with MBAM. Please disable such programs until disinfection is complete or permit them to allow the changes. To disable these programs, please view this topic: How To Temporarily Disable Your Anti-virus, Firewall And Anti-malware Programs
Mark
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#5 Dianopan

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Posted 16 April 2009 - 10:34 AM

Hi Garmanma

Below is the result of the scan: (The program did not ask for which drives to scan. The result showed no malicious items were detected.)

Malwarebytes' Anti-Malware 1.36
Database version: 1989
Windows 5.1.2600 Service Pack 3

16-Apr-09 10:54:09 PM
mbam-log-2009-04-16 (22-54-09).txt

Scan type: Quick Scan
Objects scanned: 72415
Time elapsed: 2 minute(s), 55 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)


It took 18 min to scan D: drive and the result was the same as above. (Right clicked on D: drive and scanned)
I have used Microsoft's Malicious Software Removal Tool.
I have done a full scan with Avast. Took hours. But came up with only the System Volume Info file. No Virus.


Dianopan

#6 quietman7

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Posted 16 April 2009 - 11:35 AM

Avast version 4.8 Home Edition (Build Feb2009 (4.8.1335) ) found 2 files with BV:Malware-gen virus. I opted to "move to chest

The detected _restore{GUID}\RP***\A00*****.xxx file(s) identified by your scan are in the System Volume Information Folder (SVI) which is a part of System Restore. The *** after RP represents a sequential number automatically assigned by the operating system. The ***** after A00 represents a sequential number where the original file was backed up and renamed except for its extension. To learn more about this, refer to:System Restore is the feature that protects your computer by creating backups (snapshots saved as restore points) of vital system configurations and files. These restore points can be used to "roll back" your computer to a clean working state in the event of a problem. This makes it possible to undo harmful changes to your system configurations including registry modifications made by software or malware by reverting the operating systems configuration to an earlier date. The SVI folder is protected by permissions that only allow the system to have access and is hidden by default on the root of every drive, partition or volume including most external drives, and some USB flash drives.

System Restore is enabled by default and will back up the good as well as malicious files, so when malware is present on the system it gets included in restore points as an A00***** file. When you scan your system with anti-virus or anti-malware tools, you may receive an alert that a malicious file was detected in the SVI folder (System Restore points) and moved into quarantine. When a security program quarantines a file, that file is essentially disabled and prevented from causing any harm to your system. The quarantined file is safely held there and no longer a threat. Thereafter, you can delete it at any time.

Also see How antivirus software and System Restore work together.

If your anti-virus or anti-malware tool cannot move the files to quarantine, they sometimes can reinfect your system if you accidentally use an old restore point. In order to avoid reinfection and remove these file(s) if your security tools cannot remove them, the easiest thing to do is create a new Restore Point and purge the old with disk cleanup. If your anti-virus or anti-malware tool was able to move the file(s), I still recommend creating a new restore point and using disk cleanup as you already have done.
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#7 Dianopan

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Posted 17 April 2009 - 09:19 AM

Hi Quietman7

Thank you for your info and the links. Useful reading.

I will clean up the drives and create RP again. Hope this would solve my problem with Avid capture.

Dianopan

#8 quietman7

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Posted 17 April 2009 - 09:33 AM

You're welcome.


Tips to protect yourself against malware and reduce the potential for re-infection:Avoid gaming sites, pirated software, cracking tools, keygens, and peer-to-peer (P2P) file sharing programs. They are a security risk which can make your computer susceptible to a smörgåsbord of malware infections, remote attacks, exposure of personal information, and identity theft. Many malicious worms and Trojans spread across P2P file sharing networks, gaming and underground sites. Users visiting such pages may see innocuous-looking banner ads containing code which can trigger pop-up ads and malicious Flash ads that install viruses, Trojans and spyware. Ads are a target for hackers because they offer a stealthy way to distribute malware to a wide range of Internet users. The best way to reduce the risk of infection is to avoid these types of web sites and not use any P2P applications. Read P2P Software User Advisories and Risks of File-Sharing Technology.

Keeping Autorun enabled on USB (pen, thumb, jump) 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. To learn more about this risk, please read:Many security experts recommend disabling this feature as a method of prevention. Microsoft recommends doing the same.

...Disabling Autorun functionality can help protect customers from attack vectors that involve the execution of arbitrary code by Autorun when inserting a CD-ROM device, USB device, network shares, or other media containing a file system with an Autorun.inf file...

Microsoft Security Advisory (967940): Update for Windows Autorun
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