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Virut PE Win32 56


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#1 digg5

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Posted 01 October 2009 - 12:12 PM

I have been infected with Virut 32 and according to Dr. Web it is Virut PE Win32 56. I've tried everything from Spybot, MalwareBytes, Dr. Web A/V to Combofix and nothing will contain it. Am I totally cooked? It seemed to have infeced all .exe and .scr files on my non system partitions as well as my primary system partition. According to Dr. Web, I have successfully removed it from the non system partitions. Am I totally cooked? Can I possibly succeed with cleaning my non system partitions with Dr. Web and then formatting my primary partition and installing a clean XP image before I reboot?

Intel P4 2.4Ghz
Windows XP SP3
All windows updates installed.
Running Avast Home A/V.

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#2 quietman7

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Posted 01 October 2009 - 12:16 PM

I'm afraid I have very bad news.

Your system is infected with a nasty variant of Virut, a polymorphic file infector with IRCBot functionality which infects .exe, .scr files, downloads more malicious files to your system, and opens a back door that compromises your computer. According to this Norman White Paper Assessment of W32/Virut, some variants can infect the HOSTS file and block access to security related web sites. Other variants of virut can even penetrate and infect .exe files within compressed files (.zip, .cab, rar). The Virux variant is an even more complex file infector which can embed an iframe into the body of web-related files and infect script files (.php, .asp, .htm, .html, .xml ). When Virut creates infected files, it also creates non-functional files that are corrupted beyond repair and in some instances can disable Windows File Protection. In many cases the infected files cannot be disinfected properly by your anti-virus. When disinfection is attempted, the files become corrupted and the system may become irreparable. The longer virut remains on a computer, the more critical system files will become infected and corrupt so the degree of infection can vary.

The virus disables Windows File Protection by injecting code into the "winlogon.exe" process that patches system code in memory.

CA Virus detail of W32/Virut

The virus has a number of bugs in its code, and as a result it may misinfect a proportion of executable files....some W32/Virut.h infections are corrupted beyond repair.

McAfee Risk Assessment and Overview of W32/Virut

There are bugs in the viral code. When the virus produces infected files, it also creates non-functional files that also contain the virus...Due to the damaged caused to files by virut it's possible to find repaired but corrupted files. They became corrupted by the incorrect writing of the viral code during the process of infection. undetected, corrupted files (possibly still containing part of the viral code) can also be found. this is caused by incorrectly written and non-function viral code present in these files.

AVG Overview of W32/VirutThis kind of infection is often contracted and spread by visiting remote, crack and keygen sites. These type of sites are infested with a smörgåsbord of malware and a major source of system infection.

...warez and crack web pages are being used by cybercriminals as download sites for malware related to VIRUT and VIRUX. Searches for serial numbers, cracks, and even antivirus products like Trend Micro yield malcodes that come in the form of executables or self-extracting files...quick links in these sites also lead to malicious files. Ads and banners are also infection vectors...

Keygen and Crack Sites Distribute VIRUX and FakeAV

However, the CA Security Advisor Research Blog have found MySpace user pages carrying the malicious Virut URL. Either way you can end up with a computer system so badly damaged that recovery is not possible and it cannot be repaired. When that happens there is nothing you can do besides reformatting and reinstalling the OS.

If your computer was used for online banking, has credit card information or other sensitive data on it, you should disconnect from the Internet until your system is cleaned. All passwords should be changed immediately to include those used for banking, email, eBay, paypal and online forums. You should consider them to be compromised. You should change each password using a clean computer and not the infected one. If not, an attacker may get the new passwords and transaction information. If using a router, you need to reset it with a strong logon/password so the malware cannot gain control before connect again. Banking and credit card institutions should be notified of the possible security breach. Because your computer was compromised please read:Virut is not effectively disinfectable. Your best option is to perform a full reformat as there is no guarantee this infection can be completely removed. In most instances it may have caused so much damage to your system files that it cannot be completely cleaned or repaired. In many cases the infected files cannot be deleted and anti-malware scanners cannot disinfect them properly. Many experts in the security community believe that once infected with this type of malware, the best course of action is to wipe the drive clean, reformat and reinstall the OS. Reinstalling Windows without first wiping the entire hard drive with a repartition and/or format will not remove the infection. The reinstall will only overwrite the Windows files. Any malware on the system will still be there afterwards. Please read:
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#3 digg5

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Posted 01 October 2009 - 03:07 PM

Thank you kindly for your advice. I am and IT professional and have been working with malware and viruses for many years. This by far the most difficult and nasty I've run into to day. It's my own fault as I got it trying to run a key gen and I knew the risk involved and am now paying dearly for it. Because I recognized the infection immediately and disconnected my infected machine from the internet, I am not terribly concerned with identity theft. I had not logged into any sites or fake log in screens since the infection.

I am hopeful that I will have luck with wiping and reimaging my primary system partition. First I will run the Dr. Web cleaner on my non system partitions and reimage XP before rebooting which should eliminate any chance of reinfection.

Do you know anyone that has had any luck with this tool before I do or am I wasting more time?

The Norman Virut Cleaner can be downloaded for free from http://www.norman.com/Virus/Virus_removal_tools/. Should infections re-appear after cleaning, then you can run the Norman Virut Cleaner in forensic investigator mode
(by executing “Norman_VirutCM_Cleaner.exe /nfi”), which will harvest all suspicious
files found on the system into a package that can easily be sent to your local support
office for further analysis.

If not would you trust the non .exe/scr personal data files that had been cleaned and are still showing as clean by Dr. Web?

#4 quietman7

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Posted 01 October 2009 - 05:24 PM

I am familar with all the tools which claim to be able to disinfect virut.

If you insist on trying to fix this infection instead of following our advice to reformat and reinstall your operating system, there are various rescue disks available from major anti-virus vendors which you can try. From what I have read, seen, and tried its virtually impossible to completely remove and just a waste of time. You can try booting from every rescue disk you can find but they will likely leave you computer in an unbootable state in as a result of futile attempts to repair system files and drivers. Even the vendors like Kaspersky say there is no quarantee that some files will not get corrupted during the disinfection process. In the end most folks end up reformatting out of frustration after spending hours attempting to repair and remove infected files. IMO the safest and easiest thing to do is just reformat and reinstall Windows.

Bleeping Computer DOES NOT assume any responsibility for your attempt to repair this infection using any of the following tools. You do this at your own risk and against our advice.

These are links to Anti-virus vendors that offer free LiveCD or Rescue CD utilities that are used to boot from for repair of unbootable and damaged systems, rescue data, scan the system for virus infections. Burn it as an image to a disk to get a bootable CD. All (except Avira) are in the ISO Image file format. Avira uses an EXE that has built-in CD burning capability.If you are not sure how to burn an image, please read How to write a CD/DVD image or ISO. If you need a FREE utility to burn the ISO image, download and use ImgBurn.

Note: In order to use a rescue disk, the boot order must be set to start from the CD-ROM drive. If the CD is not first in the boot order, the computer will attempt to start normally by booting from the hard drive. The boot order is a setting found in the computer’s BIOS which runs when it is first powered on. This setting controls the order that the BIOS uses to look for a boot device from which to load the operating system. The default will normally be A:, C:, CD-ROM. Different computers have different ways to enter the BIOS. If you're not sure how to do this, refer to:
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#5 digg5

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Posted 02 October 2009 - 07:41 AM

The Norman Malware Removal Tool actually got rid of it. Dr. Web got rid of most of it I hadn't realized that before I ran it that somehow the virus had enabled system restore on all of my partitions. So I disabled it and ran Norman in safe mode found some hidden files in the uninstall directory for Windows update and system32 and a bunch of files on one of my non system partitions. I've been running online for about 12 hours now symptom free and my winlogon.exe is no longer connecting to an IP address in Russia. Thanks for your post, I had never tried Norman and I would still be rebuilding right now if you had not replied with that post.

Devin

#6 quietman7

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Posted 02 October 2009 - 07:50 AM

I'm glad to hear you were successful.

Despite that, I'm still skeptical of using these tools especially for novice users as in most cases folks are not so fortunate as yourself. I recommend you closely monitor the system for the next several days as a precaution.
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