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w32 virut.gen2


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#1 lmwtech

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Posted 27 May 2009 - 08:52 PM

Can some one give me tip on removal of this bugger? I have been swarmed in my shop for the last couple of months with virut.gen,virut.gen2, the uac rootkit thing, vundo's, and I seem to come accross alot of stuff that doesn't show up at ALL when I google it. Then a week or two later I can start finding things on the net about them. Surely I'm not the first to see some of these new things popping up. Things are damn hard to remove if at all. i usually go thru the process of sdfix, combofix,smitfraudfix, if I can access the drive thru a startup.
But anymore I see alot of pc's that won't even boot so I have to take them out and hook to another pc via a usb adapter and scan them with kaspersky downloaded thru sdfix standalone tool, and the other tools in regular mode sdfix, bitdefender online scan, avria,f-prot online scan, panda online scan,symantec online scan, norman malware scanner, malwarebytes antimalware, paid versions of spysweeper, and spyware doctor, windows defender, spybotsearch and destroy, ad-aware plus pro 30 day free trial, and I'm sure I forgot to mention something because I don't have my check list by my side right now. This, along with running specialty tools like vundofix or cwshredder or hijackthis, xpseconsole tool, rootkit revealer, stinger, etc. I also go in and delete the obvious bad things like all those 1.tmp and 2.tmp,b.tmp, a.tmp, and stuff like that.
This is all run from a vista ultimate pc's onto a drive hooked to the usb adapter, of course with show all files, and the other usuals, etc. Tell me i'm not the only one to have to go thru all this and a chkdsk /r before it will, 7 out of 10 times, boot where I can then run scans again in its own enviroment. To then hopefully give the customer his working again pc.
lmw

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#2 boopme

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Posted 27 May 2009 - 09:44 PM

Hello and welcome. Unfortunately I am the bearer of not so great 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. Virux 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, and .html). When Virut creates infected files, it also creates non-functional files that are corrupted beyond repair. 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 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 contracted and spread by visiting remote, crack and keygen sites. These type of sites are infested with a smörgåsbord of malware and an increasing source of system infection. However, the CA Security Advisor Research Blog says they 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.

...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

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:There is no guarantee this infection can be completely removed. In some instances it may have caused so much damage to your system that it cannot be completely cleaned or repaired. The malware may leave so many remnants behind that security tools cannot find them. 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 lmwtech

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Posted 28 May 2009 - 09:38 PM

And I agree and am fully aware of what you have posted. I actually just read some of those very quotes within the last week or so. I mean to tell you I'm swamped at work with all these virut things and it is all from households with teenagers in them. I often end up, format and reinstall, due to time and money constraints involved. I just always try to beat these guy's and format as an absolute LAST resort.
Some times it gets almost personal in trying to beat these guys!

#4 boopme

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Posted 28 May 2009 - 10:43 PM

I agree with you about formatting as a last resort. In some instances an infection may have caused so much damage to your system that it cannot be completely cleaned or repaired. Wiping your drive, reformatting, and performing a clean install of the OS or doing a factory restore removes everything and is the safest action but I cannot make that decision for you.

Reformatting a hard disk deletes all data. If you decide to reformat, you can back up all your important documents, data files and photos. The safest practice is not to backup any autorun.ini or .exe files because they may be infected. Some types of malware may disguise itself by adding and hiding its extension to the existing extension of files so be sure you take a close look at the full name. After reformatting, as a precaution, make sure you scan these files with your anti-virus prior to copying them back to your hard drive.


This is what I say if they want to insist on cleaning.
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. Keep in mind, 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 files 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.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook




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