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W32.VIRUT removed w/ CUREIT / BLUESCREEN LOOP ERROR 7E/ NO NORMALorSAFEMODE BOOT


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#1 bgoldman

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Posted 20 October 2010 - 05:20 PM

I (think) have removed w32.virut.56 w/ Dr. Webb CureIt....followed steps from YouTube post. Installed Comodo Internet Security (CIS) 30 Day Trial in safemode. Restarted in Normal Mode and everything booted up. 1- 2 minutes in normal mode CIS was flagging items and then locked up. CIS said that there was a problem with the install. I tried to reinstall, but CIS said I had to uninstall it first. I shutdown. Restarted to same results except this time it crashed to BSOD error code 0x0....7e mentioning to disable or uninstall recently installed AVG program and to run chkdsk /f and the file "zjnegxulrgec5.sys can't be located". I restarting and uninstalled CIS, but it repeated the BSOD about 1-2 minutes into Normal Mode after login. Next I tried to run chkdsk, but it said that the volume was not open to access. I tried the same thing from safemode. Wouldn't let me remove CIS from safemode and same thing on the chkdsk. I ran chkdsk from the recovery console....still the same BSOD. I then downloaded a program call Perfect Uninstaller to remove CIS from Safemode. It removed CIS registry, but entries and files, but on reboot it made it to Windows Splash screen flashed a BSOD and rebooted...the same thing resulted in trying to reboot to Safemode. I then tried a Windows Repair Install, but that didn't work.

So now I'm asking for your help. I'm using the HBCD now and following the pre-directions. I tried to get the DDS log..but the black screen flashed and never posted a log. I also tried the gmer.exe scan and it opened with dialog box saying "x:\i386\system32\config\system: the system cannot find the file specified." I then hit close. I was able to change the settings as directed and start the scan, it scans for a bit stops with the same dialog box and then terminates after scanning a little bit. That's as far as I can go. Please help. I don't want reinstall windows!!!

Edited by bgoldman, 20 October 2010 - 05:28 PM.


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#2 quietman7

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Posted 20 October 2010 - 05:31 PM

I'm afraid I have very bad news.

Virut is a polymorphic file infector with IRCBot functionality which infects .exe, .scr files, and opens a back door that compromises your computer. Using this backdoor, a remote attacker can access and instruct the infected computer to download and execute more malicious files.

-- Note: As with most malware infections, the threat name may be different depending on the anti-virus or anti-malware program which detected it. Each security vendor uses their own naming conventions to identify various types of malware.
With this particular infection, the safest solution and only sure way to remove it effectively is to reformat and reinstall the OS.

Why? 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 and Win32/Virut.17408 variants are an even more complex file infectors 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 damage 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/VirutVirut is commonly spread via a flash drive (usb, pen, thumb, jump) infection using RUNDLL32.EXE and other malicious files. It is often contracted 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.

Since 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 (which could number in the thousands) cannot be deleted and anti-malware scanners cannot disinfect them properly. Security vendors that claim to be able to remove file infectors cannot guarantee that all traces of it will be removed as they may not find all the remnants. If something goes awry during the malware removal process there is always a risk the computer may become unstable or unbootable and you could loose access to all your data.

Further, your machine has likely been compromised by the backdoor Trojan and there is no way to be sure the computer can ever be trusted again. It is dangerous and incorrect to assume the computer is secure even if your anti-virus reports that the malware appears to have been removed.

Many experts in the security community believe that once infected with this type of malware, the best course of action is to 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:

Whenever a system has been compromised by a backdoor payload, it is impossible to know if or how much the backdoor has been used to affect your system...There are only a few ways to return a compromised system to a confident security configuration. These include:
• Reimaging the system
• Restoring the entire system using a full system backup from before the backdoor infection
• Reformatting and reinstalling the system

Backdoors and What They Mean to You

This is what Jesper M. Johansson at Microsoft TechNet has to say: Help: I Got Hacked. Now What Do I Do?.

The only way to clean a compromised system is to flatten and rebuild. That’s right. If you have a system that has been completely compromised, the only thing you can do is to flatten the system (reformat the system disk) and rebuild it from scratch (reinstall Windows and your applications).


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#3 bgoldman

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Posted 20 October 2010 - 05:44 PM

Is there a way I can detect if I still have the W32.VIRUT.56 virus, because I really think I have it removed...its just that when I ran CureIt it found /cured it on the first scan, but not on the second or third scans. I think the main problem is that the Comodo Internet Security program has slammed the door shut.....

#4 quietman7

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Posted 20 October 2010 - 06:05 PM

...I really think I have it removed

I'm sorry but IMO that is wishful thinking. I do not know of any security vendor who will guarantee complete removal of virut. Even vendors like Kaspersky say there is no quarantee that some files will not get corrupted during the disinfection process. In my experience, users may find their system performing better for a short time only to have it become progressively worst again as virut will continue to reinfect your files. Some folks will try every tool or rescue disk they can find which usually leaves the computer in an unbootable state as a result of futile attempts to repair critical system files and drivers. In the end most folks end up reformatting out of frustration after spending hours attempting to repair and remove infected files.
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