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Possible virus or vbootkit v2.0


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2 replies to this topic

#1 trakian

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Posted 02 March 2014 - 10:17 AM

Hello

I am totally stuck with this bootkit, I tried every way to clean on my mobo  but combofix crashed,i tried zero sector format low level same process continue.

I used vista home basic desktop computer,when i connect internet browser redirecting with http%3A%2F%2F and bios cant read with tag x select ide channel 1 master or slave none .Norton rescue found this  w32.ramnit!inf ve w32.ramnit!htm and delete all.Gmer detected rootkit but cant remove.

 

virus files for w32.ramnit!inf

C:\users\username\appdata\local\microsoft\windows mail\stationary\green bubbles.html

C:\users\username\appdata\local\microsoft\windows mail\stationary\hand prints.html

C:\users\username\appdata\local\microsoft\windows mail\stationary\orange circles.html

C:\users\username\appdata\local\microsoft\windows mail\stationary\peacok.html

C:\users\username\appdata\local\microsoft\windows mail\stationary\roses.html

C:\users\username\appdata\local\microsoft\windows mail\stationary\stars.html

C:\users\username\appdata\local\microsoft\windows mail\stationary\shades of blue

C:\users\username\appdata\local\microsoft\windows mail\stationary\soft blue

virus files for  w32.ramnit!htm

C:\Users\username\AppData\local\virtual store\program files\common files\nero\shared\nl3\patentactivationfax.html

I tried online scanners,nobody found . Any ideas please?Bios rootkit or bootkit?



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#2 fireman4it

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Posted 02 March 2014 - 04:45 PM

I'm afraid I have very bad news.

Win32/Ramnit.A is a file infector with IRCBot functionality which infects .exe, and .HTML/HTM 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. The infected .HTML or .HTM files may be detected as Virus:VBS/Ramnit.A. Win32/Ramnit.A!dll is a related file infector often seen with this infection. It too has IRCBot functionality which infects .exe, .dll  and .HTML/HTM files and opens a back door that compromises your computer. This component is injected into the default web browser by Worm:Win32/Ramnit.A which is dropped by a Ramnit infected executable file.

-- 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? The malware injects code in legitimate files similar to the Virut virus and in many cases the infected files (which could number in the thousands) cannot be disinfected properly by your anti-virus. When disinfection is attempted, the files often become corrupted and the system may become unstable or irreparable. The longer Ramnit.A remains on a computer, the more files it infects and corrupts so the degree of infection can vary.

Ramnit is commonly spread via a flash drive (usb, pen, thumb, jump) infection where it copies Worm:Win32/Ramnit.A with a random file name. The infection 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.

In my opinion, Ramnit.A is not effectively disinfectable, so 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. 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 wipe the drive clean, reformat and reinstall the OS. 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 fireman4it

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Posted 06 March 2014 - 07:07 PM

It appears that this issue is resolved, therefore I am closing the topic. If that is not the case and you need or wish to continue with this topic, please send me or any Moderator a Personal Message (PM) that you would like this topic re-opened.

" Extinguishing Malware from the world"

The Virus, Trojan, Spyware, and Malware Removal forum is very busy. If I'm helping you and I've not posted back within 24 hrs., send a PM with your topic link. Thank you.

ALL OTHER HELP REQUESTS VIA THE PM SYSTEM WILL BE IGNORED. The Forums are there for a reason!
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If I have helped you, consider making a donation to help me continue the fight against Malware! Just click btn_donate_LG.gif





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