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  • "Xw0rm4rch1v3" started this thread

Date of registration:
May 13th 2011

Operating System:
windows xp

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1

Friday, May 13th 2011, 10:30am

PCMAV Express

hi all ...
my computer is infected with a virus that after I send it to virus total, apparently a variant Ramnit ... then I use some anti-virus to clean my computer from viruses ramnit ..

and it turns out I found something interesting in one of the local antivirus forum Indonesia ... Initially I thought this would not been able ...
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to the explanation can be found at the following URL:
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For Sample of Ramnit, you can download from here:
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I hope this can be a bit of choice to clean the virus Ramnit
_______________________
links removed

This post has been edited 3 times, last edit by "marfabilis" (May 13th 2011, 3:44pm)


FFreestyleRR

Community member

Date of registration:
Apr 16th 2008

Version:
Avira Free Antivirus

Operating System:
Windows 7 Ultimate SP1 x64

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2

Friday, May 13th 2011, 11:11am

I'm afraid I have very bad news for you.

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. You will need to run an OS repair install to get OS integrity restored.


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 smo"rga*sbord 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:

Quoted

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?.

Quoted

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).



This is an absolutely massive amount of work to be done there but this is the only safest way.



Regards,
Georgi

  • "Xw0rm4rch1v3" started this thread

Date of registration:
May 13th 2011

Operating System:
windows xp

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3

Friday, May 13th 2011, 11:49am

have you tried this program?
have you tried use this program to cure ramnit?
look you just analyze from other sources without verify it, otherwise i just share this information so it can be alternative to clean ramnit and i've tried it successfully...

Regards
Xw0rm4rch1v3

marfabilis

Moderator

Date of registration:
May 14th 2010

Version:
Avira Free Antivirus
Avira Antivirus Suite
Avira Internet Security Suite
Avira Internet Security

Operating System:
System of a Down

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4

Friday, May 13th 2011, 11:53am

Hi Xw0rm4rch1v3,

Please don't post such links here. This is the Avira Support Forum and the most recommended is to use Avira Rescue CD in this type of infection.
Also, Georgi's explanation would be more appropriate if the Avira rescue CD would not work as expected.

This thread will be closed now.

Marco
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