Sorry-
With this particular infection, the safest solution and only sure way to remove it effectively is to reformat and reinstall the OS. Here's why:
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.
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 malware and a major source of system infection.
In my opinion,
Ramnit.A is not effectively curable, 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.
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
Important Note:: 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 to include those used for banking, email, eBay, paypal and any online activities which require a username and password. 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. Banking and credit card institutions should be notified of the possible security breach. Failure to notify your financial institution and local law enforcement can result in
refusal to reimburse funds lost due to fraud or similar criminal activity.
I realize that this is not good news for you. But when you system has been reformatted and reinstalled, I suggest you avoid the file sharing and downloads from unsafe sites.
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Ramnit tutorial with help from Broni.
You will find excellent reformat/reinstall instructions here:
http://www.tech-101.com/support/ind...and-repair-xp-vista-7/page__p__5329#entry5329