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I found sysdrv32.sys in my system


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#1 ybha31

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Posted 20 September 2010 - 01:38 AM

I found ''sysdrv32.sys'' in C:\WINDOWS\system32\drivers,and many hiden files named XX.SCR(XX means numbers 1-98),it also have a service named sysdrv32 in my regedit..it made my office PC very slow.truly very slow.I cant do normal work now, even type this letters.
I heard Malwarebytes can kill this ,is that ture?
i have many important files.who can help me = =!

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#2 quietman7

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Posted 21 September 2010 - 12:06 PM

Yes Malwarebytes Anti-Malware can detect this. Whether it can successfully remove it depends on what other malware has been downloaded to your system. Some infections are difficult to remove completely because of their morphing characteristics which allows the malware to regenerate itself. Sometimes there is hidden piece of malware (i.e. rootkit) which has not been detected by your security tools that protects malicious files and registry keys so they cannot be permanently deleted. Other types of malware can even terminate your security tools by changing the permissions on targeted programs so that they cannot run or complete scans.

sysdrv32.sys is a backdoor Trojan that uses rootkit techniques.

Backdoor Trojans, rootkits, Botnets and IRCBots are very dangerous because they compromise system integrity by making changes that allow it to be used by the attacker for malicious purposes. Rootkits are used by backdoor Trojans to conceal its presence (hide from view) in order to prevent detection of an attacker's software and make removal more difficult. Many rootkits can hook into the Windows 32-bit kernel, and patch several APIs to hide new registry keys and files they install. They can disable your anti-virus and security tools to prevent detection and removal. Remote attackers use backdoors as a means of accessing and taking control of a computer that bypasses security mechanisms. This type of exploit allows them to steal sensitive information like passwords, personal and financial data which is send back to the hacker. To learn more about these types of infections, you can refer to:You should disconnect the computer from the Internet and from any networked computers until it is cleaned. If your computer was used for online banking, has credit card information or other sensitive data on it, all passwords should be changed immediately 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 and change all passwords from a clean computer, not the infected one. If not, an attacker may get the new passwords and transaction information. Banking and credit card institutions should be notified immediately 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. If using a router, you need to reset it with a strong logon/password so the malware cannot gain control before connect again.

Although the rootkit was identified and may be removed, your machine has likely been compromised 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 the malware appears to have been removed. In some instances an infection may have caused so much damage to your system that it cannot be completely cleaned or repaired so you can never be sure that you have completely removed all components of a rootkit. The malware may leave so many remnants behind that security tools cannot find them. Tools that claim to be able to remove rootkits cannot guarantee that all traces of it will be 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).



If you have not already done so, you should back up all your important documents, personal data files and photos to a CD or DVD drive as some infections may render your computer unbootable during or before the disinfection process and reformatting may be the only viable alternative. The safest practice is not to backup any files with the following file extensions: exe, .scr, .ini, .htm, .html, .php, .asp, .xml, .zip, .rar, .cab as they may be infected.
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