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Combofix


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#1 JDowns

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Posted 12 October 2008 - 10:26 PM

Not sure if this has been posted or addressed. Also not sure if this is the correct sub-forum in which to post.

I ran across a rootkit today that in its childish manner targets combofix.exe and gmer.exe.

The rootkit initially popped up a window on the initialization of combofix that executable was "x" days old and would have to run under minimal settings. I believe combofix started and ended at stage "49".

After a reboot and the rootkit was still in operation combofix failed to start.

Simply renaming Combofix.exe allowed the executable to run and remove the rootkit.

Can post logs if wanted/needed.


BTW thank you for such a great utility.

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#2 quietman7

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Posted 14 October 2008 - 01:25 PM

Please note the message text in blue at the top of this forum.

You should not be using Combofix unless instructed to do so by a Malware Removal Expert who can interpret the logs. It is a powerful tool intended by its creator to be "used under the guidance and supervision of an expert", NOT for private use. Using this tool incorrectly could lead to disastrous problems with your operating system such as preventing it from ever starting again. Please read Combofix's Disclaimer.

Further, ComboFix logs are not permitted outside the HijackThis forums and then only when requested by a HJT Team member.

Rootkits component and backdoor Trojans are very dangerous because they use advanced techniques (backdoors) as a means of accessing a computer system that bypasses security mechanisms and steal sensitive information which they send back to the hacker. Many rootkits can hook into the Windows 32-bit kernel, and patch several APIs to hide new registry keys and files they install. Remote attackers use backdoor Trojans and rootkits as part of an exploit to gain unauthorized access to a computer and take control of it without your knowledge.

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 online forums. You should consider them to be compromised. They should be changed by using a different computer and not the infected one. If not, an attacker may get the new passwords and transaction information. If using a router, you need to reset it with a strong logon/password so the malware cannot gain control again. and credit card institutions should be notified of the possible security breach. Because your computer was compromised please read How Do I Handle Possible Identify Theft, Internet Fraud and CC Fraud?

Although the rootkit was identified and removed, your PC 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 that because this malware has been removed the computer is now secure. In some instances an infection may have caused so much damage to your system that it cannot be completely cleaned or repaired. The malware may leave so many remnants behind that security tools cannot find them. 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:

"When should I re-format? How should I reinstall?"
"Help: I Got Hacked. Now What Do I Do?"
"Where to draw the line? When to recommend a format and reinstall?"

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#3 oblivion8743

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Posted 01 August 2011 - 03:58 PM

I'm running combofix in safe mode, but it's been stuck at stage 49 for about half an hour.

Sorry, wrong thread.




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