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Google links get redirected to poiskin.ru


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3 replies to this topic

#1 dave426

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Posted 10 April 2009 - 04:59 PM

I Run Windows XP (with all the latest updates), IE 8 as a browser, and AVG Free 8.5. It just came to my attention that I have been infected with something.

The symptoms:
-When I do a google search, and click on a resulting link, I get sent to "poiskin.ru/check?[a bunch of characters], then generally redirect to some random website about recipes or a dictionary, etc...
-Sometimes, rather than redirect, IE 8 says there is a connection problem. I hit the fix button and it fixes the problem, from then on it seems to work normally.

The attempts:
-AVG doesn't seem to realize there is a problem at all, I don't think it can detect it.
-When I run the (Microsoft) OneCare Safety Scanner it finds and removes three files (two of them pending a restart), but the files are always there when I reboot and scan again. However, I cannot ever see the files myself, even with "show hidden files" and "show protected operating system files" turned on.
-I then ran a utility called "catchme" from gmer.net. It performs a quick scan and then lists the following results (I'm only pasting the relevant text):

scanning hidden services ...
HKLM\SYSTEM\CurrentControlSet\Services\Parportigowpcyxxgaapstwxmnhpiiemsqpgjt

scanning hidden files ...
C:\Documents and Settings\Administrator\Local Settings\Temp\ovfsthhigowpcyxxgaapstwxmnhpiiemsqpgjt000 0 bytes
C:\Documents and Settings\Neferata\Local Settings\Temporary Internet Files\Content.IE5\5FVWIRZM\OVFSTH.SYS[1].htm 8192 bytes
C:\Documents and Settings\Neferata\Local Settings\Temporary Internet Files\Content.IE5\A2OY65UE\OVFSTH.SYS[1].htm 8192 bytes
C:\WINDOWS\system32\drivers\ovfsthhewyceocqwysssvabkwbqkwtgecfkxtt.sys 86016 bytes
C:\WINDOWS\system32\ovfsthbphebecsnpnpikabnakmexkxlxicjqif.dat 48 bytes
C:\WINDOWS\system32\ovfsthdipxclnrevcsgjybjtmvmrbhcnkcjgqi.dll 20480 bytes
C:\WINDOWS\system32\ovfsthgmuggbsoeprhfrpgqnsnlomaxvukario.dll 61440 bytes
C:\WINDOWS\system32\ovfsthgsrrdnxevkviujfhprreepbkfttjokme.dll 20480 bytes
C:\WINDOWS\system32\ovfsthqqxfjbqgxqbisjqsusoasvfblkdqehsw.dat 28672 bytes

These extraordinarily long-named files are certainly a problem, but I cannot see them myself in a browser and I haven't stumbled on a way to remove them. The three dlls, by the way, are the files that OneCare finds but fails to remove. I looked up the registry entry that the log listed, but all I could find were two instances of:
HKLM\SYSTEM\CurrentControlSet\Services\Parport
which appears to be a legitimate printer driver.

I ran ComboFix, but afterwards "catchme" still shows the exact same log on its scan. I even (yes I know, I shouldn't have) tried making a CFscript file referring to the items listed above, but no luck there either.

There don't appear to be any unusual processes running.

Any help would be greatly appreciated.

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#2 extremeboy

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Posted 10 April 2009 - 08:15 PM

Hello.

I ran ComboFix, but afterwards "catchme" still shows the exact same log on its scan. I even (yes I know, I shouldn't have) tried making a CFscript file referring to the items listed above, but no luck there either.

That is very dangerous and perhaps there are certain things you didn't do it correctly. Sometimes there are other things that needs to be done as well. I will not go into details to that since this is not the appropriate forum to be talking about this.

That is a rootkit/backdoor you have on your machine. Your machine is compromised and you should format the computer now.

Posted ImageRootkit Threat

Unfortunatly One or more of the identified infections is a Rootkit/backdoor trojan.

IMPORTANT NOTE: Rootkits 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, you should immediately disconnect from the Internet until your system is cleaned. 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. You should change each password 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 before connect again. Banking 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 has been identified and may be 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:Should you decide not to follow that advice, we will do our best to help clean the computer of any infections but we cannot guarantee it to be trustworthy or that the removal will be successful. Tell me what you want to do.

With Regards,
Extremeboy
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#3 dave426

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Posted 10 April 2009 - 09:15 PM

Thank you for your reply. This is a secondary machine with no sensitive information on it. So,

1.) I would like to have a go at cleaning it without reformatting. Afterwords I may decide to reformat it anyway, as per your advice, but I am curious to see what the cleaning process is like and how successful it is. I am always curious to learn.

2.) In the meantime, are there any particular steps I should take to protect other computers on my network? They are all plugged into a router via ethernet. Is just the one computer compromised, or the whole network? Our other computers are running Vista (with User Account Control on), and OneCare antivirus/firewall. Also, they have different usernames/passwords.

#4 extremeboy

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Posted 11 April 2009 - 10:17 AM

Hello.

You should start a topic in the HJT-Malware Removal forum. Rootkits are nasty and there are probably more things on your computer.

For now, you shouldn't use the infected computer to post, better to disconnect and use another machine as mentioned in my previous post.

1st Step: Preparation Guide Before Starting a Topic: http://www.bleepingcomputer.com/forums/t/34773/preparation-guide-for-use-before-using-malware-removal-tools-and-requesting-help/
2nd Step: Starting a Topic in the HJT-Malware Removal forum: http://www.bleepingcomputer.com/forums/f/22/virus-trojan-spyware-and-malware-removal-logs/

Good Luck!

With Regards,
Extremeboy
Note: Please do not PM me asking for help, instead please post it in the correct forum requesting for help. Help requests via the PM system will be ignored.

If I'm helping you and I don't reply within 48 hours please feel free to send me a PM.

The help you receive here is always free but if you wish to show your appreciation, you may wish to Posted Image.




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