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Removing trojans again and again?


sky77
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Hello,

 

I was tasked with hardening my boss' personal computer at work.  I installed the free version of Zone Alarm, installed AVG free, and I did some scanning and maleware removal with malewarebytes.  Unfortunately, I was approached by him again this afternoon, and he notified me that he has been running malewarebytes daily and discovering the same trojans: they are not being removed and his firewall is disabled again.  For background, he told me that he has not been downloading anything, and when I try cleaning his machine at work, I have to do so without an internet connection because our facility only allows registered MAC addresses to connect.

 

I am attaching the log I saved last time I ran a scan.  It noticed 5 trojans, and I thought they were all removed.  Would someone be able to help me with this situation?  I would hate to have to locate a copy of 7 or 8 and do a clean install.  And, it is hard for me because I do not have internet access at work. 

 

Is there a reason the maleware may not have been removed? 

 

Thanks for your time and assistance.

Malwarebytes Anti-Malware 1.75.0.1300www.malwarebytes.orgDatabase version: v2013.04.04.07Windows Vista Service Pack 2 x86 NTFSInternet Explorer 9.0.8112.16421tod :: TOD-PC [administrator]8/22/2013 1:40:01 PMmbam-log-2013-08-22 (13-40-01).txtScan type: Full scan (C:\|D:\|)Scan options enabled: Memory | Startup | Registry | File System | Heuristics/Extra | Heuristics/Shuriken | PUP | PUMScan options disabled: P2PObjects scanned: 399853Time elapsed: 1 hour(s), 11 minute(s), 52 second(s)Memory Processes Detected: 0(No malicious items detected)Memory Modules Detected: 0(No malicious items detected)Registry Keys Detected: 0(No malicious items detected)Registry Values Detected: 0(No malicious items detected)Registry Data Items Detected: 0(No malicious items detected)Folders Detected: 0(No malicious items detected)Files Detected: 8C:\Program Files\AskSBar\bar\1.bin\NPASKSBR.DLL (Trojan.Agent) -> Quarantined and deleted successfully.c:\program files\google\desktop\install\{9550de80-c3e5-a090-b47e-976ab4b2559c}\   \...\ﯹ๛\{9550de80-c3e5-a090-b47e-976ab4b2559c}\u\00000004.@ (Rootkit.Zaccess) -> Quarantined and deleted successfully.c:\program files\google\desktop\install\{9550de80-c3e5-a090-b47e-976ab4b2559c}\   \...\ﯹ๛\{9550de80-c3e5-a090-b47e-976ab4b2559c}\u\000000cb.@ (Rootkit.0Access) -> Quarantined and deleted successfully.c:\program files\google\desktop\install\{9550de80-c3e5-a090-b47e-976ab4b2559c}\   \...\ﯹ๛\{9550de80-c3e5-a090-b47e-976ab4b2559c}\u\80000000.@ (Trojan.0Access) -> Quarantined and deleted successfully.C:\System Volume Information\SystemRestore\FRStaging\Windows\assembly\GAC\Desktop.ini (Rootkit.0access) -> Quarantined and deleted successfully.C:\Users\tod\AppData\Local\Temp\Low\nwutmtqemijwbiagdbp.bfg (Trojan.Agent.GNI) -> Quarantined and deleted successfully.C:\Users\tod\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\39\6cc00b67-710fda2c (Trojan.Agent.GNI) -> Quarantined and deleted successfully.C:\Windows\assembly\GAC\Desktop.ini (Rootkit.0access) -> Delete on reboot.(end)
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  • Root Admin

One or more of the identified infections is related to a nasty
rootkit component
which is difficult to remove. 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 from a
CLEAN COMPUTER
.  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 connecting 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, delete the partition, reformat and reinstall the Operating System.


Please read:



Should you decide not to follow this 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. If you wish to proceed, disinfection will require more time and more advanced tools.

Please let us know how you would like to proceed.


Message borrowed from quietman7 with minor wording and link changes
 

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Thank you for your help.  Is there any way I can recover the registration key for the current version of Windows my boss has installed?  I might be able to get ahold of some installation discs, but I only have a personal registration key, and I would like to use it for my own computer.  I will also talk to him about reinstalling if I am in the office before Friday.

 

Would you be able to also provide some help regarding the disinfection process?  I can try to obtain the necessary tools as well if I am not able to recover a license key.

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  • Root Admin

Normally you would use OEM MFG Recovery DVD to restore the system back to factory defaults the way the computer was originally shipped.  Typically one does not need to input a key in that case as the MFG takes care of that for you during the install.

 

Depending on the age of the system and the MFG you may be able to send off and obtain Recovery DVD for about $20 or so, otherwise one would need to purchase some type of Windows installer which runs about $150 or so.

 

It's up to you, we can try to clean the system if you like.

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Thanks for your help so far.

 

I do not have a set of recovery discs.  I can't remember if there is a recovery partition.  If there is, could it's data have been tampered with?

 

I do not remember the MFG off the top of my head, but I will try contacting them once I step into work on Friday.

 

Would you be able to describe some of the steps I need to take to clean the system as well?  I can try to do that while I wait for recovery discs if I need them.

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  • Root Admin

If you want to try and clean it then please do the following and post back the log

 

 

Please visit this webpage and read the ComboFix User's Guide:

  • Once you've read the article and are ready to use the program you can download it directly from the link below.
  • Important! - Please make sure you save combofix to your desktop and do not run it from your browser
  • Direct download link for: ComboFix.exe
  • Please make sure you disable your security applications before running ComboFix.
  • Once Combofix has completed it will produce and open a log file.  Please be patient as it can take some time to load.
  • Please attach that log file to your next reply.
  • If needed the file can be located here:  C:\combofix.txt
  • NOTE: If you receive the message "illegal operation has been attempted on a registry key that has been marked for deletion", just reboot the computer.


 

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  • Root Admin

Due to the lack of feedback this topic is closed to prevent others from posting here. If you need this topic reopened, please send a Private Message to any one of the moderating team members. Please include a link to this thread with your request. This applies only to the originator of this thread.

Other members who need assistance please start your own topic in a new thread. Thanks!

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