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Unknown Trojan


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9 replies to this topic

#1 Li.Victor

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Posted 07 March 2009 - 11:52 AM

Whenever I start up my computer, McAfee pops up and tells me that it had blocked a buffer overflow at C: WINDOWS/SYSTEM32/service.exe . I've scanned and McAfee detects 2 problems. (c:\windows\system32\drivers\568514da.sys and SSDT-HOOK) No matter how many times I remove it, it always seems to come back.

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#2 extremeboy

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Posted 07 March 2009 - 04:52 PM

Hello.

That is a nasty infection you have. Take a read below and let me know if you wish to continue or disinfect.

Posted ImageBackdoor Threat

IMPORTANT NOTE: Unfortunatly One or more of the identified infections is a backdoor trojan.

This allows hackers to remotely control your computer, steal critical system information and download and execute files.

I would counsel you to disconnect this PC from the Internet immediately. If you do any banking or other financial transactions on the PC or if it should contain any other sensitive information, please get to a known clean computer and change all passwords where applicable, and it would be wise to contact those same financial institutions to apprise them of your situation.

Though the trojan has been identified and can be killed, because of it's backdoor functionality, your PC is very likely compromised and there is no way to be sure your computer can ever again be trusted. Many experts in the security community believe that once infected with this type of trojan, the best course of action would be a reformat and reinstall of the OS. Please read these for more information:

How Do I Handle Possible Identify Theft, Internet Fraud and CC Fraud?
When Should I Format, How Should I Reinstall

We can still clean this machine but I can't guarantee that it will be 100% secure afterwards. Let me know what you decide to do.

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.

#3 Li.Victor

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Posted 15 March 2009 - 01:56 PM

hrm. I don't use this PC for much other than gaming, so i'll just clean it up.

#4 DaChew

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Posted 15 March 2009 - 02:52 PM

Please download ATF Cleaner by Atribune & save it to your desktop.
  • Double-click ATF-Cleaner.exe to run the program.
  • Under Main "Select Files to Delete" choose: Select All.
  • Click the Empty Selected button.
  • If you use Firefox browser click Firefox at the top and choose: Select All
  • Click the Empty Selected button.
    If you would like to keep your saved passwords, please click No at the prompt.
  • If you use Opera browser click Opera at the top and choose: Select All
  • Click the Empty Selected button.
    If you would like to keep your saved passwords, please click No at the prompt.
  • Click Exit on the Main menu to close the program.
Note: On Vista, "Windows Temp" is disabled. To empty "Windows Temp" ATF-Cleaner must be "Run as an Administrator".

Please download Malwarebytes Anti-Malware (v1.34) and save it to your desktop.
alternate download link 1
alternate download link 2
If you have a previous version of MBAM, remove it via Add/Remove Programs and download a fresh copy.
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
  • When the installation begins, follow the prompts and do not make any changes to default settings.
  • When installation has finished, make sure you leave both of these checked:
    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
MBAM will automatically start and you will be asked to update the program before performing a scan.
  • If an update is found, the program will automatically update itself.
  • Press the OK button to close that box and continue.
  • If you encounter any problems while downloading the updates, manually download them from here and just double-click on mbam-rules.exe to install. Alternatively, you can update through MBAM's interface from a clean computer, copy the definitions (rules.ref) located in C:\Documents and Settings\All Users\Application Data\Malwarebytes\Malwarebytes' Anti-Malware from that system to a usb stick or CD and then copy it to the infected machine.
On the Scanner tab:
  • Make sure the "Perform Quick Scan" option is selected.
  • Then click on the Scan button.
  • If asked to select the drives to scan, leave all the drives selected and click on the Start Scan button.
  • The scan will begin and "Scan in progress" will show at the top. It may take some time to complete so please be patient.
  • When the scan is finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".
  • Click OK to close the message box and continue with the removal process.
Back at the main Scanner screen:
  • Click on the Show Results button to see a list of any malware that was found.
  • Make sure that everything is checked, and click Remove Selected.
  • When removal is completed, a log report will open in Notepad.
  • The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.
  • Copy and paste the contents of that report in your next reply and exit MBAM.
Note: If MBAM encounters a file that is difficult to remove, you may be asked to reboot your computer so it can proceed with the disinfection process. Regardless if prompted to restart the computer or not, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware. MBAM may "make changes to your registry" as part of its disinfection routine. If using other security programs that detect registry changes (ie Spybot's Teatimer), they may interfere or alert you after scanning with MBAM. Please temporarily disable such programs or permit them to allow the changes.

http://www.bleepingcomputer.com/forums/t/114351/how-to-temporarily-disable-your-anti-virus-firewall-and-anti-malware-programs/
Chewy

No. Try not. Do... or do not. There is no try.

#5 Li.Victor

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Posted 22 March 2009 - 03:29 PM

I did as you said and the buffer overflow pop-up is gone. McAfee doesn't pick up any items either :thumbsup:

Malwarebytes log:

Malwarebytes' Anti-Malware 1.34
Database version: 1885
Windows 5.1.2600 Service Pack 3

3/22/2009 2:12:42 PM
mbam-log-2009-03-22 (14-12-37).txt

Scan type: Quick Scan
Objects scanned: 88188
Time elapsed: 18 minute(s), 52 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 10
Registry Values Infected: 1
Registry Data Items Infected: 2
Folders Infected: 4
Files Infected: 3

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_CLASSES_ROOT\toolbar.tb (Trojan.BHO) -> No action taken.
HKEY_CLASSES_ROOT\toolbar.tb.1 (Trojan.BHO) -> No action taken.
HKEY_CLASSES_ROOT\Interface\{9692be2f-eb8f-49d9-a11c-c24c1ef734d5} (Rogue.FakeAlert) -> No action taken.
HKEY_CLASSES_ROOT\CLSID\{0cb66ba8-5e1f-4963-93d1-e1d6b78fe9a2} (Trojan.BHO) -> No action taken.
HKEY_CLASSES_ROOT\Typelib\{a8954909-1f0f-41a5-a7fa-3b376d69e226} (Rogue.FakeAlert) -> No action taken.
HKEY_CLASSES_ROOT\AppID\{b0e43034-50f5-1f84-8098-824b44f2dbc3} (Adware.AdMedia) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\Stats\{0cb66ba8-5e1f-4963-93d1-e1d6b78fe9a2} (Trojan.BHO) -> No action taken.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{0cb66ba8-5e1f-4963-93d1-e1d6b78fe9a2} (Trojan.BHO) -> No action taken.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\spydefender shield 2.5.2.21 update (Rogue.SpyDefender) -> No action taken.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ApiMon (Rogue.WinAntiSpyware) -> No action taken.

Registry Values Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\kr_done1 (Malware.Trace) -> No action taken.

Registry Data Items Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\AntiVirusDisableNotify (Disabled.SecurityCenter) -> Bad: (1) Good: (0) -> No action taken.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\FirewallDisableNotify (Disabled.SecurityCenter) -> Bad: (1) Good: (0) -> No action taken.

Folders Infected:
C:\Program Files\WinBudget (Adware.AdMedia) -> No action taken.
C:\Program Files\WinBudget\bin (Adware.AdMedia) -> No action taken.
C:\Documents and Settings\All Users\Application Data\CrucialSoft Ltd (Rogue.Multiple) -> No action taken.
C:\Documents and Settings\All Users\Application Data\CrucialSoft Ltd\MS AntiSpyware 2009 (Rogue.Multiple) -> No action taken.

Files Infected:
C:\Program Files\WinBudget\bin\matrix.dat (Adware.AdMedia) -> No action taken.
C:\Program Files\WinBudget\bin\tempzor (Adware.AdMedia) -> No action taken.
C:\WINDOWS\SYSTEM32\kr_done1 (Malware.Trace) -> No action taken.

#6 DaChew

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Posted 22 March 2009 - 05:07 PM

Let MBAM remove the malware, reboot and run a full scan on all drives but CD/dvd
Chewy

No. Try not. Do... or do not. There is no try.

#7 Li.Victor

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Posted 25 March 2009 - 05:50 PM

Malwarebytes didn't pick up anything and my computer is running like normal. Thanks soo much!!

#8 DaChew

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Posted 25 March 2009 - 08:05 PM

A log would allow me to confirm whether you had done a full scan or not and what other steps were required if any.
Chewy

No. Try not. Do... or do not. There is no try.

#9 Li.Victor

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Posted 27 March 2009 - 09:00 PM

well, here it is then :

Malwarebytes' Anti-Malware 1.34
Database version: 1885
Windows 5.1.2600 Service Pack 3

3/24/2009 8:33:59 PM
mbam-log-2009-03-24 (20-33-59).txt

Scan type: Full Scan (A:\|C:\|D:\|E:\|)
Objects scanned: 181859
Time elapsed: 1 hour(s), 21 minute(s), 20 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

#10 DaChew

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Posted 27 March 2009 - 10:38 PM

Well you might be fine now, but be sure and update MBAM and recheck with quick scans from time to time
Chewy

No. Try not. Do... or do not. There is no try.




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