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Computer taken over by virus


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#1 Rugree

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Posted 15 October 2009 - 02:16 PM

One of my computers have been taken over by what I presume would be a virus. I had Norton AV but it didn't detect it.

Unfortunately, I'm having a very hard time fixing it. It won't let me run HiJackThis, MalwareBytes, Search&Destroy or Norton AV. The only application that seems to run is SUPERAntispyware and I have to reinstall after a restart.

If I try to run the aforementioned programs, it crashes and seems to replace the .exe file with something else (or perhaps removes the .exe extension) but then it won't allow me to rename it (permission denied). Renaming the program .exe file (ie, renaming mbam.exe to cbam.exe) still causes the above. Running in Safe Mode does not change the outcome of this.

SUPERAntispyware is able to run and it has found and removed some Trojans but it seems to be having an issue removing this one. What should I do now?

Edited by Rugree, 15 October 2009 - 02:47 PM.


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#2 boopme

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Posted 15 October 2009 - 03:09 PM

Hello, try this
1. Uninstall Malwarebytes' Anti-Malware using Add/Remove programs in the control panel.
2. Restart your computer (very important).
3. Download and run this utility. Mbam clean
4. It will ask to restart your computer (please allow it to).
5. After the computer restarts, install the latest version from here. http://www.malwarebytes.org/mbam-download.php
Note: You will need to reactivate the program using the license you were sent.
Note: If using Free version, ignore the part about putting in your license key and activating.
Launch the program and set the Protection and Registration.
Then go to the UPDATE tab if not done during installation and check for updates.
Restart the computer again and verify that MBAM is in the task tray and run a Quick Scan and post that log.
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#3 Rugree

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Posted 15 October 2009 - 03:42 PM

I'm currently running an online av scanner and it has found 3 issues (30% done) but it's going to take a while to finish scanning.

I don't have issues reinstalling Malwarebytes. Infact, once it "crashes" and the virus does it's thing with renaming/deleting the .exe and locking it, I can reinstall it and run it again (rinse and repeat). But I will try this once the scanner finishes and hopefully removes the viruses.

#4 boopme

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Posted 15 October 2009 - 03:46 PM

OK let me know. Post the online scan log.
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#5 Rugree

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Posted 16 October 2009 - 08:27 AM

The scan found several viruses (kaspersky online AV):

Trojan.Spy.Win32.Agent.bahu
Packed.Win32.Krap.w
Packed.Win32.TDSS.aa

I tried to install Avast AV but it did not remove the viruses.

I did what you said but it still doesn't work. I ran the mbam cleaner. Restarted. Reinstalled Mbam, enabled Protection and tried to scan. But same thing happens. It tries to scan and after 4 seconds, it crashes. The .exe file gets deleted/renamed and locked.

#6 Rugree

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Posted 16 October 2009 - 08:57 AM

Actually, from the Kaspersky Online AV scanner, it seems just to be the Trojan-Spy.Win32.Agent.bahu. The other 2 viruses were in Norton AV quarantine area.

#7 Rugree

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Posted 16 October 2009 - 10:57 AM

I ran AVG free in Safe mode and it removed something (it did not log it to file unfortunately) but I'm still having issues with running anything.

I redid the Mbam clean but same issue. If I run a scan using Mbam, it will start for a few seconds and then die. Then the .exe file disappears and gets locked and I'm unable to use it anymore. Same for the other applications like HiJackThis and Search&Destroy.

How do I remove this virus?

#8 boopme

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Posted 16 October 2009 - 11:53 AM

Man ! Let's try these.
Next run ATF and SAS:
Note.. SAS doesn't open the registry hives for other user accounts on the system, so scans should be done from each user account.

Note: On Vista, "Windows Temp" is disabled. To empty "Windows Temp" ATF-Cleaner must be "Run as an Administrator".

From your regular user account..
Download Attribune's ATF Cleaner and then SUPERAntiSpyware , Free Home Version. Save both to desktop ..
DO NOT run yet.
Open SUPER from icon and install and Update it
Under Scanner Options make sure the following are checked (leave all others unchecked):
Close browsers before scanning.
Scan for tracking cookies.
Terminate memory threats before quarantining
.
Click the "Close" button to leave the control center screen and exit the program. DO NOT run yet.

Now reboot into Safe Mode: How to enter safe mode(XP)
Using the F8 Method
Restart your computer.
When the machine first starts again it will generally list some equipment that is installed in your machine, amount of memory, hard drives installed etc. At this point you should gently tap the F8 key repeatedly until you are presented with a Windows XP Advanced Options menu.
Select the option for Safe Mode using the arrow keys.
Then press enter on your keyboard to boot into Safe Mode
.

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 or Opera browser click that browser 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
.

NOW Scan with SUPER
Open from the desktop icon or the program Files list
On the left, make sure you check C:\Fixed Drive.
Perform a Complete scan. After scan,Verify they are all checked.
Click OK on the summary screen to quarantine all found items.
If asked if you want to reboot, click "Yes" and reboot normally.

To retrieve the removal information after reboot, launch SUPERAntispyware again.
Click Preferences, then click the Statistics/Logs tab.
Under Scanner Logs, double-click SUPERAntiSpyware Scan Log.
If there are several logs, click the current dated log and press View log.
A text file will open in your default text editor.
Please copy and paste the Scan Log results in your next reply.
Click Close to exit the program.


Please ask any needed questions,post logs and Let us know how the PC is running now.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#9 Rugree

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Posted 16 October 2009 - 12:16 PM

Also, I tried to install Kaspersky Internet Security 2010 seeing as the Online AV scanner found that virus, I presumed that the regular AV may have a chance to remove it. No such luck. The virus seems to have disabled it and now I can't even uninstall it (gives error). When I tried to initiate a scan, it crashed and the taskbar icon stated that it was removed from memory

Following your instructions and doing a SUPER is scanning right now.

I don't feel comfortable having this computer online so I burned the programs to a CD. I also burned the updates for SUPER onto a CD and manually updated it. (http://www.superantispyware.com/definitions.html).

Will post back when the scan finishes.

#10 Rugree

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Posted 16 October 2009 - 12:19 PM

Nevermind that. SuperAntispyware crashed and suffered the same fate as the others >_<

#11 boopme

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Posted 16 October 2009 - 12:28 PM

Rats. It looks like there is a rootkit variant on here. The rootkit itself is a protection module used to terminate a variety of security tools by changing the permissions on targeted programs so that they cannot run or complete scans. There are some new variants of rootkits in the wild right now that will require custom scripts to remove the infection, the process must be completed by HJT team members or above.

Failure to follow the proper removal process can and will cause serious damage to a machine. Recovery of the machine may be difficult, if not impossible.


Download this Utility and save it to your Desktop.
Double-click the Utility to run it and and let it finish.
When it states Finished! Press any key to exit, press any key to close the program.
It will save a .txt file to your desktop automatically. Double-click on the Win32kDiag.txt file that is located on your Desktop and post the entire contents of that log as part of the reply in the topic you will create below..

Next please go here HijackThis Logs and Virus/Trojan/Spyware/Malware Removal ,click New Topic,give it a relevant Title and post the above Win32kDiag.exe log.

Let me know how that went.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#12 Rugree

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Posted 16 October 2009 - 12:58 PM

Thank you. I have posted in that forum with the Win32kDiag file.




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