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Trojan.vundo


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#1 johntesh

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Posted 09 August 2008 - 02:52 PM

I have Symantec Antivirus. This morning I was notified that Trojan.Vundo was detected and quarantined successfully. I checked out what Symantec recommended to do to remove it. It directed me to the Symantec FixVundo removal tool. However, after running this tool in both normal and safe mode, it said that the virus was not found. Is this because it is quarantined? I would think this would be the first place the tool would look.

Under corrective actions Symatec quarantined the infected file and deleted a bunch of registry files. Is this why it wasn't found by the removal tool? Is my computer safe with the virus being quarantined or should I definitely try to remove it completely?

I noticed this thread:

http://www.bleepingcomputer.com/forums/t/18610/how-to-remove-winfixer-virtumonde-msevents-trojanvundob/

Is Vundo Fix the same thing as FixVundo? I assume that it is not. Should I run that or will the virus not be found due to it being quarantined.

I'm not really used to dealing with viruses, so any help you can give me is much appreciated. Thanks.

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#2 boopme

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Posted 09 August 2008 - 02:55 PM

Hello if it was quarantined it is safe there,it cannot harm your PC. Let's do another scan to be sure it is all gone.
Is this an XP machine??

Please download Malwarebytes Anti-Malware and save it to your desktop.
alternate download link 1
alternate download link 2
  • 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.
  • 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. Reagardless 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.
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#3 johntesh

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Posted 09 August 2008 - 03:21 PM

It told me the scan was completed successfully and that no malicious items were detected. Here is the log:

Malwarebytes' Anti-Malware 1.24
Database version: 1036
Windows 5.1.2600 Service Pack 2

4:17:38 PM 8/9/2008
mbam-log-8-9-2008 (16-17-38).txt

Scan type: Quick Scan
Objects scanned: 44118
Time elapsed: 15 minute(s), 2 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)


How does it look? Did Symantec do a good job of cleaning everything up? Should I just leave it in the quarantine?

#4 quietman7

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Posted 09 August 2008 - 04:17 PM

Symantec's FixVundo tool is outdated and not effective against current vundo malware. VundoFix is a specialized tool more effective than Symantec but it too has had difficulty removing current vundo variants. I suspect the anti-virus itself, which is more up to date if you are downloading the daily definition updates, detected and removed the file.

When an anti-virus quarantines a file by moving it into a virus vault (chest), that file is essentially disabled and prevented from causing any harm to your system. The quarantined file is safely held there and no longer a threat until you take action to delete it. One reason for doing this is to prevent deletion of a crucial file that may have been flagged as a "false positive". If that is the case, then you can restore the file and add it to the exclusion or ignore list. Doing this also allows you to view and investigate the files while keeping them from harming your computer. Quarantine is just an added safety measure. When the quarantined file is known to be bad, you can delete it at any time.

Keep in mind, however, that if these files are left in quarantine, other scanning programs and security tools may flag them while in the quarantined area.
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#5 johntesh

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Posted 09 August 2008 - 04:33 PM

So once anything is quarantined, it is safe to delete? I was always afraid to do that in case there were still remnants of the virus floating around somewhere undetected.

Why does Symantec make a removal tool if the Antivirus can take care of it anyway? I think that is what confused me about deleting things in quarantine. Once you click the link for them to explain the virus, it explains how to remove it.

#6 johntesh

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Posted 09 August 2008 - 11:27 PM

I tried VundoFix for the heck of it and it didn't find anything.

#7 quietman7

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Posted 10 August 2008 - 07:42 AM

So once anything is quarantined, it is safe to delete?

Yes.

Why does Symantec make a removal tool if the Antivirus can take care of it anyway?

As I said, it worked on older variants of vundo but was last updated November 30, 2005. The anti-virus program itself is updated regularly.

If there are no more problems or signs of infection, you should Create a New Restore Point to prevent possible reinfection from an old one. Some of the malware you picked up could have been saved in System Restore. Since this is a protected directory your tools cannot access to delete these files, they sometimes can reinfect your system if you accidentally use an old restore point. Setting a new restore point AFTER cleaning your system will help prevent this and enable your computer to "roll-back" to a clean working state.

The easiest and safest way to do this is:
  • Go to Start > Programs > Accessories > System Tools and click "System Restore".
  • Choose the radio button marked "Create a Restore Point" on the first screen then click "Next". Give the R.P. a name, then click "Create". The new point will be stamped with the current date and time. Keep a log of this so you can find it easily should you need to use System Restore.
  • Then use Disk Cleanup to remove all but the most recently created Restore Point.
  • Go to Start > Run and type: Cleanmgr
  • Click "Ok".
  • Click the "More Options" Tab.
  • Click "Clean Up" in the System Restore section to remove all previous restore points except the newly created one.

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#8 johntesh

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Posted 10 August 2008 - 09:14 AM

This is what the Symantec help says about deleting items in quarantine:

Deletes the infected file from your computer's hard drive. If Symantec AntiVirus cannot delete a file, additional information about the action that Symantec AntiVirus took appears in the Notification dialog box and the Event Log.
Use this action only if you can replace the file with a backup copy that is free of viruses or security risks, because the file is permanently deleted and cannot be recovered from the Recycle Bin.
Note: Use this action with caution when you configure actions for security risks, because in some cases, deleting security risks can cause applications to lose functionality.


By replacing the file with a backup, does that mean the trojan's original location? It was found in a program file that I never use, so I really don't care if it loses functionality. Could it cause other applications to not work? Would you delete the file from quarantine or just leave it there?

I think I'll wait a few days to create a new restore point and see if anything strange happens in the meantime. If it hadn't been for Symantec finding it, I'd have no idea I had a trojan since I didn't get a bunch of popup ads or a slow computer. The main thing I'm really worried about is whoever sent it getting credit card info and identity theft. Is there still a chance of that or am I in the clear with it being quarantined?

#9 johntesh

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Posted 10 August 2008 - 07:39 PM

I went ahead and deleted the trojan from quarantine. Symantec said it was successful. I went to run a scan immediately afterward, but it said there was another one already in progress (which I couldn't see). I went to restart my PC, but under the shutdown icon it said something about updates needing to be installed. I clicked to shut it down and as it was shutting down in the light blue screen, it cycled between the phrases "do not turn off or unplug, windows will turn off automatically" and "installing updates."

All of this freaked me out since I've never had this happen before, but I've never deleted something from quarantine. After it turned off, I fired it back up and ran a full scan with Symantec. Nothing was found. I then ran a quick scan of Malwarebytes Anti-malware, and it also found nothing.

Is what happened customary after you delete a file from quarantine? Am I free of this trojan?

#10 johntesh

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Posted 10 August 2008 - 09:44 PM

I decided to do a full scan on Malwarebytes' Anti-Malware after the quick scan didn't find anything. Unfortunately, the full scan found a rogue.agent. Here is the log:

Malwarebytes' Anti-Malware 1.24
Database version: 1036
Windows 5.1.2600 Service Pack 2

10:41:52 PM 8/10/2008
mbam-log-8-10-2008 (22-41-52).txt

Scan type: Full Scan (C:\|)
Objects scanned: 97955
Time elapsed: 1 hour(s), 17 minute(s), 35 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: 1

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:
C:\Program Files\Wolfram Research\Mathematica\6.0\SystemFiles\Links\NETLink\Examples\Part1\Calling DLLs\libbz2-1.0.0.DLL (Rogue.Agent) -> Quarantined and deleted successfully.


What is a Rogue.Agent and is it related to the Trojan.Vundo?

#11 quietman7

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Posted 11 August 2008 - 07:55 AM

There are no shortcuts or guarantees when it comes to malware removal. Sometimes it takes several efforts with different or the same tools to do the job. Even then, with some types of malware infections, the task can be arduous.

Lets do another scan to see if we find anything else that MBAM may have missed.

Please download ATF Cleaner by Atribune & save it to your desktop. alternate download link DO NOT use yet.
Please download and install SUPERAntiSpyware Free
  • Double-click SUPERAntiSypware.exe and use the default settings for installation.
  • An icon will be created on your desktop. Double-click that icon to launch the program.
  • If asked to update the program definitions, click "Yes". If not, update the definitions before scanning by selecting "Check for Updates". (If you encounter any problems while downloading the updates, manually download them from here and unzip into the program's folder.)
  • Under the "Configuration and Preferences", click the Preferences... button.
  • Click the "General and Startup" tab, and under Start-up Options, make sure "Start SUPERAntiSpyware when Windows starts" box is unchecked.
  • Click the "Scanning Control" tab, and 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 a scan just yet.
Reboot your computer in "Safe Mode" using the F8 method. To do this, restart your computer and after hearing your computer beep once during startup (but before the Windows icon appears) press the F8 key repeatedly. A menu will appear with several options. Use the arrow keys to navigate and select the option to run Windows in "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 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".

Scan with SUPERAntiSpyware as follows:
  • Launch the program and back on the main screen, under "Scan for Harmful Software" click Scan your computer.
  • On the left, make sure you check C:\Fixed Drive.
  • On the right, under "Complete Scan", choose Perform Complete Scan and click "Next".
  • After the scan is complete, a Scan Summary box will appear with potentially harmful items that were detected. Click "OK".
  • Make sure everything has a checkmark next to it and click "Next".
  • A notification will appear that "Quarantine and Removal is Complete". Click "OK" and then click the "Finish" button to return to the main menu.
  • 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.

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#12 johntesh

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Posted 11 August 2008 - 11:02 AM

Here it is:

SUPERAntiSpyware Scan Log
http://www.superantispyware.com

Generated 08/11/2008 at 11:48 AM

Application Version : 4.15.1000

Core Rules Database Version : 3532
Trace Rules Database Version: 1521

Scan type : Complete Scan
Total Scan Time : 01:34:07

Memory items scanned : 182
Memory threats detected : 0
Registry items scanned : 5826
Registry threats detected : 0
File items scanned : 81372
File threats detected : 11

Unclassified.Unknown Origin
C:\#GARRETT\PROGRAM DOWNLOADS\FILES\KEYGEN.EXE

Malware.Installer-Pkg/Gen
C:\DOCUMENTS AND SETTINGS\ALL USERS\APPLICATION DATA\WILDTANGENT\DELL GAME CONSOLE\DOWNLOADS\INSTALLERS\{26D2C2C3-CF14-4ED7-B1FC-0BE64AFBA3B3}.EXE
C:\DOCUMENTS AND SETTINGS\ALL USERS\APPLICATION DATA\WILDTANGENT\DELL GAME CONSOLE\DOWNLOADS\INSTALLERS\{3C48F877-A164-45E9-B9DA-26A049FFC207}.EXE
C:\DOCUMENTS AND SETTINGS\ALL USERS\APPLICATION DATA\WILDTANGENT\DELL GAME CONSOLE\DOWNLOADS\INSTALLERS\{6293BC00-4EB8-4C65-8548-53E2FC3BF937}.EXE
C:\DOCUMENTS AND SETTINGS\ALL USERS\APPLICATION DATA\WILDTANGENT\DELL GAME CONSOLE\DOWNLOADS\INSTALLERS\{651956B7-1969-42AA-9453-E0B813019D54}.EXE
C:\DOCUMENTS AND SETTINGS\ALL USERS\APPLICATION DATA\WILDTANGENT\DELL GAME CONSOLE\DOWNLOADS\INSTALLERS\{6B6A7665-DB48-4762-AB5D-BEEB9E1CD7FA}.EXE
C:\DOCUMENTS AND SETTINGS\ALL USERS\APPLICATION DATA\WILDTANGENT\DELL GAME CONSOLE\DOWNLOADS\INSTALLERS\{989E4C3B-B2C9-4486-9A09-D5A8F953837C}.EXE
C:\DOCUMENTS AND SETTINGS\ALL USERS\APPLICATION DATA\WILDTANGENT\DELL GAME CONSOLE\DOWNLOADS\INSTALLERS\{C0A0AA4D-C79B-48CA-8843-2B02B626C9E6}.EXE
C:\DOCUMENTS AND SETTINGS\ALL USERS\APPLICATION DATA\WILDTANGENT\DELL GAME CONSOLE\DOWNLOADS\INSTALLERS\{C2D8F0E2-6978-4409-8351-BA8785DA11EE}.EXE
C:\DOCUMENTS AND SETTINGS\ALL USERS\APPLICATION DATA\WILDTANGENT\DELL GAME CONSOLE\DOWNLOADS\INSTALLERS\{D1A6F3FD-7B40-443F-8767-BADB25A0D222}.EXE
C:\DOCUMENTS AND SETTINGS\ALL USERS\APPLICATION DATA\WILDTANGENT\DELL GAME CONSOLE\DOWNLOADS\INSTALLERS\{E0814F95-5380-4892-B8C8-7FA4B349EF46}.EXE


Wildtangent isn't a big deal, right? What is that other one? Is it related to Trojan.vundo or something else entirely? What should I do next? Thanks!

#13 quietman7

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Posted 11 August 2008 - 11:26 AM

keygen.exe could be Backdoor.W32.Agent

However, the name seems to be related to other possible infections too:
keygen.exe malware
keygen.exe

I also found hits to suggest it could be related to a crack tool.

Cracking applications are used for illegally breaking (cracking) various copy-protection and registration techniques used in commercial software. These programs may be distributed via Web sites, Usenet, and P2P networks.

trendmicro.com/vinfo

The practice of using crack or keygen tools is not only considered illegal activity but it is a serious security risk. If you use those kind of programs, be forewarned that some of the worst types of malware infections can be contracted and spread by visiting crack, keygen, warez and other pirated software sites. In many cases, these sites are infested with a smörgåsbord of malware. Those who attempt to get software for free can end up with a computer system so badly damaged that recovery is not possible and it cannot be repaired. When that happens there is nothing you can do besides reformatting and reinstalling the OS.
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#14 johntesh

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Posted 11 August 2008 - 11:42 AM

So in any case, I should remove it from quarantine? Are there any other scans or things I should do?

#15 quietman7

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Posted 11 August 2008 - 11:55 AM

Yes, delete your quarantined items and let me know how your computer running and if they are any more reports/signs of infection?

If that file was not a crack tool you downloaded yourself, be aware that backdoor Trojans are very dangerous because they provide a means of accessing a computer system that bypasses security mechanisms and steal sensitive information like passwords, personal and financial data which they send back to the hacker. Remote attackers use backdoor Trojans as part of an exploit to gain unauthorized access to a computer and take control of it without your knowledge. Read Danger: Remote Access Trojans.

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. 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 backdoor Trojan 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 the backdoor Trojan has been removed the computer is now secure. Further, 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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