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W32/Backdoor2.EMEB [Moved]


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#1 Druco

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Posted 30 May 2009 - 04:03 PM

Today my AT&T Internet security Suite identified a virus called W32/Backdoor2.EMEB and quarantined it. A pop up window then asked me for my Win XP SP3 disk to be able to copy the original files, "ftp.exe" , back to locations C:\WINDOWS\ServicePackFiles\i386\ftp.exe, C:\WINDOWS\system32\dllcache\ftp.exe, and C:\WINDOWS\system32\ftp.exe.

I this a new virus? I could not find it in your data base.

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#2 boopme

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Posted 30 May 2009 - 11:11 PM

Let's run this while I lookm into it.

Now run MBAM (MalwareBytes):

Please download Malwarebytes Anti-Malware and save it to your desktop.
alternate download link 1
alternate download link 2

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. Temporarily disable such programs or permit them to allow the changes.
  • 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 definition 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. Be sure to post the complete log to include the top portion which shows MBAM's database version and your operating system.
  • Exit MBAM when done.
Note: If MBAM encounters a file that is difficult to remove, you will be asked to reboot your computer so MBAM can proceed with the disinfection process. If asked to restart the computer, 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 Druco

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Posted 31 May 2009 - 04:02 AM

Here is my Malwarebytes log:

Malwarebytes' Anti-Malware 1.37
Database version: 2199
Windows 5.1.2600 Service Pack 3

5/31/2009 4:45:50 AM
mbam-log-2009-05-31 (04-45-50).txt

Scan type: Quick Scan
Objects scanned: 99569
Time elapsed: 6 minute(s), 27 second(s)

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

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{d08d9f98-1c78-4704-87e6-368b0023d831} (Adware.RelevantKnowledge) -> Quarantined and deleted successfully.

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
C:\Program Files\RelevantKnowledge (Spyware.Marketscore) -> Quarantined and deleted successfully.

Files Infected:
c:\program files\relevantknowledge\rlservice.exe (Spyware.Marketscore) -> Quarantined and deleted successfully.
c:\program files\relevantknowledge\rlvknlg.exe (Spyware.Marketscore) -> Quarantined and deleted successfully.

#4 boopme

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Posted 31 May 2009 - 05:16 PM

OK insert your CD and let that repair the files. Please also run Dr Web

Before we start fixing anything you should print out these instructions or copy them to a NotePad file so they will be accessible. Some steps will require you to disconnect from the Internet or use Safe Mode and you will not have access to this page.

Please download Dr.Web CureIt and save it to your desktop. DO NOT perform a scan yet.
alternate download link
Note: The file will be randomly named (i.e. 5mkuvc4z.exe).

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".

Scan with Dr.Web CureIt as follows:
  • Double-click on the randomly named file to open the program and click Start. (There is no need to update if you just downloaded the most current version
  • Read the Virus check by DrWeb scanner prompt and click Ok where asked to Start scan now? Allow the setup.exe to load if asked by any of your security programs.
  • The Express scan will automatically begin.
    (This is a short scan of files currently running in memory, boot sectors, and targeted folders).
  • If prompted to dowload the Full version Free Trial, ignore and click the X to close the window.
  • If an infected object is found, you will be prompted to move anything that cannot be cured. Click Yes to All. (This will move any detected files to the C:\Documents and Settings\userprofile\DoctorWeb\Quarantine folder if they can't be cured)
  • After the Express Scan is finished, put a check next to Complete scan to scan all local disks and removable media.
  • In the top menu, click Settings > Change settings, and uncheck "Heuristic analysis" under the "Scanning" tab, then click Apply, Ok.
  • Back at the main window, click the green arrow "Start Scanning" button on the right under the Dr.Web logo.
  • Please be patient as this scan could take a long time to complete.
  • When the scan has finished, a message will be displayed at the bottom indicating if any viruses were found.
  • Click Select All, then choose Cure > Move incurable.
  • In the top menu, click file and choose save report list.
  • Save the DrWeb.csv report to your desktop.
  • Exit Dr.Web Cureit when done.
  • Important! Reboot your computer because it could be possible that files in use will be moved/deleted during reboot.
  • After reboot, post the contents of the log from Dr.Web in your next reply. (You can use Notepad to open the DrWeb.cvs report)
Next Rerun MBAM like this:

Open MBAM in normal mode and click Update tab, select Check for Updates,when done
click Scanner tab,select Quick scan and scan.
After scan click Remove Selected, Post new scan log and Reboot into normal mode.

How is the PC running now.

Edited by boopme, 31 May 2009 - 05:18 PM.

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

#5 boopme

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Posted 01 June 2009 - 05:07 PM

To both posters..
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.
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

#6 Druco

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Posted 01 June 2009 - 11:02 PM

I was able to run Dr. Web CureIt in the quick scan mode, but was unable to get the full scan mode to complete. It would get hung up on one file and just stay there for hours. I tried twice with the same result. It was even difficult to close the program once it would hang up. I had to resort to killing the process using the task manager.

This is the results of the initial quick scan run of Dr. Web

ProduKey.exe;C:\Documents and Settings\HP_Administrator\My Documents\Microsoft USB Flash Drive Backup\Kingston;Tool.ProductKey.2;Moved.;
ProduKey.exe;C:\Documents and Settings\HP_Administrator\My Documents\produkey;Tool.ProductKey.2;Moved.;

I think this is a product key reader that I have used since January.

I read your note on this problem being a back door Trojan, if that is so why is there no other reference to it in the database?

I run a tight outgoing firewall and have verified that there are no holes in it that I don't know about, so I am not as concerned as maybe I should be. My machine runs fine with no other problems that I know of.

Update:

I have now read on several sites that this is turning out to a false indicator based on faulty A/V definitions that were updated on 5/31 by ISPs that provide virus detection products for their clients. Here is a link to one of them "Bell Support Forums"
http://forums.bell.ca/viewtopic.php?f=17&a...c4bf3c1001f582d

I think you folks do real good work and admire your capabilities. Please let me know what you think of all this.

Thanks

#7 boopme

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Posted 02 June 2009 - 10:34 AM

Yes it is most likely a False positive ..
Do you still have that file on the PC ,in quarantine or somewhere?
If so let's send it for a second opiion.
Please make sure that you can view all hidden files. Instructions on how to do this can be found here:

How to see hidden files in Windows

Please click this link-->Jotti

When the jotti page has finished loading, click the Browse button and navigate to the following file and click Submit.

<filepath>suspect.file

Please post back the results of the scan in your next post.

If Jotti is busy, try the same at Virustotal: http://www.virustotal.com/
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

#8 Druco

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Posted 02 June 2009 - 11:47 AM

I submitted all three instances of the file ftp.exe that were quarantined by my A/V software to Jotti's and 20 out of 20 found nothing.

#9 boopme

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Posted 02 June 2009 - 10:15 PM

It is definately a FP. Any other issues alive on here?
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

#10 Druco

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Posted 03 June 2009 - 02:02 AM

No I don't think so. Thanks for your help.

#11 boopme

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Posted 03 June 2009 - 09:18 AM

Ok,good. Let's just be certain those others are removed.

Rerun MBAM like this:

Open MBAM in normal mode and click Update tab, select Check for Updates,when done
click Scanner tab,select Quick scan and scan.
After scan click Remove Selected, Post new scan log and Reboot into normal mode.
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 boopme

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Posted 03 June 2009 - 05:15 PM

Now 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 backed up, renamed and 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". Disk Cleanup will scan your files for several minutes, then open.
  • Click the "More Options" tab, then click the "Clean up" button under System Restore.
  • Click Ok. You will be prompted with "Are you sure you want to delete all but the most recent restore point?"
  • Click Yes, then click Ok.
  • Click Yes again when prompted with "Are you sure you want to perform these actions?"
  • Disk Cleanup will remove the files and close automatically.
Vista Users can refer to these links: Create a New Restore Point and Disk Cleanup.
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

#13 Druco

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Posted 03 June 2009 - 10:52 PM

Here is the last MBAM scan log:

Malwarebytes' Anti-Malware 1.37
Database version: 2199
Windows 5.1.2600 Service Pack 3

6/3/2009 11:42:54 PM
mbam-log-2009-06-03 (23-42-54).txt

Scan type: Quick Scan
Objects scanned: 100900
Time elapsed: 7 minute(s), 7 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

#14 boopme

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Posted 04 June 2009 - 10:48 AM

Looks good.. now do the Restore point and you're good to go! Thanks for coming to BC.
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




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