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Trojan.DNSChanger


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I have a problem whereby malwarebytes anti malware finds three bad items in my registry and marks them Trojan.DNSChanger. Whether I let malwarebytes anti malware remove them, or whether I correct the DNS addresses in these registry items, and correct the LAConnection TCP/IPv4 DNS addresses, every time I reboot the PC they come back again changed to some **** in the Ukraine. My McAfee Total Protection comes up with nothing on a full scan. No matter what I do nothing seems to clean it or even find the source of it (and believe me as a moderately techy complete amateur I have tried everything I can think of in the last 24 hours - except sleeping on it!). Please can anyone help me get my PC back safe and doing what it should? I've attached the mbam log. Thanks in advance.

mbam_log_2010_06_24__13_30_32_.txt

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Hello simongdawson! Welcome to Malwarebytes' Anti-Malware Forums!

My name is Borislav and I will be glad to help you solve your problems with malware. Before we begin, please note the following:

  • The process of cleaning your system may take some time, so please be patient.
  • Follow my instructions step by step if there is a problem somewhere, stop and tell me.
  • Stay with the topic until I tell you that your system is clean. Missing symptoms does not mean that everything is okay.
  • Instructions that I give are for your system only!
  • If you don't know or can't understand something please ask.
  • Do not install or uninstall any software or hardware, while work on.
  • Keep me informed about any changes.

Please follow these instructions and post all logs if you can:

http://forums.malwarebytes.org/index.php?showtopic=9573

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Hi Borislav. Thanks for helping me.

Defogger DID say finished but did not ask for a reboot. The defogger_disable log reads:

defogger_disable by jpshortstuff (23.02.10.1)

Log created at 21:31 on 24/06/2010 (Simon)

Checking for autostart values...

HKCU\~\Run values retrieved.

HKLM\~\Run values retrieved.

Checking for services/drivers...

-=E.O.F=-

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mbam-log

Malwarebytes' Anti-Malware 1.46

www.malwarebytes.org

Database version: 4239

Windows 6.0.6002 Service Pack 2

Internet Explorer 8.0.6001.18928

25/06/2010 20:00:23

mbam-log-2010-06-25 (20-00-23).txt

Scan type: Quick scan

Objects scanned: 151651

Time elapsed: 10 minute(s), 33 second(s)

Memory Processes Infected: 0

Memory Modules Infected: 0

Registry Keys Infected: 0

Registry Values Infected: 0

Registry Data Items Infected: 3

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:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DhcpNameServer (Trojan.DNSChanger) -> Data: 93.188.162.53,93.188.161.183 -> No action taken.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\NameServer (Trojan.DNSChanger) -> Data: 93.188.162.53,93.188.161.183 -> No action taken.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{33c415be-11d7-44c0-9c18-51626cc71bba}\DhcpNameServer (Trojan.DNSChanger) -> Data: 93.188.162.53,93.188.161.183 -> No action taken.

Folders Infected:

(No malicious items detected)

Files Infected:

(No malicious items detected)

DDS.txt

DDS (Ver_10-03-17.01) - NTFSx86

Run by Simon at 14:27:06.65 on 25/06/2010

Internet Explorer: 8.0.6001.18928 BrowserJavaVersion: 1.6.0_20

Microsoft

ark.zip

Attach.zip

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Malwarebytes' Anti-Malware 1.46

www.malwarebytes.org

Database version: 4244

Windows 6.0.6002 Service Pack 2

Internet Explorer 8.0.6001.18928

26/06/2010 18:01:48

mbam-log-2010-06-26 (18-01-48).txt

Scan type: Quick scan

Objects scanned: 151489

Time elapsed: 9 minute(s), 19 second(s)

Memory Processes Infected: 0

Memory Modules Infected: 0

Registry Keys Infected: 0

Registry Values Infected: 0

Registry Data Items Infected: 3

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:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DhcpNameServer (Trojan.DNSChanger) -> Data: 93.188.162.53,93.188.161.183 -> Quarantined and deleted successfully.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{33c415be-11d7-44c0-9c18-51626cc71bba}\DhcpNameServer (Trojan.DNSChanger) -> Data: 93.188.162.53,93.188.161.183 -> Quarantined and deleted successfully.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{33c415be-11d7-44c0-9c18-51626cc71bba}\NameServer (Trojan.DNSChanger) -> Data: 93.188.162.53,93.188.161.183 -> Quarantined and deleted successfully.

Folders Infected:

(No malicious items detected)

Files Infected:

(No malicious items detected)

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**Note: If you need more detailed information, please visit the web page of ComboFix in BleepingComputer. **

Please note that these fixes are not instantaneous. Most infections require more than one round to properly eradicate.

Stay with me until given the 'all clear' even if symptoms diminish. Lack of symptoms does not always mean the job is complete.

Kindly follow my instructions and please do no fixing on your own or running of scanners unless requested by me or another helper.

Please download ComboFix from

Here or Here to your Desktop.

**Note: In the event you already have Combofix, this is a new version that I need you to download. It is important that it is saved and renamed following this process directly to your desktop**

  1. If you are using Firefox, make sure that your download settings are as follows:
    • Open Tools -> Options -> Main tab
    • Set to Always ask me where to Save the files.

[*]During the download, rename Combofix to Combo-Fix as follows:

CF_download_FF.gif

CF_download_rename.gif

[*]It is important you rename Combofix during the download, but not after.

[*]Please do not rename Combofix to other names, but only to the one indicated.

[*]Close any open browsers.

[*]Close/disable all anti virus and anti malware programs so they do not interfere with the running of ComboFix.

-----------------------------------------------------------

  • Very Important! Temporarily disable your anti-virus, script blocking and any anti-malware real-time protection before performing a scan. They can interfere with ComboFix or remove some of its embedded files which may cause unpredictable results.
  • Click on this link to see a list of programs that should be disabled. The list is not all inclusive. If yours is not listed and you don't know how to disable it, please ask.

    -----------------------------------------------------------


  • Close any open browsers.
  • WARNING: Combofix will disconnect your machine from the Internet as soon as it starts
  • Please do not attempt to re-connect your machine back to the Internet until Combofix has completely finished.
  • If there is no internet connection after running Combofix, then restart your computer to restore back your connection.

-----------------------------------------------------------

[*]Double click on combo-Fix.exe & follow the prompts.

[*]When finished, it will produce a report for you.

[*]Please post the C:\Combo-Fix.txt for further review.

**Note: Do not mouseclick combo-fix's window while it's running. That may cause it to stall**

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That's right! ;)

Last steps:

Step 1

* Go to start > run and copy and paste next command in the field:

ComboFix /uninstall

Make sure there's a space between Combofix and /

Then hit enter.

This will uninstall Combofix, delete its related folders and files, reset your clock settings, hide file extensions, hide the system/hidden files and resets System Restore again.

Step 2

To enable CD Emulation programs using DeFogger please perform these steps:

  1. Please download DeFogger to your desktop.
  2. Once downloaded, double-click on the DeFogger icon to start the tool.
  3. The application window will now appear. You should now click on the Enable button to enable your CD Emulation drivers
  4. When it prompts you whether or not you want to continue, please click on the Yes button to continue
  5. When the program has completed you will see a Finished! message. Click on the OK button to exit the program.
  6. If CD Emulation programs are present and have been enabled, DeFogger will now ask you to reboot the machine. Please allow it to do so by clicking on the OK button.

Step 3

Please manually delete Defogger, DDS and GMER.

Step 4

Please, uninstall the following applications:

  1. Adobe Reader 8
  2. Adobe Reader 8.2.2

You can read, how to this here:

Step 5

Please go into the Control Panel, Add/Remove and for now remove ALL versions of JAVA

Then run this tool to help cleanup any left over Java

Your Java is out of date. Older versions have vulnerabilities that malware can use to infect your system.

Please download JavaRa and unzip it to your desktop.

***Please close any instances of Internet Explorer (or other web browser) before continuing!***

  • Double-click on JavaRa.exe to start the program.
  • From the drop-down menu, choose English and click on Select.
  • JavaRa will open; click on Remove Older Versions to remove the older versions of Java installed on your computer.
  • Click Yes when prompted. When JavaRa is done, a notice will appear that a logfile has been produced. Click OK.
    Then look for the following Java folders and if found delete them.
    C:\Program Files\Java
    C:\Program Files\Common Files\Java
    C:\Windows\Sun
    C:\Documents and Settings\All Users\Application Data\Java
    C:\Documents and Settings\All Users\Application Data\Sun\Java
    C:\Documents and Settings\username\Application Data\Java
    C:\Documents and Settings\username\Application Data\Sun\Java

Step 6

Please download and install the latest version of Adobe Reader from:

www.adobe.com

About Java:

www.java.com/en

Step 7

Some malware preventions:

http://forums.malwarebytes.org/index.php?showtopic=9365

Safe surfing! :o

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I am running Vista. When I cut and paste the 'ComboFix /uninstall' into the search box behind the start button and hit return, I get the error message 'Windows cannot find 'Combo-Fix.exe'. Make sure you typed the name correctly, and then try again.'. This is weird as I can see the file Combo-Fix.exe on my desktop, and I can find it there in windows explorer. Combo-Fix does not appear in my Remove/Change programs under Control Panel.

Can you please advise as to how else I might get it to uninstall itself please?

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