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DNSchanger trojan


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#1 Verkadh

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Posted 01 July 2009 - 06:59 PM

So i've been working on this thing since last night. Tried about every scan in my arsenal including a payed for version of Vipre, no luck thus far : / I'm still returning occasional trojan results, and every time i reboot my static DNS info gets wiped out. I can switch to dhcp or assign it again, it's just becoming a pain in the ass more than anything. Any suggestions would be greatly appreciated.

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#2 Budapest

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Posted 01 July 2009 - 07:18 PM

Have you tried scanning with Malwarebytes?
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw

#3 Verkadh

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Posted 01 July 2009 - 07:28 PM

Both in and out of safemode. Each time it found at least one infection, though they always return after a reboot. (Sorry for the huge delay, connection dropped on me)

#4 Orange Blossom

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Posted 01 July 2009 - 07:29 PM

I am shifting this topic to the Am I Infected forum as trojans are still showing up in scans. ~ OB
Help us help you. If HelpBot replies, you MUST follow step 1 in its reply so we know you need help.

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#5 Budapest

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Posted 01 July 2009 - 07:33 PM

Can you please post the latest Malwarebytes log.
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw

#6 Verkadh

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Posted 01 July 2009 - 07:41 PM

Malwarebytes' Anti-Malware 1.38
Database version: 2297
Windows 5.1.2600 Service Pack 2

7/1/2009 7:09:29 PM
mbam-log-2009-07-01 (19-09-29).txt

Scan type: Quick Scan
Objects scanned: 94637
Time elapsed: 6 minute(s), 40 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 1
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:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\taskman (Backdoor.Bot) -> Quarantined and deleted successfully.

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)


The file itself related is actually located in C:\recylcers. Only problem is i'm having a hell of a time deleting it with cmd since its running, and malwarebytes never seems to actually get it.

Edited by Verkadh, 01 July 2009 - 07:44 PM.


#7 Budapest

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Posted 01 July 2009 - 07:43 PM

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)

The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw

#8 Verkadh

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Posted 02 July 2009 - 07:18 AM

SDFix.exe\SDFix\apps\Process.exe;C:\Documents and Settings\Administrator\Desktop\SDFix.exe;Tool.Prockill;;
SDFix.exe;C:\Documents and Settings\Administrator\Desktop;Archive contains infected objects;Moved.;
8F2ABEC4d01\SDFix\apps\Process.exe;C:\Documents and Settings\Matthew\Local Settings\Application Data\Mozilla\Firefox\Profiles\n8i8xhfp.default\Cache\8F2ABEC4d01;Tool.Prockill;;
8F2ABEC4d01;C:\Documents and Settings\Matthew\Local Settings\Application Data\Mozilla\Firefox\Profiles\n8i8xhfp.default\Cache;Archive contains infected objects;Moved.;


Scan took ages on a full drive...Didn't end up finding much though : /

#9 Verkadh

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Posted 02 July 2009 - 01:53 PM

Tried another scan and ended up with a rundll32.exe active in the C:\recycler directory. Though the scan didn't actualy delete it it seems. i'm sure manually doing it would work with the kill explorer method, though i'm not sure if it's the root of all my problems in the first place.

#10 Budapest

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Posted 02 July 2009 - 05:07 PM

If you know the problem file you can try deleting it with File ASSASSIN option in Malwarebytes under the More Tools tab.
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw

#11 Verkadh

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Posted 02 July 2009 - 10:11 PM

Got rid of it just with command prompt, just had to kill explorer and change attributes, though to be honest I don't know that it helped much... Scans are not catching anything now, but my DNS info still refuses to save.

#12 Budapest

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Posted 02 July 2009 - 11:40 PM

Log on as an administrator, go Start > Run and type: "cmd". In the window that appears type: "netsh winsock reset". When the program is finished, you will receive the message: "Successfully reset the Winsock Catalog. You must restart the machine in order to complete the reset." Close the command box and reboot your computer.

Go Start > Run > type: "cmd" In the window that appears type: "ipconfig /flushdns". Close the command box.

Go Start > Control Panel > Network Connections. Right click on your default connection, usually Local Area Connection or Dial-up Connection if you are using Dial-up, and and choose Properties. Double-click on the Internet Protocol (TCP/IP) item. Select the radio button that says "Obtain DNS servers automatically". Reboot. Warning: Some Internet Service Providers need specific DNS settings. You need to make sure that you know if such DNS settings are required before you make this change.
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw




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