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DNSchanger.o infection


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#1 kmcq

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Posted 23 June 2009 - 09:20 PM

My computer is infected with the Trojan listed above. It exhibits the typical symptoms (browsers redirect to malicious sites).

It is not detected by Malwarebytes or by SuperAntiSpyware. Infected files were quarantined by McAfee but not removed. I've run McAfee with system restore disabled, but the problem persists. I've run RootRepeal, which identified the hidden driver and ~15 hidden files, mostly in the windows temp and system32 folders. (all the infected files have "SKYNET" in them I think.

Oh, I should also say that I am unable to boot in safe mode. Presumably also related to the infection.

What do I do to remove the files/infection?

Edited by kmcq, 23 June 2009 - 10:35 PM.


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#2 quietman7

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Posted 24 June 2009 - 10:48 AM

Please post the results of rootrepeal.txt.
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#3 kmcq

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Posted 26 June 2009 - 08:20 PM

ROOTREPEAL © AD, 2007-2009
==================================================
Scan Time: 2009/06/26 19:27
Program Version: Version 1.3.0.0
Windows Version: Windows XP SP2
==================================================

Drivers
-------------------
Name: dump_nvatabus.sys
Image Path: C:\WINDOWS\System32\Drivers\dump_nvatabus.sys
Address: 0xEB214000 Size: 94208 File Visible: No Signed: -
Status: -

Name: dump_WMILIB.SYS
Image Path: C:\WINDOWS\System32\Drivers\dump_WMILIB.SYS
Address: 0xEB623000 Size: 8192 File Visible: No Signed: -
Status: -

Name: rootrepeal.sys
Image Path: C:\WINDOWS\system32\drivers\rootrepeal.sys
Address: 0xB83D2000 Size: 49152 File Visible: No Signed: -
Status: -

Name: SKYNETbabuthxd.sys
Image Path: C:\WINDOWS\system32\drivers\SKYNETbabuthxd.sys
Address: 0xF084D000 Size: 163840 File Visible: - Signed: -
Status: Hidden from Windows API!

Hidden/Locked Files
-------------------
Path: C:\Documents and Settings\Kyle\Cookies\kyle@collective-media[1].txt
Status: Visible to the Windows API, but not on disk.

Path: C:\Documents and Settings\Kyle\Cookies\kyle@goal.adbureau[2].txt
Status: Visible to the Windows API, but not on disk.

Path: C:\Documents and Settings\Kyle\Cookies\kyle@goal[1].txt
Status: Visible to the Windows API, but not on disk.

Path: c:\documents and settings\localservice\application data\sacore\cache\da39a3ee5e6b4b0d3255bfef95601890afd80709\.subcache
Status: Size mismatch (API: 470, Raw: 400)

Path: C:\Documents and Settings\LocalService\Application Data\SACore\Cache\DA39A3EE5E6B4B0D3255BFEF95601890AFD80709\E225FF0C5C8D45871996FB96DC44D803181AC32D
Status: Visible to the Windows API, but not on disk.

Path: C:\Documents and Settings\LocalService\Application Data\SACore\Cache\DA39A3EE5E6B4B0D3255BFEF95601890AFD80709\E69D6EB3CC750E7BED4623D5F4411386D0B78DF6
Status: Visible to the Windows API, but not on disk.

Stealth Objects
-------------------
Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: winlogon.exe (PID: 892) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: services.exe (PID: 940) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: lsass.exe (PID: 952) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETqwmqekxy.dll]
Process: svchost.exe (PID: 1100) Address: 0x008d0000 Size: 57344

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: svchost.exe (PID: 1100) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: svchost.exe (PID: 1180) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: MsMpEng.exe (PID: 1276) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: svchost.exe (PID: 1336) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: svchost.exe (PID: 1468) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: svchost.exe (PID: 1664) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: Explorer.EXE (PID: 1828) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: spoolsv.exe (PID: 1976) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: svchost.exe (PID: 164) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: AppleMobileDeviceService.exe (PID: 212) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: mDNSResponder.exe (PID: 224) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: McSACore.exe (PID: 408) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: mcmscsvc.exe (PID: 496) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: mcnasvc.exe (PID: 540) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: mcproxy.exe (PID: 632) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: mcshield.exe (PID: 808) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: SOUNDMAN.EXE (PID: 836) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: mdm.exe (PID: 1112) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: type32.exe (PID: 1248) Address: 0x009c0000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: point32.exe (PID: 1260) Address: 0x00a90000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: CMGrdian.exe (PID: 1268) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: RUNDLL32.EXE (PID: 1384) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: hpztsb04.exe (PID: 1440) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: DIGServices.exe (PID: 1004) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: jusched.exe (PID: 1588) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: MSASCui.exe (PID: 1632) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: BJMyPrt.exe (PID: 1704) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: mcagent.exe (PID: 1720) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: MPFSrv.exe (PID: 1760) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: V0500Mon.exe (PID: 1560) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: Acrotray.exe (PID: 1864) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: QTTask.exe (PID: 1928) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: iTunesHelper.exe (PID: 2140) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: RuLaunch.exe (PID: 2156) Address: 0x00a30000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: ctfmon.exe (PID: 2200) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: GoogleToolbarNotifier.exe (PID: 2248) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: gStart.exe (PID: 2260) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: AWC.exe (PID: 2340) Address: 0x011e0000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: SUPERAntiSpyware.exe (PID: 2376) Address: 0x04c50000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: nvsvc32.exe (PID: 2476) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: GammaTray.exe (PID: 2484) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: PnkBstrA.exe (PID: 2568) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: NaturalColorLoad.exe (PID: 2596) Address: 0x00930000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: WZQKPICK.EXE (PID: 2608) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: PnkBstrB.exe (PID: 2676) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: RioMSC.exe (PID: 2744) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: svchost.exe (PID: 2828) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: iPodService.exe (PID: 3228) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: FNPLicensingService.exe (PID: 3332) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: alg.exe (PID: 3464) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: mcsysmon.exe (PID: 2184) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: iexplore.exe (PID: 1756) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: Center.exe (PID: 3136) Address: 0x003f0000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: RootRepeal.exe (PID: 3232) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: wuauclt.exe (PID: 4804) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: NOTEPAD.EXE (PID: 5992) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: mcods.exe (PID: 5872) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: mcvsshld.exe (PID: 6088) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: iexplore.exe (PID: 516) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: wuauclt.exe (PID: 152) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: wmiprvse.exe (PID: 4920) Address: 0x10000000 Size: 32768

Object: Hidden Module [Name: SKYNETvbvpiavn.dll]
Process: MpCmdRun.exe (PID: 5664) Address: 0x10000000 Size: 32768

Object: Hidden Code [Driver: prodrv06Ѕ䵃慖Ёఅ䵃꾵ຓ, IRP_MJ_CREATE]
Process: System Address: 0xe1bde3f8 Size: 1474

Object: Hidden Code [Driver: prodrv06Ѕ䵃慖Ёఅ䵃꾵ຓ, IRP_MJ_CLOSE]
Process: System Address: 0xe1bde3f8 Size: 1474

Object: Hidden Code [Driver: prodrv06Ѕ䵃慖Ёఅ䵃꾵ຓ, IRP_MJ_DEVICE_CONTROL]
Process: System Address: 0xe1bde3f8 Size: 1474

Object: Hidden Code [Driver: prohlp02, IRP_MJ_CREATE]
Process: System Address: 0xe101fc50 Size: 944

Object: Hidden Code [Driver: prohlp02, IRP_MJ_CLOSE]
Process: System Address: 0xe101fc50 Size: 944

Object: Hidden Code [Driver: prohlp02, IRP_MJ_DEVICE_CONTROL]
Process: System Address: 0xe101fc50 Size: 944

Hidden Services
-------------------
Service Name: SKYNETbirwafyq
Image Path: C:\WINDOWS\system32\drivers\SKYNETbabuthxd.sys

==EOF==

Edited by kmcq, 26 June 2009 - 08:38 PM.


#4 kmcq

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Posted 26 June 2009 - 08:58 PM

...and today's McAfee scan found and removed NTOSKRNL-HOOK

it found, but could not remove DNSchanger.ad files in the windows temp folder

#5 quietman7

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Posted 27 June 2009 - 06:12 AM

It appears you edited your last report and inserted a different log from the one I received in my notification email as the two are different.

Double-click on RootRepeal.exe to rerun it again.
  • Click on the Files tab, then click the Scan button.
  • In the Select Drives, dialog Please select drives to scan: select all drives showing, then click OK.
  • When the scan has completed, a list of files will be generated in the RootRepeal window.
  • Use your mouse to highlight the following files:
    C:\WINDOWS\system32\drivers\SKYNETbabuthxd.sys
    C:\WINDOWS\system32\SKYNETvbvpiavn.dll
  • Right-click on those files and then click the Wipe File option only.
  • Exit RootRepeal and immediately restart the computer.
Please download TFC by Old Timer and save it to your desktop.
alternate download link
  • Save any unsaved work. TFC will close ALL open programs including your browser!
  • Double-click on TFC.exe to run it. If you are using Vista, right-click on the file and choose Run As Administrator.
  • Click the Start button to begin the cleaning process and let it run uninterrupted to completion.
  • Important! If TFC prompts you to reboot, please do so immediately. If not prompted, manually reboot the machine anyway to ensure a complete clean.

...and today's McAfee scan found and removed NTOSKRNL-HOOK

NTOSKRNL-HOOK is a vendor specific name for the above rootkit. Reboot in safe mode and repeat your scan.

Your infection is related to a nasty variant of the TDSSSERV rootkit component.

Rootkits, backdoor Trojans, Botnets, and IRCBots are very dangerous because they compromise system integrity by making changes that allow it to by used by the attacker for malicious purposes. Rootkits are used by Trojans to conceal its presence (hide from view) in order to prevent detection of an attacker's software and make removal more difficult. Many rootkits can hook into the Windows 32-bit kernel, and patch several APIs to hide new registry keys and files they install. They can disable your anti-virus and security tools to prevent detection and removal. Remote attackers use backdoors as a means of accessing and taking control of a computer that bypasses security mechanisms. This type of exploit allows them to steal sensitive information like passwords, personal and financial data which is send back to the hacker. To learn more about these types of infections, you can refer to:If your computer was used for online banking, has credit card information or other sensitive data on it, you should disconnect from the Internet until your system is fully cleaned. 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 and change each password using a clean computer, not the infected one. If not, an attacker may get the new passwords and transaction information. If using a router, you need to reset it with a strong logon/password so the malware cannot gain control again. Banking and credit card institutions should be notified of the possible security breach. Because your computer was compromised please read:Although the rootkit was identified and may be 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 the computer is secure even if the malware appears to have been removed. In some instances an infection may have caused so much damage to your system that it cannot be completely cleaned or repaired so you can never be sure that you have completely removed a rootkit. The malware may leave so many remnants behind that security tools cannot find them. Tools that claim to be able to remove rootkits cannot guarantee that all traces of it will be removed. 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:

Edited by quietman7, 27 June 2009 - 06:17 AM.

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#6 kmcq

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Posted 27 June 2009 - 12:58 PM

Perhaps I should just wipe and reinstall the OS.

Is it safe for me to back up some recent files, or does this put me at risk for reinfecting after the reinstall?

#7 quietman7

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Posted 27 June 2009 - 03:52 PM

Your decision as to what action to take should be made by reading and asking yourself the questions presented in the "When should I re-format?" and What Do I Do? links previously provided. As I already said, in some instance the malware may leave so many remnants behind that security tools cannot find them and your system cannot be completely cleaned, repaired or trusted. Reinstalling Windows without first wiping the entire hard drive with a repartition/reformat will not remove the infection. The reinstall will only overwrite the Windows files. Any malware on the system will still be there afterwards. Starting over by reformatting, and performing a clean install of the OS or doing a factory restore with a vendor-specific Recovery Disk or Recovery Partition removes everything and is the safest action but I cannot make that decision for you.

Reformatting a hard disk deletes all data. Should you decide to reformat, you can back up all your important documents, personal data files, photos to a CD or DVD drive, not a flash drive or external hard drive as they may become compromised in the process. The safest practice is not to backup any executable files (*.exe), screensavers (*.scr), autorun (.ini) or script files (.php, .asp, and .html) files because they may be infected by malware. Avoid backing up compressed files (.zip, .cab, .rar) that have executable files inside them as some types of malware can penetrate and infect .exe files within compressed files too. Other types of malware may even disguise itself by adding and hiding its extension to the existing extension of file(s) so be sure you look closely at the full file name. After reformatting, scan the backed up data with your anti-virus prior to to copying it back to your hard drive.

Should you decide to reformat and you're not sure how to do that or need help, please review:These links include step-by-step instructions with screenshots:Vista users can refer to these instructions:Don't forget you will have to go to Microsoft Update and apply all Windows security patches after reformatting.

If you need additional assistance with reformatting or have questions about multiple hard drives, you can start a new topic in the Windows XP Home and Professional forum. If you don't get a reply, please send me a PM and I will get someone to take a look.

Edited by quietman7, 27 June 2009 - 03:55 PM.

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