Explorer.exe and regedit.exe seem to be infected

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Explorer.exe and regedit.exe seem to be infected

Post by mpj123 on 24th February 2010, 12:54 am

Hello there,

I recently received a computer from a friend`s parents and they were having trouble connecting to the internet with windows explorer 32 bit, as well as firefox. Windows 64 bit on the other hand worked.

They also mentioned that they have been sending spam messages with msn.

They also cannot connect to many automatic downloads from programs... which is a pain. For instance, their anti-virus cannot connect to their auto updater, spybot s&d, malwarebytes... etc.


I tried the easy first, seeing how they have an msn virus, I went ahead and googled myself some msn virus removal tool from

[You must be registered and logged in to see this link.]

The tool successfully detected the malware as explorer.exe and regedit.exe in the system32 folder,

The following is the output:
Found c:\windows\system32\explorer.exe ...unable to delete!
Found c:\windows\system32\regedit.exe ...unable to delete!

I then looked at the processes, found nothing of importance

I went ahead and downloaded spybot S&D with the include manual update, scanned... found a few trojans. Removed those successfully, rebooted, re-scanned and found nothing.

Explorer.exe, regedit.exe are still infected. As well as the internet connection.

I then ran Malwarebytes and AdAware SE without results as well. Is the msn virus remover accurate? Is there something I am missing?

here is the hijackthis log:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 18:50:44, on 2010-02-23
Platform: Windows Vista SP2 (WinNT 6.00.1906)
MSIE: Internet Explorer v8.00 (8.00.6001.18882)
Boot mode: Normal

Running processes:
C:\hp\support\hpsysdrv.exe
C:\Program Files (x86)\Avira\AntiVir Desktop\avgnt.exe
C:\hp\kbd\kbd.exe
C:\Users\User\Desktop\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = [You must be registered and logged in to see this link.]
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = [You must be registered and logged in to see this link.]
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = [You must be registered and logged in to see this link.]
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = [You must be registered and logged in to see this link.]
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = [You must be registered and logged in to see this link.]
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = [You must be registered and logged in to see this link.]
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = [You must be registered and logged in to see this link.]
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page = C:\Windows\SysWOW64\blank.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
F2 - REG:system.ini: UserInit=userinit.exe
O1 - Hosts: ::1 localhost
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files (x86)\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: Groove GFS Browser Helper - {72853161-30C5-4D22-B7F9-0BBC1D38A37E} - C:\Program Files (x86)\Microsoft Office\Office12\GrooveShellExtensions.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files (x86)\Java\jre1.6.0_01\bin\ssv.dll
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O4 - HKLM\..\Run: [hpsysdrv] c:\hp\support\hpsysdrv.exe
O4 - HKLM\..\Run: [KBD] C:\HP\KBD\KbdStub.EXE
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files (x86)\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [GrooveMonitor] "C:\Program Files (x86)\Microsoft Office\Office12\GrooveMonitor.exe"
O4 - HKLM\..\Run: [avgnt] "C:\Program Files (x86)\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKLM\..\RunOnce: [Malwarebytes' Anti-Malware] "C:\Program Files (x86)\Malwarebytes' Anti-Malware\mbamgui.exe" /install /silent
O4 - HKCU\..\Run: [ehTray.exe] C:\Windows\ehome\ehTray.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - [You must be registered and logged in to see this link.]
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files (x86)\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files (x86)\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra button: Send to OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~2\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: S&end to OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~2\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~2\MICROS~2\Office12\REFIEBAR.DLL
O10 - Broken Internet access because of LSP provider 'c:\program files (x86)\common files\pc tools\lsp\pctlsp.dll' missing
O13 - Gopher Prefix:
O18 - Protocol: grooveLocalGWS - {88FED34C-F0CA-4636-A375-3CB6248B04CD} - C:\Program Files (x86)\Microsoft Office\Office12\GrooveSystemServices.dll
O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\Windows\System32\alg.exe (file missing)
O23 - Service: Avira AntiVir Scheduler (AntiVirSchedulerService) - Avira GmbH - C:\Program Files (x86)\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira AntiVir Guard (AntiVirService) - Avira GmbH - C:\Program Files (x86)\Avira\AntiVir Desktop\avguard.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files (x86)\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: @keyiso.dll,-100 (KeyIso) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - c:\Program Files (x86)\Common Files\LightScribe\LSSrvc.exe
O23 - Service: @comres.dll,-2797 (MSDTC) - Unknown owner - C:\Windows\System32\msdtc.exe (file missing)
O23 - Service: @%SystemRoot%\System32\netlogon.dll,-102 (Netlogon) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: NVIDIA Display Driver Service (nvsvc) - Unknown owner - C:\Windows\system32\nvvsvc.exe (file missing)
O23 - Service: @%systemroot%\system32\psbase.dll,-300 (ProtectedStorage) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: @%systemroot%\system32\Locator.exe,-2 (RpcLocator) - Unknown owner - C:\Windows\system32\locator.exe (file missing)
O23 - Service: @%SystemRoot%\system32\samsrv.dll,-1 (SamSs) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: @%SystemRoot%\system32\SLsvc.exe,-101 (slsvc) - Unknown owner - C:\Windows\system32\SLsvc.exe (file missing)
O23 - Service: @%SystemRoot%\system32\snmptrap.exe,-3 (SNMPTRAP) - Unknown owner - C:\Windows\System32\snmptrap.exe (file missing)
O23 - Service: @%systemroot%\system32\spoolsv.exe,-1 (Spooler) - Unknown owner - C:\Windows\System32\spoolsv.exe (file missing)
O23 - Service: @%SystemRoot%\System32\TuneUpDefragService.exe,-1 (TuneUp.Defrag) - Unknown owner - C:\Windows\System32\TuneUpDefragService.exe (file missing)
O23 - Service: @%SystemRoot%\system32\ui0detect.exe,-101 (UI0Detect) - Unknown owner - C:\Windows\system32\UI0Detect.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vds.exe,-100 (vds) - Unknown owner - C:\Windows\System32\vds.exe (file missing)
O23 - Service: @%systemroot%\system32\vssvc.exe,-102 (VSS) - Unknown owner - C:\Windows\system32\vssvc.exe (file missing)
O23 - Service: @%Systemroot%\system32\wbem\wmiapsrv.exe,-110 (wmiApSrv) - Unknown owner - C:\Windows\system32\wbem\WmiApSrv.exe (file missing)
O23 - Service: @%ProgramFiles%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - C:\Program Files (x86)\Windows Media Player\wmpnetwk.exe (file missing)
O23 - Service: XAudioService - Unknown owner - C:\Windows\system32\DRIVERS\xaudio64.exe (file missing)
O23 - Service: Zune Wireless Configuration Service (ZuneWlanCfgSvc) - Unknown owner - c:\Windows\system32\ZuneWlanCfgSvc.exe (file missing)

--
End of file - 7048 bytes

mpj123
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Re: Explorer.exe and regedit.exe seem to be infected

Post by Dr Jay on 24th February 2010, 2:30 pm

Please download Malwarebytes Anti-Malware from [You must be registered and logged in to see this link.].
Alternate link: [You must be registered and logged in to see this link.].
(Note: if you already have the program installed, just follow the directions. No need to re-download or re-install!)

Double Click mbam-setup.exe to install the application.

(Note: if you already have the program installed, open Malwarebytes from the Start Menu or Desktop shortcut, click the Update tab, and click Check for Updates, before doing the scan as instructed below!)

  • Make sure a checkmark is placed next to Update Malwarebytes' Anti-Malware and Launch Malwarebytes Anti-Malware, then click Finish.
  • If an update is found, it will download and install the latest version.
  • Once the program has loaded, select "Perform Full Scan", then click Scan.
  • The scan may take some time to finish,so please be patient.
  • When the scan is complete, click OK, then Show Results to view the results.
  • Make sure that everything is checked, and click Remove Selected.
  • When disinfection is completed, a log will open in Notepad and you may be prompted to Restart. (See Extra Note)
  • Please save the log to a location you will remember.
  • The log is automatically saved by MBAM and can be viewed by clicking the Logs tab in MBAM.
  • Copy and paste the entire report in your next reply.

Extra Note:

If MBAM encounters a file that is difficult to remove,you will be presented with 1 of 2 prompts,click OK to either and let MBAM proceed with the disinfection process. If asked to restart the computer, please do so immediately.


Dr. Jay (DJ)


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Re: Explorer.exe and regedit.exe seem to be infected

Post by mpj123 on 24th February 2010, 8:16 pm

Thank you for the reply,

Unfortunately Malwarebytes was not able to pick up the virus/trojan, I decided to go ahead and re-installed the the system files for windows which fixed the problem instead of cleaning it, I think its a safer measure then cleaning the trojan...

The problem is now gone, thanks for the help.

mpj123
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Re: Explorer.exe and regedit.exe seem to be infected

Post by Dr Jay on 24th February 2010, 10:44 pm

ok <_<


Dr. Jay (DJ)


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