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Trojan downloader problem


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#1 prodigalson

prodigalson

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Posted 01 May 2009 - 09:23 PM

So I've got a problem on my desktop. I'd been neglecting it, admittedly, using my laptop mostly, and not really checking for viruses and updates and such. So yesterday I got a virus on my desktop, ran a MalWareBytes scan, and got most everything off... but not quite. I've still got at least one problem. MalwareBytes refers to it as a "Trojan Downloader" and can't seem to remove it. I apologize for the lack of detailed info, but I'm not even sure what this is. I'll post a HJT and an MB log here, and I appreciate any help someone could give me. Thanks!



Malwarebytes' Anti-Malware 1.36
Database version: 2066
Windows 5.1.2600 Service Pack 2

5/1/2009 7:14:30 PM
mbam-log-2009-05-01 (19-14-30).txt

Scan type: Quick Scan
Objects scanned: 80227
Time elapsed: 58 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 1
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\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Downloader) -> Data: c:\windows\system32\userinit.exe -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)







Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 7:15:32 PM, on 5/1/2009
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\Program Files\CyberLink\Shared Files\RichVideo.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Viewpoint\Common\ViewpointService.exe
C:\Program Files\Linksys Wireless-G PCI Wireless Network Monitor\WLService.exe
C:\Program Files\Linksys Wireless-G PCI Wireless Network Monitor\WMP54Gv4.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\RTHDCPL.EXE
C:\Program Files\CyberLink\PowerDVD\PDVDServ.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Google\Gmail Notifier\gnotify.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Program Files\AIM6\aim6.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\DAEMON Tools Lite\daemon.exe
C:\Program Files\AIM6\aolsoftware.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\PROGRA~1\MOZILL~1\FIREFOX.EXE
C:\Program Files\iTunes\iTunes.exe
C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceHelper.exe
C:\Program Files\Common Files\Apple\Mobile Device Support\bin\distnoted.exe
C:\Program Files\Microsoft IntelliPoint\IPoint.exe
C:\WINDOWS\system32\rundll32.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.yahoo.com/
O2 - BHO: Java™ Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [SkyTel] SkyTel.EXE
O4 - HKLM\..\Run: [RemoteControl] "C:\Program Files\CyberLink\PowerDVD\PDVDServ.exe"
O4 - HKLM\..\Run: [LanguageShortcut] "C:\Program Files\CyberLink\PowerDVD\Language\Language.exe"
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [{0228e555-4f9c-4e35-a3ec-b109a192b4c2}] C:\Program Files\Google\Gmail Notifier\gnotify.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\RunOnce: [Malwarebytes Anti-Malware (reboot)] "C:\Program Files\Malwarebytes' Anti-Malware\mbam.exe" /runcleanupscript
O4 - HKCU\..\Run: [Aim6] "C:\Program Files\AIM6\aim6.exe" /d locale=en-US ee://aol/imApp
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [DAEMON Tools Lite] "C:\Program Files\DAEMON Tools Lite\daemon.exe" -autorun
O4 - HKCU\..\Run: [DL32] DL32
O4 - Startup: OneNote 2007 Screen Clipper and Launcher.lnk = C:\Program Files\Microsoft Office\Office12\ONENOTEM.EXE
O10 - Unknown file in Winsock LSP: c:\windows\system32\nwprovau.dll
O20 - AppInit_DLLs: cvsahn.dll
O23 - Service: Apple Mobile Device - Apple, Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: Bonjour Service - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: iPod Service - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Cyberlink RichVideo Service(CRVS) (RichVideo) - Unknown owner - C:\Program Files\CyberLink\Shared Files\RichVideo.exe
O23 - Service: Viewpoint Manager Service - Viewpoint Corporation - C:\Program Files\Viewpoint\Common\ViewpointService.exe
O23 - Service: WMP54Gv4SVC - GEMTEKS - C:\Program Files\Linksys Wireless-G PCI Wireless Network Monitor\WLService.exe

--
End of file - 4789 bytes

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#2 Maurice Naggar

Maurice Naggar

    Eradicator de malware


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Posted 16 May 2009 - 09:00 AM

Hello prodigalson:
The log does not show an antivirus program on the system :thumbup2:

and there's at minimum one suspect:

O20 - AppInit_DLLs: cvsahn.dll


For how long has this system been without an antivirus program?


If the system has been without an antivirus program, then see Malware Removal: When to Flatten and Reinstall Windows


If this has an installed antivirus program ( and by that I mean one installed well before the past 2 weeks and well before the infections showed up)..... then :

See and follow the steps at Preparation Guide For Use Before Using Hijackthis and other Malware Removal Tools, Instructions for receiving help in cleaning your computer
~Maurice Naggar
MS-MVP (Oct 2002 - Sept 2010)




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