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userinit.exe Infected with Trojan.Agent


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I have today been called to a machine in our office riddled with spyware and a couple of virus, i've got down now to just 2 that I am unable to clear. These are both being reported by Malwarebytes as:

Registry Data Items Infected:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: c:\windows\system32\userinit.exe -> No action taken.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: system32\userinit.exe -> No action taken.

I can clear / quarentine etc and reboot and they re-appear. I've included a copy below of the HijackThis log, doesn't appear to reference the userinit.exe at all, could this be a false positive?

Any help would be gratefully received.

Logfile of Trend Micro HijackThis v2.0.2

Scan saved at 13:55:48, on 15/01/2009

Platform: Windows XP SP2 (WinNT 5.01.2600)

MSIE: Internet Explorer v6.00 SP3 (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:\Program Files\Windows Defender\MsMpEng.exe

C:\WINDOWS\System32\svchost.exe

C:\WINDOWS\System32\brsvc01a.exe

C:\WINDOWS\System32\brss01a.exe

C:\WINDOWS\system32\spoolsv.exe

C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe

C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe

C:\Program Files\Java\jre6\bin\jqs.exe

C:\WINDOWS\Explorer.EXE

C:\WINDOWS\system32\RunDll32.exe

C:\WINDOWS\system32\pctspk.exe

C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe

C:\Program Files\Adobe\Photoshop Album Starter Edition\3.0\Apps\apdproxy.exe

C:\Program Files\Windows Defender\MSASCui.exe

C:\Program Files\Java\jre6\bin\jusched.exe

C:\Program Files\Messenger\msmsgs.exe

C:\WINDOWS\System32\svchost.exe

C:\WINDOWS\System32\svchost.exe

C:\WINDOWS\system32\wuauclt.exe

C:\WINDOWS\system32\wuauclt.exe

C:\WINDOWS\SoftwareDistribution\Download\dd9ab5193501484cf5e6884fa1d22f9e\update\update.exe

C:\Program Files\Internet Explorer\iexplore.exe

C:\Documents and Settings\Jill\Desktop\Nick\HijackThis.exe

O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll

O2 - BHO: Java Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre6\bin\ssv.dll

O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar2.dll

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

O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar2.dll

O4 - HKLM\..\Run: [Cmaudio] RunDll32 cmicnfg.cpl,CMICtrlWnd

O4 - HKLM\..\Run: [PCTVOICE] pctspk.exe

O4 - HKLM\..\Run: [siS KHooker] C:\WINDOWS\System32\khooker.exe

O4 - HKLM\..\Run: [siSUSBRG] C:\WINDOWS\sisUSBrg.exe

O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe /STARTUP

O4 - HKLM\..\Run: [Adobe Photo Downloader] "C:\Program Files\Adobe\Photoshop Album Starter Edition\3.0\Apps\apdproxy.exe"

O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"

O4 - HKLM\..\Run: [Windows Defender] "C:\Program Files\Windows Defender\MSASCui.exe" -hide

O4 - HKLM\..\Run: [sunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"

O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background

O4 - HKCU\..\RunOnce: [TSClientMSIUninstaller] cmd.exe /C "cscript %systemroot%\Installer\TSClientMsiTrans\tscuinst.vbs"

O4 - HKCU\..\RunOnce: [TSClientAXDisabler] cmd.exe /C "%systemroot%\Installer\TSClientMsiTrans\tscdsbl.bat"

O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'LOCAL SERVICE')

O4 - HKUS\S-1-5-19\..\Run: [AVG7_Run] C:\PROGRA~1\Grisoft\AVGFRE~1\avgw.exe /RUNONCE (User 'LOCAL SERVICE')

O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'NETWORK SERVICE')

O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SYSTEM')

O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'Default user')

O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE

O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000

O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe

O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe

O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe

O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe

O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204

O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/...b?1159365784093

O16 - DPF: {8AD9C840-044E-11D1-B3E9-00805F499D93} (Java Runtime Environment 1.6.0) - http://javadl.sun.com/webapps/download/AutoDL?BundleId=26688

O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe

O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe

O23 - Service: BrSplService (Brother XP spl Service) - brother Industries Ltd - C:\WINDOWS\System32\brsvc01a.exe

O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe

O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe

--

End of file - 5414 bytes

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For this problem, do an analyse with pandasoftware scan online, if it detect your infection download the version panda antivirus tryout and scan your computer complete, it will delete your infection...

when it finish restart your computer and reanalyse with panda or malwarebyte for control and see.

Enjoy

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  • Root Admin

Hello and Welcome to Malwarebytes

A couple of things.

1. This type of infection hides from most scanners and anti-virus so a HJT log often won't see it.

2. Malwarebytes is not FREE for business use which you appear to be using it as.

You should purchase a Technician License to use it on multiple machines, otherwise your in violation of the End User License Agreement.

Currently no single product that I'm aware of can fully clean the system from this, and it will take a couple of tools and scans to fix it.

Please send an email to helpdesk@malwarebytes.org and they can assist you further with licensing and cleanup.

Thank you.

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