scvhost.exe infected with Win32:Istdnldr-AN [Trj]

Just had a virus warning from Avast saying "scvhost.exe" was infected with "Win32:Istdnldr-AN [Trj] ". I can post a HJK this log if needs be.

Is scvhost.exe quite an important file, it always seems to be running. What should i do, delete it, leave it...

Thanks

Alex

 

scvhost.exe is a virus.
svchost.exe is legitamate and you will have several of those processes.

Did Avast clean the infection? A HJT log wouldn't be a bad idea.

 

Thanks. I didn't see the difference. I deleted it.

Thanks

Alex

 

If you could just check over this anyway to make sure things are in tip top order i would be grateful.

Logfile of HijackThis v1.99.1
Scan saved at 23:03:12, on 06/07/2005
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Sygate\SPF\smc.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Common Files\AOL\ACS\AOLAcsd.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\system32\CTsvcCDA.exe
C:\Program Files\Intel\Intel Application Accelerator\iaantmon.exe
C:\Program Files\Common Files\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\System32\snmp.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Creative\SBAudigy2\Surround Mixer\CTSysVol.exe
C:\WINDOWS\system32\CTHELPER.EXE
C:\WINDOWS\system32\dla\tfswctrl.exe
C:\Program Files\Intel\Intel Application Accelerator\iaanotif.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Intel\Modem Event Monitor\IntelMEM.exe
C:\Program Files\Microsoft AntiSpyware\gcasServ.exe
C:\Program Files\ATI Technologies\ATI.ACE\cli.exe
C:\PROGRA~1\COMMON~1\AOL\AOLSPY~1\AOLSP Scheduler.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\ATI Technologies\ATI.ACE\CLI.exe
C:\Program Files\Microsoft AntiSpyware\gcasDtServ.exe
C:\Program Files\AOL 9.0\waol.exe
C:\Program Files\AOL 9.0\shellmon.exe
C:\Program Files\Common Files\AOL\aoltpspd.exe
C:\Program Files\ATI Technologies\ATI.ACE\cli.exe
C:\Program Files\Trillian\trillian.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Documents and Settings\Alex Law\My Documents\Hijackthis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.co.uk/
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: DriveLetterAccess - {5CA3D70E-1895-11CF-8E15-001234567890} - C:\WINDOWS\system32\dla\tfswshx.dll
O4 - HKLM\..\Run: [CTSysVol] C:\Program Files\Creative\SBAudigy2\Surround Mixer\CTSysVol.exe
O4 - HKLM\..\Run: [CTHelper] CTHELPER.EXE
O4 - HKLM\..\Run: [AsioReg] REGSVR32.EXE /S CTASIO.DLL
O4 - HKLM\..\Run: [dla] C:\WINDOWS\system32\dla\tfswctrl.exe
O4 - HKLM\..\Run: [IAAnotif] C:\Program Files\Intel\Intel Application Accelerator\iaanotif.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [ATIPTA] C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [IntelMeM] C:\Program Files\Intel\Modem Event Monitor\IntelMEM.exe
O4 - HKLM\..\Run: [SmcService] C:\PROGRA~1\Sygate\SPF\smc.exe -startgui
O4 - HKLM\..\Run: [gcasServ] "C:\Program Files\Microsoft AntiSpyware\gcasServ.exe "
O4 - HKLM\..\Run: [ATICCC] "C:\Program Files\ATI Technologies\ATI.ACE\cli.exe" runtime
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [AOL Spyware Protection] C:\PROGRA~1\COMMON~1\AOL\AOLSPY~1\AOLSP Scheduler.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - Global Startup: ATI CATALYST System Tray.lnk = C:\Program Files\ATI Technologies\ATI.ACE\CLI.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\j2re1.4.2_03\bin\npjpi142_03.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\j2re1.4.2_03\bin\npjpi142_03.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINDOWS\system32\Shdocvw.dll
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&clcid=0x409
O16 - DPF: {4A3CF76B-EC7A-405D-A67D-8DC6B52AB35B} (QDiagAOLCCUpdateObj Class) - http://aolcc.aolsvc.aol.co.uk/computercheckup/qdiagcc.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1118431071750
O17 - HKLM\System\CCS\Services\Tcpip\..\{48AF3AB1-213C-4315-AF4E-F6D8F932D424}: NameServer = 205.188.146.145
O23 - Service: AOL Connectivity Service (AOL ACS) - America Online, Inc. - C:\Program Files\Common Files\AOL\ACS\AOLAcsd.exe
O23 - Service: AOL Spyware Protection Service (AOLService) - Unknown owner - C:\PROGRA~1\COMMON~1\AOL\AOLSPY~1\\aolserv.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: avast! Antivirus - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: Creative Service for CDROM Access - Creative Technology Ltd - C:\WINDOWS\system32\CTsvcCDA.exe
O23 - Service: IAA Event Monitor (IAANTMon) - Intel Corporation - C:\Program Files\Intel\Intel Application Accelerator\iaantmon.exe
O23 - Service: Sygate Personal Firewall (SmcService) - Sygate Technologies, Inc. - C:\Program Files\Sygate\SPF\smc.exe

 

Your log looks clean to me.
Apparently you deleted the correct file, else you wouldn't be running now. The difference between the two is the spelling.

scvhost.exe is a virus.
svchost.exe is legitamate and you will have several of those processes.

That and folder location in other cases. Where C:\Windows\System32\Svchost.Exe is the correct file, while C:\Windows\Svchost.Exe is not, although spelled correctly in this case.