Trojaner-Board - svhost.exe unter x64 gefährlich?

Hallo zusammen,
hab da eine Frage bezüglich der Sicherheit meines Systems (Windows XP x64 SP2) und hoffe ihr könnt mir kurz Auskunft geben.
In meinem Systeme Volume Information tauchte neulich laut Antivir immer wieder Malware auf (WORM/IRCBo... + TR/Spyagent...). Habe die Systemwiederherstellung deaktiviert, alle Wiederherstellungspunkte gelöscht und wieder aktiviert. Seitdem ist Ruhe was die Meldungen angeht...
ABER: die unvorsichtige Zeit im Internetz hat natürlich Spuren hinterlassen, bin da insbesondere durch HJT auf einige svhost.exe Registryeinträge gestossen:

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Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 23:21:34, on 15.12.2008
Platform: Windows 2003 SP2 (WinNT 5.02.3790)
MSIE: Internet Explorer v6.00 SP1 (6.00.3790.1830)
Boot mode: Normal

Running processes:
C:\Program Files (x86)\Avira\AntiVir PersonalEdition Classic\sched.exe
C:\Program Files (x86)\ICQ6.5\ICQ.exe
C:\WINDOWS\SysWOW64\ctfmon.exe
C:\Program Files (x86)\Avira\AntiVir PersonalEdition Classic\avgnt.exe
C:\Program Files (x86)\Java\jre1.6.0_07\bin\jusched.exe
C:\Program Files (x86)\Avira\AntiVir PersonalEdition Classic\avguard.exe
C:\Program Files (x86)\Bonjour\mDNSResponder.exe
C:\Programme\Silvercrest MTS2118 driver\KMWDSrv.exe
C:\Programme\CDBurnerXP\NMSAccessU.exe
C:\Program Files (x86)\Java\jre1.6.0_07\bin\jucheck.exe
C:\Program Files (x86)\Mozilla Firefox\firefox.exe
C:\Program Files (x86)\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
F2 - REG:system.ini: UserInit=userinit
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files (x86)\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: Groove GFS Browser Helper - {72853161-30C5-4D22-B7F9-0BBC1D38A37E} - C:\PROGRA~3\MICROS~1\Office12\GRA8E1~1.DLL
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files (x86)\Java\jre1.6.0_07\bin\ssv.dll
O4 - HKLM\..\Run: [GEST] cQE
O4 - HKLM\..\Run: [avgnt] "C:\Program Files (x86)\Avira\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files (x86)\Java\jre1.6.0_07\bin\jusched.exe"
O4 - HKLM\..\Run: [StartCCC] "C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe" MSRun
O4 - HKLM\..\Run: [Supports RAS Connections] svhost.exe
O4 - HKLM\..\RunServices: [Supports RAS Connections] svhost.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Supports RAS Connections] svhost.exe
O4 - HKCU\..\Run: [ICQ] "C:\Program Files (x86)\ICQ6.5\ICQ.exe" silent
O4 - HKCU\..\RunServices: [Supports RAS Connections] svhost.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'LOKALER DIENST')
O4 - HKUS\S-1-5-19\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'LOKALER DIENST')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'NETZWERKDIENST')
O4 - HKUS\S-1-5-20\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'NETZWERKDIENST')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'Default user')
O8 - Extra context menu item: Append to existing PDF - res://C:\Programme\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convert link target to Adobe PDF - res://C:\Programme\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convert link target to existing PDF - res://C:\Programme\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convert selected links to Adobe PDF - res://C:\Programme\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECaptureSelLinks.html
O8 - Extra context menu item: Convert selected links to existing PDF - res://C:\Programme\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppendSelLinks.html
O8 - Extra context menu item: Convert selection to Adobe PDF - res://C:\Programme\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convert selection to existing PDF - res://C:\Programme\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convert to Adobe PDF - res://C:\Programme\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~3\MICROS~1\Office12\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files (x86)\Java\jre1.6.0_07\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Konsole - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files (x86)\Java\jre1.6.0_07\bin\ssv.dll
O9 - Extra button: An OneNote senden - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~3\MICROS~1\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: An OneNote s&enden - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~3\MICROS~1\Office12\ONBttnIE.dll
O9 - Extra button: Recherchieren - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~2\MI699F~1\OFFICE11\REFIEBAR.DLL
O9 - Extra button: ICQ6 - {E59EB121-F339-4851-A3BA-FE49C35617C2} - C:\Program Files (x86)\ICQ6.5\ICQ.exe
O9 - Extra 'Tools' menuitem: ICQ6 - {E59EB121-F339-4851-A3BA-FE49C35617C2} - C:\Program Files (x86)\ICQ6.5\ICQ.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: {9E214F45-89C2-4DE3-94A9-530EB1D05F7E} (QuestActiveX Class) - h**p://w**.quest3d.com/Quest3D_WebInstall.cab
O18 - Protocol: grooveLocalGWS - {88FED34C-F0CA-4636-A375-3CB6248B04CD} - C:\PROGRA~3\MICROS~1\Office12\GR99D3~1.DLL
O23 - Service: Avira AntiVir Personal – Free Antivirus Planer (AntiVirScheduler) - Avira GmbH - C:\Program Files (x86)\Avira\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: Avira AntiVir Personal – Free Antivirus Guard (AntiVirService) - Avira GmbH - C:\Program Files (x86)\Avira\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\system32\Ati2evxx.exe (file missing)
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2saag.exe
O23 - Service: Bonjour-Dienst (Bonjour Service) - Apple Inc. - C:\Program Files (x86)\Bonjour\mDNSResponder.exe
O23 - Service: Logical Disk Manager Administrative Service (dmadmin) - Unknown owner - C:\WINDOWS\System32\dmadmin.exe (file missing)
O23 - Service: Event Log (Eventlog) - Unknown owner - C:\WINDOWS\system32\services.exe (file missing)
O23 - Service: Firebird Server - MAGIX Instance (FirebirdServerMAGIXInstance) - MAGIX® - C:\Program Files (x86)\MAGIX\Common\Database\bin\fbserver.exe
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program Files (x86)\Common Files\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: HTTP SSL (HTTPFilter) - Unknown owner - C:\WINDOWS\System32\lsass.exe (file missing)
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files (x86)\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: IMAPI CD-Burning COM Service (ImapiService) - Unknown owner - C:\WINDOWS\system32\imapi.exe (file missing)
O23 - Service: iPod-Dienst (iPod Service) - Apple Inc. - C:\Program Files (x86)\iPod\bin\iPodService.exe
O23 - Service: Keyboard And Mouse Communication Service (KMWDSERVICE) - UASSOFT.COM - C:\Programme\Silvercrest MTS2118 driver\KMWDSrv.exe
O23 - Service: Distributed Transaction Coordinator (MSDTC) - Unknown owner - C:\WINDOWS\system32\msdtc.exe (file missing)
O23 - Service: Net Logon (Netlogon) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: NMSAccessU - Unknown owner - C:\Programme\CDBurnerXP\NMSAccessU.exe
O23 - Service: NT LM Security Support Provider (NtLmSsp) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: Plug and Play (PlugPlay) - Unknown owner - C:\WINDOWS\system32\services.exe (file missing)
O23 - Service: IPSEC Services (PolicyAgent) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: Protected Storage (ProtectedStorage) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: Remote Desktop Help Session Manager (RDSessMgr) - Unknown owner - C:\WINDOWS\system32\sessmgr.exe (file missing)
O23 - Service: Security Accounts Manager (SamSs) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: TabletService - Unknown owner - C:\WINDOWS\system32\Tablet.exe (file missing)
O23 - Service: Virtual Disk Service (vds) - Unknown owner - C:\WINDOWS\System32\vds.exe (file missing)
O23 - Service: Volume Shadow Copy (VSS) - Unknown owner - C:\WINDOWS\System32\vssvc.exe (file missing)
O23 - Service: WMI Performance Adapter (WmiApSrv) - Unknown owner - C:\WINDOWS\system32\wbem\wmiapsrv.exe (file missing)

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Den Registryeintrag svhost.exe - mit Sicherheit Malware - hab ich mal stehen lassen.
Jetzt die Frage: die entsprechenden Dateien kann ich nicht mehr auf meinem Rechner finden (Suche auch nach Systemdateien, Systemdateien sichtbar). Vielleicht sind sie bei meinem letzten Scan entfernt worden. Da waren sie wohl mit Sicherheit. Können die genannten Malwarevarianten (auch die oben genannten im Volume Information Ordner) auf meinem 64bit-System massiv Schaden angerichtet haben? Hab nur die Info gefunden, dass ich gegen Root-Kits wohl (noch) sicher sein soll.
Fällt euch noch "Unangenehmes" in meinem Logfile auf?

Dank im Voraus!
Lieben Gruß aus Kassel!
Pierre