Infection possible / Norton HS

Bonjour,
J'avais deja eu quelques problemes il y a environ 2 semaines (cf http://www.commentcamarche.net/forum/affich 5799565 possible infection) Tout semblait etre resolu mais apparemment c'est reparti ^^
A l'allumage du Pc et apres l'ouverture de ma session Norton m'indique qu'il a bloqué "Trojan Horse", en affichant les détails il semble "W32.IRCBot" le coupable. le fichier infecté serait "c:\windows\system32\windowslivecare.exe"
J'ai analysé tout le dossier avec Antivir et il ne trouve rien ...
Norton ne fonctinne plus correctement : impossible de mettre a jour les definitions, impossible de lancer une analyse, certaines options on été modifié et ne sont plus changeable (du genre analyser courrier entrant/sortant etc).
Voila un log de hiJackthis pour les adeptes ^^ :
#######################################################################
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 13:28:28, on 18/04/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16608)
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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccSvcHst.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Fichiers communs\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\Symantec\LiveUpdate\AluSchedulerSvc.exe
C:\WINDOWS\system32\bgsvcgen.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\WINDOWS\system32\drivers\CDAC11BA.EXE
C:\WINDOWS\system32\DRIVERS\CDANTSRV.EXE
C:\Program Files\Fichiers communs\InterVideo\DeviceService\DevSvc.exe
C:\Program Files\FileZilla Server\FileZilla Server.exe
C:\Program Files\Norton SystemWorks\Norton GoBack\GBPoll.exe
C:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\lxdeserv.exe
C:\WINDOWS\system32\lxdecoms.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\system32\PnkBstrA.exe
C:\Program Files\Fichiers communs\Roxio Shared\10.0\SharedCOM\RoxWatch10.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Fichiers communs\Ulead Systems\DVD\ULCDRSvr.exe
C:\Program Files\Fichiers communs\Roxio Shared\10.0\SharedCOM\RoxMediaDB10.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccSvcHst.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\WINDOWS\system32\WindowsLiveCare.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe
C:\Documents and Settings\Bapt\Mes documents\Logiciels\eMule\emule.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\Program Files\Windows Live\Messenger\usnsvc.exe
C:\Program Files\Opera\Opera.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccLgView.exe
C:\Documents and Settings\Bapt\Bureau\Optimisation\Nettoyage\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: Yahoo! Toolbar avec bloqueur de fenêtres pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn0\yt.dll
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Program Files\Yahoo!\Companion\Installs\cpn0\yt.dll
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelper.dll (file missing)
O2 - BHO: Lexmark Barre d'outils - {1017A80C-6F09-4548-A84D-EDD6AC9525F0} - C:\Program Files\Lexmark Toolbar\toolband.dll
O2 - BHO: Skype add-on (mastermind) - {22BF413B-C6D2-4d91-82A9-A0F997BA588C} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O2 - BHO: AddTask Class - {24F06550-65E3-4D1C-8CFE-839C296B5530} - C:\Program Files\eREAD6.0\IEeREAD.dll
O2 - BHO: Winamp Toolbar BHO - {25CEE8EC-5730-41bc-8B58-22DDC8AB8C20} - C:\Program Files\Winamp Toolbar\winamptb.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: NCO 2.0 IE BHO - {602ADB0E-4AFF-4217-8AA1-95DAC4DFA408} - C:\Program Files\Fichiers communs\Symantec Shared\coShared\Browser\2.0\coIEPlg.dll
O2 - BHO: AddTask Class - {6A19C29D-ED45-4483-8999-9F939C8161F2} - C:\Program Files\eREAD6.0\WebHook.dll
O2 - BHO: Symantec Intrusion Prevention - {6D53EC84-6AAE-4787-AEEE-F4628F01010C} - C:\PROGRA~1\FICHIE~1\SYMANT~1\IDS\IPSBHO.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Programme d'aide de l'Assistant de connexion Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\2.0.301.7164\swg.dll
O3 - Toolbar: Copernic Agent - {F2E259E8-0FC8-438C-A6E0-342DD80FA53E} - C:\PROGRA~1\COPERN~1\COPERN~1.DLL
O3 - Toolbar: Copernic Desktop Search - {C5F7A735-70F1-477F-8C36-6FF3C736017B} - C:\Program Files\Copernic Desktop Search\CopernicDesktopSearchIntegration974.dll
O3 - Toolbar: Yahoo! Toolbar avec bloqueur de fenêtres pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn0\yt.dll
O3 - Toolbar: Lexmark Barre d'outils - {1017A80C-6F09-4548-A84D-EDD6AC9525F0} - C:\Program Files\Lexmark Toolbar\toolband.dll
O3 - Toolbar: Afficher Norton Toolbar - {7FEBEFE3-6B19-4349-98D2-FFB09D4B49CA} - C:\Program Files\Fichiers communs\Symantec Shared\coShared\Browser\2.0\CoIEPlg.dll
O3 - Toolbar: &Save Flash - {4064EA35-578D-4073-A834-C96D82CBCF40} - C:\Program Files\Save Flash\SaveFlash.dll
O3 - Toolbar: Winamp Toolbar - {EBF2BA02-9094-4c5a-858B-BB198F3D8DE2} - C:\Program Files\Winamp Toolbar\winamptb.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [osCheck] "C:\Program Files\Norton Internet Security\osCheck.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [Kernel and Hardware Abstraction Layer] KHALMNPR.EXE
O4 - HKLM\..\Run: [UpdatePPShortCut] "C:\Program Files\CyberLink\PowerProducer\MUITransfer\MUIStartMenu.exe" "C:\Program Files\CyberLink\PowerProducer" update "Software\CyberLink\PowerProducer\5.0"
O4 - HKLM\..\Run: [NBKeyScan] "C:\Program Files\Nero\Nero8\Nero BackItUp\NBKeyScan.exe"
O4 - HKLM\..\Run: [Windows Live Care.exe] WindowsLiveCare.exe
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKLM\..\RunServices: [DRam prosessor] msconfig.exe
O4 - HKLM\..\RunServices: [Windows Live Care.exe] WindowsLiveCare.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe" /background
O4 - Startup: start.bat
O4 - Startup: Startup Defender.lnk = C:\Program Files\Zards software\Startup Defender\Startup Defender.exe
O4 - Global Startup: Logitech SetPoint.lnk = C:\Program Files\Logitech\SetPoint\SetPoint.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Restrictions present
O8 - Extra context menu item: &Winamp Toolbar Search - C:\Documents and Settings\All Users\Application Data\Winamp Toolbar\ieToolbar\resources\en-US\local\search.html
O8 - Extra context menu item: Choisir comme avatar pour &Messenger - C:\Program Files\MSN Pictures Displayer\AddIEPicture.htm
O8 - Extra context menu item: E&xporter vers 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\jre1.6.0_03\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra button: (no name) - {193B17B0-7C9F-4D5B-AEAB-8D3605EFC084} - C:\PROGRA~1\COPERN~1\COPERN~1.EXE
O9 - Extra 'Tools' menuitem: Démarrer Copernic Agent - {193B17B0-7C9F-4D5B-AEAB-8D3605EFC084} - C:\PROGRA~1\COPERN~1\COPERN~1.EXE
O9 - Extra button: Run WinHTTrack - {36ECAF82-3300-8F84-092E-AFF36D6C7040} - C:\WINDOWS\system32\shdocvw.dll
O9 - Extra 'Tools' menuitem: Launch WinHTTrack - {36ECAF82-3300-8F84-092E-AFF36D6C7040} - C:\WINDOWS\system32\shdocvw.dll
O9 - Extra button: Express Cleanup - {5E638779-1818-4754-A595-EF1C63B87A56} - C:\Program Files\Norton SystemWorks\Norton Cleanup\WCQuick.lnk
O9 - Extra 'Tools' menuitem: Express Cleanup - {5E638779-1818-4754-A595-EF1C63B87A56} - C:\Program Files\Norton SystemWorks\Norton Cleanup\WCQuick.lnk
O9 - Extra button: Copernic Agent - {688DC797-DC11-46A7-9F1B-445F4F58CE6E} - C:\PROGRA~1\COPERN~1\COPERN~1.EXE
O9 - Extra button: Skype - {77BF5300-1474-4EC7-9980-D32B190E9B07} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
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
O10 - Unknown file in Winsock LSP: c:\windows\system32\nwprovau.dll
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://download.microsoft.com/download/E/5/6/E5611B10-0D6D-4117-8430-A67417AA88CD/LegitCheckControl.cab
O16 - DPF: {44990301-3C9D-426D-81DF-AAB636FA4345} (Symantec Script Runner Class) - https://support.norton.com/sp/en/us/home/current/info
O16 - DPF: {6A344D34-5231-452A-8A57-D064AC9B7862} (Symantec Download Manager) - https://webdl.symantec.com/activex/symdlmgr.cab
O16 - DPF: {6E5E167B-1566-4316-B27F-0DDAB3484CF7} (Image Uploader Control) - http://www.photoservice.com/aurigma/ImageUploader4.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{2FB09744-8592-4666-A237-122DFEA55DD7}: NameServer = 192.168.0.1
O17 - HKLM\System\CS1\Services\Tcpip\..\{2FB09744-8592-4666-A237-122DFEA55DD7}: NameServer = 192.168.0.1
O17 - HKLM\System\CS2\Services\Tcpip\..\{2FB09744-8592-4666-A237-122DFEA55DD7}: NameServer = 192.168.0.1
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FICHIE~1\Skype\SKYPE4~1.DLL
O23 - Service: Ad-Aware 2007 Service (aawservice) - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
O23 - Service: AntiVir PersonalEdition Classic Scheduler (AntiVirScheduler) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: AntiVir PersonalEdition Classic Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Apple Mobile Device - Apple, Inc. - C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.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: Automatic LiveUpdate Scheduler - Symantec Corporation - C:\Program Files\Symantec\LiveUpdate\AluSchedulerSvc.exe
O23 - Service: B's Recorder GOLD Library General Service (bgsvcgen) - B.H.A Corporation - C:\WINDOWS\system32\bgsvcgen.exe
O23 - Service: ##Id_String1.6844F930_1628_4223_B5CC_5BB94B879762## (Bonjour Service) - Apple Computer, Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: C-DillaCdaC11BA - Macrovision - C:\WINDOWS\system32\drivers\CDAC11BA.EXE
O23 - Service: C-DillaSrv - C-Dilla Ltd - C:\WINDOWS\system32\DRIVERS\CDANTSRV.EXE
O23 - Service: Capture Device Service - InterVideo Inc. - C:\Program Files\Fichiers communs\InterVideo\DeviceService\DevSvc.exe
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccSvcHst.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccSvcHst.exe
O23 - Service: Symantec Lic NetConnect service (CLTNetCnService) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccSvcHst.exe
O23 - Service: COM Host (comHost) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\VAScanner\comHost.exe
O23 - Service: FileZilla Server FTP server (FileZilla Server) - FileZilla Project - C:\Program Files\FileZilla Server\FileZilla Server.exe
O23 - Service: Firebird Server - MAGIX Instance (FirebirdServerMAGIXInstance) - MAGIX® - C:\Program Files\MAGIX\Common\Database\bin\fbserver.exe
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program Files\Fichiers communs\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: GoBack Polling Service (GBPoll) - Symantec Corporation - C:\Program Files\Norton SystemWorks\Norton GoBack\GBPoll.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Service de l'iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Logitech Bluetooth Service (LBTServ) - Logitech, Inc. - C:\Program Files\Fichiers communs\Logishrd\Bluetooth\LBTServ.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
O23 - Service: LiveUpdate - Symantec Corporation - C:\Program Files\Symantec\LiveUpdate\LuComServer_3_4.EXE
O23 - Service: LiveUpdate Notice - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccSvcHst.exe
O23 - Service: lmab_device - Unknown owner - C:\WINDOWS\system32\LMabcoms.exe
O23 - Service: lxdeCATSCustConnectService - Lexmark International, Inc. - C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\\lxdeserv.exe
O23 - Service: lxde_device - - C:\WINDOWS\system32\lxdecoms.exe
O23 - Service: Nero BackItUp Scheduler 3 - Unknown owner - C:\Program Files\Nero\Nero8\Nero BackItUp\NBService.exe (file missing)
O23 - Service: NMIndexingService - Unknown owner - C:\Program Files\Fichiers communs\Nero\Lib\NMIndexingService.exe (file missing)
O23 - Service: Planificateur LiveUpdate automatique - Symantec Corporation - C:\Program Files\Symantec\LiveUpdate\ALUSchedulerSvc.exe
O23 - Service: PnkBstrA - Unknown owner - C:\WINDOWS\system32\PnkBstrA.exe
O23 - Service: Roxio UPnP Renderer 10 - Sonic Solutions - C:\Program Files\Roxio\Digital Home 10\RoxioUPnPRenderer10.exe
O23 - Service: Roxio Upnp Server 10 - Sonic Solutions - C:\Program Files\Roxio\Digital Home 10\RoxioUpnpService10.exe
O23 - Service: LiveShare P2P Server 10 (RoxLiveShare10) - Sonic Solutions - C:\Program Files\Fichiers communs\Roxio Shared\10.0\SharedCOM\RoxLiveShare10.exe
O23 - Service: LiveShare P2P Server 9 (RoxLiveShare9) - Unknown owner - C:\Program Files\Fichiers communs\Roxio Shared\9.0\SharedCOM\RoxLiveShare9.exe (file missing)
O23 - Service: RoxMediaDB10 - Sonic Solutions - C:\Program Files\Fichiers communs\Roxio Shared\10.0\SharedCOM\RoxMediaDB10.exe
O23 - Service: Roxio Hard Drive Watcher 10 (RoxWatch10) - Sonic Solutions - C:\Program Files\Fichiers communs\Roxio Shared\10.0\SharedCOM\RoxWatch10.exe
O23 - Service: ServiceLayer - Nokia. - C:\Program Files\PC Connectivity Solution\ServiceLayer.exe
O23 - Service: SessionLauncher - Unknown owner - C:\DOCUME~1\UTILIS~1\LOCALS~1\Temp\DX9\SessionLauncher.exe (file missing)
O23 - Service: StarOpen - Avira GmbH - (no file)
O23 - Service: stllssvr - Unknown owner - C:\Program Files\Fichiers communs\SureThing Shared\stllssvr.exe (file missing)
O23 - Service: Symantec Core LC - Unknown owner - C:\Program Files\Fichiers communs\Symantec Shared\CCPD-LC\symlcsvc.exe
O23 - Service: Ulead Burning Helper (UleadBurningHelper) - Ulead Systems, Inc. - C:\Program Files\Fichiers communs\Ulead Systems\DVD\ULCDRSvr.exe
O23 - Service: wampapache - Apache Software Foundation - C:\Program Files\wamp\apache2\bin\httpd.exe
O23 - Service: wampmysqld - Unknown owner - C:\Program Files\wamp\mysql\bin\mysqld-nt.exe