Spyware indélogeable

Bonjour,

Le sujet à déjà été traité sur ce topic : " http://www.commentcamarche.net/forum/affich 3581256 trojandownloader xs besoin d aide svp#0 " mais ne voulant pas le déterrer, j'ai préféré reposter.

Donc, lors de l'exécution d'un programme téléchargé par p2p, je me suis vu infecté par un virus/spyware ou autre logiciel malveillant qui me créé pas mal de soucis, dont le blocage de mon gestionnaire de taches (même en exécutant gpedit.msc et en désactivant le blocage) et le remplacement de mon fond d'écran par un message sur fond bleu :

"Warning! Spyware threat has been detected on your PC.
Your computer has several fatal errors due to spyware activity.
It is strongly recommended to install an antispyware software to close all security vulnerabilities.
Antispyware software helps protect your PC against spyware and other security threats.
CLIC HERE TO SCAN YOUR PC FOR SPYWARE..."

Le lien me renvoi sur une page internet me proposant d'acheter des antispyware (bizarrement l'adresse est "about:security")
De plus plusieurs fenêtres s'ouvrent pour m'indiquer que je suis infecté et me donnant le nom du virus "Trojandownloader.XS", toute avec un lien me renvoyant sur la même page, ainsi que des bulles d'avertissement lancé depuis la barre de tâches avec encore un lien vers ce site...

Je vous mets un rapport de HijackThis :

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 15:18:45, on 02/04/2008
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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Intel\Intel Matrix Storage Manager\iaantmon.exe
C:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7DEBUG\mdm.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\SearchIndexer.exe
C:\WINDOWS\system32\mgmrwmrv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Intel\IntelDH\Intel(R) Quick Resume Technology\ELService.exe
C:\WINDOWS\ehome\ehtray.exe
C:\WINDOWS\RTHDCPL.EXE
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Intel\Intel Matrix Storage Manager\iaanotif.exe
C:\Program Files\HP DigitalMedia Archive\DMAScheduler.exe
C:\Program Files\HP\HP Software Update\HPwuSchd2.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\HP\KBD\KBD.EXE
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\Program Files\Java\jre1.6.0_05\bin\jusched.exe
C:\WINDOWS\system32\LVCOMSX.EXE
C:\WINDOWS\system32\rundll32.exe
C:\Program Files\Logitech\Video\LogiTray.exe
C:\PROGRA~1\Wanadoo\TaskbarIcon.exe
C:\WINDOWS\eHome\ehmsas.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
C:\Program Files\Wanadoo\EspaceWanadoo.exe
C:\Program Files\Logitech\Video\FxSvr2.exe
C:\Program Files\Wanadoo\ComComp.exe
C:\Program Files\Wanadoo\Watch.exe
c:\Program Files\HP\Digital Imaging\bin\hpqSTE08.exe
c:\windows\system\hpsysdrv.exe
C:\Program Files\Windows Live\Messenger\usnsvc.exe
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
C:\Program Files\Windows Media Player\wmplayer.exe
C:\Program Files\Adobe\Adobe Photoshop Lightroom 1.3\apdproxy.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WLLoginProxy.exe
C:\Program Files\RegCleaner\RegCleanr.exe
C:\Program Files\RegCleaner\RegCleanr.exe
C:\Program Files\RegCleaner\RegCleanr.exe
C:\Download\HiJackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr?cobrand=hp-desktop.msn.com&ocid=HPDHP&pc=HPDTDF
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = https://fr.search.yahoo.com/?fr=cb-hp06
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = https://www.orange.fr/portail
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = https://fr.search.yahoo.com/?fr=cb-hp06
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.fr/?gws_rd=ssl
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?ocid=iehp
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = https://fr.search.yahoo.com/?fr=cb-hp06
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr/?ocid=iehp
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = https://fr.search.yahoo.com/?fr=cb-hp06
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Wanadoo
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: Search Class - {08C06D61-F1F3-4799-86F8-BE1A89362C85} - C:\PROGRA~1\Wanadoo\SEARCH~1.DLL
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\userinit.exe,C:\WINDOWS\system32\mgmrwmrv.exe,
O2 - BHO: (no name) - {00000250-0320-4dd4-be4f-7566d2314352} - (no file)
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
O2 - BHO: (no name) - {13197ace-6851-45c3-a7ff-c281324d5489} - (no file)
O2 - BHO: (no name) - {15651c7c-e812-44a2-a9ac-b467a2233e7d} - (no file)
O2 - BHO: (no name) - {4e1075f4-eec4-4a86-add7-cd5f52858c31} - (no file)
O2 - BHO: (no name) - {4e7bd74f-2b8d-469e-92c6-ce7eb590a94d} - (no file)
O2 - BHO: (no name) - {5929cd6e-2062-44a4-b2c5-2c7e78fbab38} - (no file)
O2 - BHO: (no name) - {5dafd089-24b1-4c5e-bd42-8ca72550717b} - (no file)
O2 - BHO: (no name) - {5fa6752a-c4a0-4222-88c2-928ae5ab4966} - (no file)
O2 - BHO: (no name) - {622cc208-b014-4fe0-801b-874a5e5e403a} - (no file)
O2 - BHO: DealioBHO Class - {6A87B991-A31F-4130-AE72-6D0C294BF082} - C:\Program Files\Dealio\kb125\Dealio.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Alcohol Toolbar Helper - {8126A4A5-BFD3-46FE-BBDF-BFB5CF78E489} - C:\Program Files\Alcohol Toolbar\v3.2.0.0\Alcohol_Toolbar.dll
O2 - BHO: (no name) - {8674aea0-9d3d-11d9-99dc-00600f9a01f1} - (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: (no name) - {965a592f-8efa-4250-8630-7960230792f1} - (no file)
O2 - BHO: (no name) - {9c5b2f29-1f46-4639-a6b4-828942301d3e} - (no file)
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O2 - BHO: (no name) - {cf021f40-3e14-23a5-cba2-717765728274} - (no file)
O2 - BHO: SearchSettings Class - {E312764E-7706-43F1-8DAB-FCDD2B1E416D} - C:\Program Files\Search Settings\kb125\SearchSettings.dll
O2 - BHO: (no name) - {fc3a74e5-f281-4f10-ae1e-733078684f3c} - (no file)
O2 - BHO: (no name) - {ffff0001-0002-101a-a3c9-08002b2f49fb} - (no file)
O2 - BHO: (no name) - {FFFFFEF0-5B30-21D4-945D-000000000000} - C:\PROGRA~1\STARDO~1\SDIEInt.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O3 - Toolbar: Dealio - {E67C74F4-A00A-4F2C-9FEC-FD9DC004A67F} - C:\Program Files\Dealio\kb125\Dealio.dll
O3 - Toolbar: Alcohol Toolbar - {ED4BD629-C1B6-4399-8A34-02CCAA921DC9} - C:\Program Files\Alcohol Toolbar\v3.2.0.0\Alcohol_Toolbar.dll
O4 - HKLM\..\Run: [ehTray] C:\WINDOWS\ehome\ehtray.exe
O4 - HKLM\..\Run: [ftutil2] rundll32.exe ftutil2.dll,SetWriteCacheMode
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [IAAnotif] C:\Program Files\Intel\Intel Matrix Storage Manager\iaanotif.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /installquiet /keeploaded /nodetect
O4 - HKLM\..\Run: [HPHUPD08] c:\Program Files\HP\Digital Imaging\{33D6CC28-9F75-4d1b-A11D-98895B3A3729}\hphupd08.exe
O4 - HKLM\..\Run: [DMAScheduler] "c:\Program Files\HP DigitalMedia Archive\DMAScheduler.exe"
O4 - HKLM\..\Run: [Recguard] C:\WINDOWS\SMINST\RECGUARD.EXE
O4 - HKLM\..\Run: [HPBootOp] "C:\Program Files\Hewlett-Packard\HP Boot Optimizer\HPBootOp.exe" /run
O4 - HKLM\..\Run: [HP Software Update] C:\Program Files\HP\HP Software Update\HPwuSchd2.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [KBD] C:\HP\KBD\KBD.EXE
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_05\bin\jusched.exe"
O4 - HKLM\..\Run: [LVCOMSX] C:\WINDOWS\system32\LVCOMSX.EXE
O4 - HKLM\..\Run: [LogitechVideoRepair] C:\Program Files\Logitech\Video\ISStart.exe
O4 - HKLM\..\Run: [LogitechVideoTray] C:\Program Files\Logitech\Video\LogiTray.exe
O4 - HKLM\..\Run: [WOOWATCH] C:\PROGRA~1\Wanadoo\Watch.exe
O4 - HKLM\..\Run: [WOOTASKBARICON] C:\PROGRA~1\Wanadoo\TaskbarIcon.exe
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [Adobe Photo Downloader] "C:\Program Files\Adobe\Adobe Photoshop Lightroom 1.3\apdproxy.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [updateMgr] C:\Program Files\Adobe\Acrobat 7.0\Reader\AdobeUpdateManager.exe AcRdB7_0_5
O4 - HKCU\..\Run: [AlcoholAutomount] "C:\Program Files\Alcohol Soft\Alcohol 120\axcmd.exe" /automount
O4 - HKCU\..\Run: [LogitechSoftwareUpdate] "C:\Program Files\Logitech\Video\ManifestEngine.exe" boot
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe" /background
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - .DEFAULT User Startup: Pin.lnk = C:\hp\bin\CLOAKER.EXE (User 'Default user')
O4 - Startup: Espace Wanadoo.lnk = C:\Program Files\Wanadoo\EspaceWanadoo.exe
O4 - Startup: Raccourci vers msnmsgr.lnk = C:\Program Files\MSN Messenger\msnmsgr.exe
O4 - Startup: Windows Media Player.lnk = C:\Program Files\Windows Media Player\wmplayer.exe
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
O8 - Extra context menu item: &Traduire à partir de l'anglais - res://C:\Program Files\Google\GoogleToolbar1.dll/cmwordtrans.html
O8 - Extra context menu item: Compare Prices with &Dealio - C:\Documents and Settings\HP_Administrateur\Application Data\Dealio\kb125\res\DealioSearch.html
O8 - Extra context menu item: Download with Star Downloader - C:\Program Files\Star Downloader\sdie.htm
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~3\Office12\EXCEL.EXE/3000
O8 - Extra context menu item: Pages liées - res://C:\Program Files\Google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: Pages similaires - res://C:\Program Files\Google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: Recherche &Google - res://C:\Program Files\Google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: Version de la page actuelle disponible dans le cache Google - res://C:\Program Files\Google\GoogleToolbar1.dll/cmcache.html
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~3\Office12\REFIEBAR.DLL
O9 - Extra button: Aide à la connexion - {E2D4D26B-0180-43a4-B05F-462D6D54C789} - C:\WINDOWS\PCHEALTH\HELPCTR\Vendors\CN=Hewlett-Packard,L=Cupertino,S=Ca,C=US\IEButton\support.htm
O9 - Extra 'Tools' menuitem: Aide à la connexion - {E2D4D26B-0180-43a4-B05F-462D6D54C789} - C:\WINDOWS\PCHEALTH\HELPCTR\Vendors\CN=Hewlett-Packard,L=Cupertino,S=Ca,C=US\IEButton\support.htm
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: Dealio - {E908B145-C847-4e85-B315-07E2E70DECF8} - C:\Program Files\Dealio\kb125\Dealio.dll
O9 - Extra 'Tools' menuitem: Dealio - {E908B145-C847-4e85-B315-07E2E70DECF8} - C:\Program Files\Dealio\kb125\Dealio.dll
O9 - Extra button: Messager Wanadoo - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\PROGRA~1\WANADO~1\Wanadoo Messager.exe
O9 - Extra 'Tools' menuitem: Messager Wanadoo - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\PROGRA~1\WANADO~1\Wanadoo Messager.exe
O10 - Unknown file in Winsock LSP: c:\windows\system32\nwprovau.dll
O12 - Plugin for .spop: C:\Program Files\Internet Explorer\Plugins\NPDocBox.dll
O16 - DPF: {5C051655-FCD5-4969-9182-770EA5AA5565} (Solitaire Showdown Class) - http://messenger.zone.msn.com/binary/SolitaireShowdown.cab56986.cab
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O16 - DPF: {CF40ACC5-E1BB-4AFF-AC72-04C2F616BCA7} (get_atlcom Class) - http://www.adobe.com/products/acrobat/nos/gp.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{569336A3-A287-4ED3-B8B4-9FB6967000FC}: NameServer = 80.10.246.5 80.10.246.136
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: Symantec Event Manager (ccEvtMgr) - Unknown owner - c:\Program Files\Fichiers communs\Symantec Shared\ccEvtMgr.exe (file missing)
O23 - Service: Symantec Internet Security Password Validation (ccISPwdSvc) - Symantec Corporation - c:\Program Files\Norton Internet Security\ccPwdSvc.exe
O23 - Service: Symantec Network Proxy (ccProxy) - Unknown owner - c:\Program Files\Fichiers communs\Symantec Shared\ccProxy.exe (file missing)
O23 - Service: Symantec Settings Manager (ccSetMgr) - Unknown owner - c:\Program Files\Fichiers communs\Symantec Shared\ccSetMgr.exe (file missing)
O23 - Service: COM Host (comHost) - Unknown owner - c:\Program Files\Norton Internet Security\comHost.exe (file missing)
O23 - Service: Intel® Quick Resume Technology Drivers (ELService) - Intel Corporation - C:\Program Files\Intel\IntelDH\Intel(R) Quick Resume Technology\ELService.exe
O23 - Service: Intel(R) Matrix Storage Event Monitor (IAANTMon) - Intel Corporation - C:\Program Files\Intel\Intel Matrix Storage Manager\iaantmon.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
O23 - Service: Service Norton AntiVirus Auto-Protect (navapsvc) - Unknown owner - c:\Program Files\Norton Internet Security\Norton AntiVirus\navapsvc.exe (file missing)
O23 - Service: Norton Protection Center Service (NSCService) - Unknown owner - c:\Program Files\Fichiers communs\Symantec Shared\Security Console\NSCSRVCE.EXE (file missing)
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Symantec AVScan (SAVScan) - Unknown owner - c:\Program Files\Norton Internet Security\Norton AntiVirus\SAVScan.exe (file missing)
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Unknown owner - c:\Program Files\Fichiers communs\Symantec Shared\SNDSrvc.exe (file missing)
O23 - Service: Symantec SPBBCSvc (SPBBCSvc) - Unknown owner - c:\Program Files\Fichiers communs\Symantec Shared\SPBBC\SPBBCSvc.exe (file missing)
O23 - Service: Symantec Core LC - Unknown owner - C:\Program Files\Fichiers communs\Symantec Shared\CCPD-LC\symlcsvc.exe (file missing)