Malware Pubs Rightcoupon / Installation d'un programme "bigfarm"

Bonjour,

Depuis un certain temps maintenant, à intervalles réguliers, un malware se réinstalle sur mon ordinateur. Les symptômes varient : soit j'ai tout à coup pleins de publicités "Rightcoupon" sur mon navigateur, soit un programme "Bigfarm" s'installe sur mon bureau, soit mon moteur de recherche change pour Luckysearch et ce genre de choses... A chaque fois malwarebytes et adwcleaner font disparaître tout cela, et puis quelques jours après, ça recommence. Je commence à désespérer !

Si quelqu'un a une solution ce serait merveilleux... Merci d'avance !

Voilà mon dernier rapport Hijack This :

Logfile of Trend Micro HijackThis v2.0.5
Scan saved at 17:14:41, on 29-05-17
Platform: Unknown Windows (WinNT 6.02.1008)
MSIE: Internet Explorer v11.0 (11.00.15063.0000)

FIREFOX: 53.0.3 (x86 fr)
Boot mode: Normal

Running processes:
C:\Program Files (x86)\Dell Update\DellUpTray.exe
C:\Program Files (x86)\CyberLink\CyberLink Media Suite\Power2Go8\CLMLSvc_P2G8.exe
C:\Program Files\Malwarebytes\Anti-Malware\mbamtray.exe
C:\Users\nora\AppData\Roaming\Spotify\SpotifyWebHelper.exe
C:\Users\nora\AppData\Local\Microsoft\OneDrive\OneDrive.exe
C:\Program Files (x86)\Dropbox\Client\Dropbox.exe
C:\Program Files (x86)\Adobe\Adobe Creative Cloud\ACC\Creative Cloud.exe
C:\Program Files (x86)\Dropbox\Client\Dropbox.exe
C:\Program Files (x86)\Dropbox\Client\Dropbox.exe
C:\Program Files (x86)\Common Files\Adobe\OOBE\PDApp\IPC\AdobeIPCBroker.exe
C:\Program Files (x86)\Common Files\Adobe\Adobe Desktop Common\ADS\Adobe Desktop Service.exe
C:\Program Files (x86)\Common Files\Adobe\Adobe Desktop Common\HEX\Adobe CEF Helper.exe
C:\Program Files (x86)\Adobe\Adobe Creative Cloud\CoreSync\CoreSync.exe
C:\Program Files (x86)\Adobe\Adobe Creative Cloud\CCXProcess\CCXProcess.exe
C:\Program Files (x86)\Adobe\Adobe Creative Cloud\CCXProcess\libs\node.exe
C:\Program Files (x86)\Common Files\Adobe\Adobe Desktop Common\HEX\Adobe CEF Helper.exe
C:\Program Files (x86)\Mozilla Firefox\firefox.exe
C:\Program Files (x86)\Mozilla Firefox\firefox.exe
C:\Program Files (x86)\Mozilla Firefox\firefox.exe
C:\Users\nora\Downloads\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/p/?LinkId=255141
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/p/?LinkId=255141
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page = C:\Windows\SysWOW64\blank.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
F2 - REG:system.ini: UserInit=
O2 - BHO: True Key Helper - {0F4B8786-5502-4803-8EBC-F652A1153BB6} - C:\Program Files\Intel Security\True Key\MSIE\truekey_ie.dll
O3 - Toolbar: True Key - {4BAAC1B8-0800-42C9-8FA6-08B211F356B8} - C:\Program Files\Intel Security\True Key\MSIE\truekey_ie.dll
O4 - HKLM\..\Run: [Dropbox] "C:\Program Files (x86)\Dropbox\Client\Dropbox.exe" /systemstartup
O4 - HKLM\..\Run: [Adobe Creative Cloud] "C:\Program Files (x86)\Adobe\Adobe Creative Cloud\ACC\Creative Cloud.exe" --showwindow=false --onOSstartup=true
O4 - HKCU\..\Run: [Spotify Web Helper] "C:\Users\nora\AppData\Roaming\Spotify\SpotifyWebHelper.exe"
O4 - HKCU\..\Run: [OneDrive] "C:\Users\nora\AppData\Local\Microsoft\OneDrive\OneDrive.exe" /background
O4 - HKCU\..\Run: [CCleaner Monitoring] "C:\Program Files\CCleaner\CCleaner64.exe" /MONITOR
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O15 - Trusted Zone: *.netflix.com
O18 - Protocol: tbauth - {14654CA6-5711-491D-B89A-58E571679951} - C:\Windows\SysWOW64\tbauth.dll
O18 - Protocol: windows.tbauth - {14654CA6-5711-491D-B89A-58E571679951} - C:\Windows\SysWOW64\tbauth.dll
O23 - Service: Adobe Acrobat Update Service (AdobeARMservice) - Adobe Systems Incorporated - C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\armsvc.exe
O23 - Service: Adobe Flash Player Update Service (AdobeFlashPlayerUpdateSvc) - Adobe Systems Incorporated - C:\WINDOWS\SysWOW64\Macromed\Flash\FlashPlayerUpdateService.exe
O23 - Service: AdobeUpdateService - Adobe Systems Incorporated - C:\Program Files (x86)\Common Files\Adobe\Adobe Desktop Common\ElevationManager\AdobeUpdateService.exe
O23 - Service: Adobe Genuine Software Integrity Service (AGSService) - Adobe Systems, Incorporated - C:\Program Files (x86)\Common Files\Adobe\AdobeGCClient\AGSService.exe
O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\WINDOWS\System32\alg.exe (file missing)
O23 - Service: Apple Mobile Device Service - Apple Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\AppleMobileDeviceService.exe
O23 - Service: Service Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Intel(R) Content Protection HECI Service (cphs) - Intel Corporation - C:\WINDOWS\SysWow64\IntelCpHeciSvc.exe
O23 - Service: Service Mise à jour Dropbox (dbupdate) (dbupdate) - Dropbox, Inc. - C:\Program Files (x86)\Dropbox\Update\DropboxUpdate.exe
O23 - Service: Service Mise à jour Dropbox (dbupdatem) (dbupdatem) - Dropbox, Inc. - C:\Program Files (x86)\Dropbox\Update\DropboxUpdate.exe
O23 - Service: DbxSvc - Unknown owner - C:\WINDOWS\system32\DbxSvc.exe (file missing)
O23 - Service: Dell Customer Connect - Dell Inc. - C:\Program Files (x86)\Dell Customer Connect\DCCService.exe
O23 - Service: Dell Foundation Services - Dell - C:\Program Files\Dell\Dell Foundation Services\DFSSvc.exe
O23 - Service: Dell Data Vault (DellDataVault) - Dell Inc. - C:\Program Files\Dell\DellDataVault\DellDataVault.exe
O23 - Service: Dell Digital Delivery Service (DellDigitalDelivery) - Dell Products, LP. - c:\Program Files (x86)\Dell Digital Delivery\DeliveryService.exe
O23 - Service: Dell Product Registration Manager (DellProdRegManager) - Aviata, Inc. - C:\Program Files (x86)\Dell Product Registration\regmgrsvc.exe
O23 - Service: Dell Update Service (DellUpdate) - Dell Inc. - C:\Program Files (x86)\Dell Update\DellUpService.exe
O23 - Service: @%SystemRoot%\system32\DiagSvcs\DiagnosticsHub.StandardCollector.ServiceRes.dll,-1000 (diagnosticshub.standardcollector.service) - Unknown owner - C:\WINDOWS\system32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exe (file missing)
O23 - Service: @%SystemRoot%\system32\efssvc.dll,-100 (EFS) - Unknown owner - C:\WINDOWS\System32\lsass.exe (file missing)
O23 - Service: Intel(R) PROSet/Wireless Event Log (EvtEng) - Intel(R) Corporation - C:\Program Files\Intel\WiFi\bin\EvtEng.exe
O23 - Service: @%systemroot%\system32\fxsresm.dll,-118 (Fax) - Unknown owner - C:\WINDOWS\system32\fxssvc.exe (file missing)
O23 - Service: HuaweiHiSuiteService64.exe - Unknown owner - C:\Program Files (x86)\HiSuite\HandSetService\HuaweiHiSuiteService64.exe
O23 - Service: @oem144.inf,%SERVICE_NAME%;Intel Bluetooth Service (ibtsiva) - Unknown owner - C:\WINDOWS\system32\ibtsiva (file missing)
O23 - Service: Intel(R) HD Graphics Control Panel Service (igfxCUIService2.0.0.0) - Unknown owner - C:\WINDOWS\system32\igfxCUIService.exe (file missing)
O23 - Service: Intel(R) Capability Licensing Service TCP IP Interface - Intel(R) Corporation - C:\Program Files\Intel\iCLS Client\SocketHeciServer.exe
O23 - Service: IntelUSBoverIP - Intel - C:\Program Files\Intel Corporation\USB over IP\bin\UoipService.exe
O23 - Service: Service de l’iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Intel(R) Update Manager (iumsvc) - Intel Corporation - C:\Program Files (x86)\Intel\Intel(R) Update Manager\bin\iumsvc.exe
O23 - Service: Intel(R) Dynamic Application Loader Host Interface Service (jhi_service) - Intel Corporation - C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL\jhi_service.exe
O23 - Service: @keyiso.dll,-100 (KeyIso) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: Intel(R) Management and Security Application Local Management Service (LMS) - Intel Corporation - C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\LMS\LMS.exe
O23 - Service: Malwarebytes Service (MBAMService) - Malwarebytes - C:\Program Files\Malwarebytes\Anti-Malware\mbamservice.exe
O23 - Service: Mozilla Maintenance Service (MozillaMaintenance) - Mozilla Foundation - C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
O23 - Service: @comres.dll,-2797 (MSDTC) - Unknown owner - C:\WINDOWS\System32\msdtc.exe (file missing)
O23 - Service: Wireless PAN DHCP Server (MyWiFiDHCPDNS) - Unknown owner - C:\Program Files\Intel\WiFi\bin\PanDhcpDns.exe
O23 - Service: @%SystemRoot%\System32\netlogon.dll,-102 (Netlogon) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: Intel(R) PROSet/Wireless Registry Service (RegSrvc) - Intel(R) Corporation - C:\Program Files\Common Files\Intel\WirelessCommon\RegSrvc.exe
O23 - Service: Cyberlink RichVideo Service(CRVS) (RichVideo) - Unknown owner - C:\Program Files (x86)\CyberLink\Shared files\RichVideo.exe
O23 - Service: @%systemroot%\system32\Locator.exe,-2 (RpcLocator) - Unknown owner - C:\WINDOWS\system32\locator.exe (file missing)
O23 - Service: Realtek Audio Service (RtkAudioService) - Realtek Semiconductor - C:\Program Files\Realtek\Audio\HDA\RtkAudioService64.exe
O23 - Service: @%SystemRoot%\system32\samsrv.dll,-1 (SamSs) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: @%systemroot%\system32\SecurityHealthAgent.dll,-1002 (SecurityHealthService) - Unknown owner - C:\WINDOWS\system32\SecurityHealthService.exe (file missing)
O23 - Service: @%SystemRoot%\system32\SensorDataService.exe,-101 (SensorDataService) - Unknown owner - C:\WINDOWS\System32\SensorDataService.exe (file missing)
O23 - Service: SoftThinks Agent Service (SftService) - SoftThinks SAS - C:\Program Files (x86)\Dell Backup and Recovery\sftservice.exe
O23 - Service: Skype Updater (SkypeUpdate) - Skype Technologies - C:\Program Files (x86)\Skype\Updater\Updater.exe
O23 - Service: @%SystemRoot%\system32\snmptrap.exe,-3 (SNMPTRAP) - Unknown owner - C:\WINDOWS\System32\snmptrap.exe (file missing)
O23 - Service: @%systemroot%\system32\spectrum.exe,-101 (spectrum) - Unknown owner - C:\WINDOWS\system32\spectrum.exe (file missing)
O23 - Service: @%systemroot%\system32\spoolsv.exe,-1 (Spooler) - Unknown owner - C:\WINDOWS\System32\spoolsv.exe (file missing)
O23 - Service: @%SystemRoot%\system32\sppsvc.exe,-101 (sppsvc) - Unknown owner - C:\WINDOWS\system32\sppsvc.exe (file missing)
O23 - Service: Dell SupportAssist Agent (SupportAssistAgent) - Dell Inc. - C:\Program Files (x86)\Dell\SupportAssistAgent\bin\SupportAssistAgent.exe
O23 - Service: @%SystemRoot%\system32\TieringEngineService.exe,-702 (TieringEngineService) - Unknown owner - C:\WINDOWS\system32\TieringEngineService.exe (file missing)
O23 - Service: Intel Security True Key (TrueKey) - McAfee, Inc. - C:\Program Files\TrueKey\McAfee.TrueKey.Service.exe
O23 - Service: Intel Security True Key Scheduler (TrueKeyScheduler) - Unknown owner - C:\Program Files\TrueKey\McTkSchedulerService.exe
O23 - Service: Intel Security True Key Helper Service (TrueKeyServiceHelper) - McAfee, Inc. - C:\Program Files\TrueKey\McAfee.TrueKey.ServiceHelper.exe
O23 - Service: @%SystemRoot%\system32\ui0detect.exe,-101 (UI0Detect) - Unknown owner - C:\WINDOWS\system32\UI0Detect.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vaultsvc.dll,-1003 (VaultSvc) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vds.exe,-100 (vds) - Unknown owner - C:\WINDOWS\System32\vds.exe (file missing)
O23 - Service: @%systemroot%\system32\vssvc.exe,-102 (VSS) - Unknown owner - C:\WINDOWS\system32\vssvc.exe (file missing)
O23 - Service: Waves Audio Services (WavesSysSvc) - Waves Audio Ltd. - C:\Program Files\Waves\MaxxAudio\WavesSysSvc64.exe
O23 - Service: @%systemroot%\system32\wbengine.exe,-104 (wbengine) - Unknown owner - C:\WINDOWS\system32\wbengine.exe (file missing)
O23 - Service: @%ProgramFiles%\Windows Defender\MpAsDesc.dll,-320 (WdNisSvc) - Unknown owner - C:\Program Files (x86)\Windows Defender\NisSrv.exe (file missing)
O23 - Service: @%ProgramFiles%\Windows Defender\MpAsDesc.dll,-310 (WinDefend) - Unknown owner - C:\Program Files (x86)\Windows Defender\MsMpEng.exe (file missing)
O23 - Service: @%Systemroot%\system32\wbem\wmiapsrv.exe,-110 (wmiApSrv) - Unknown owner - C:\WINDOWS\system32\wbem\WmiApSrv.exe (file missing)
O23 - Service: @%PROGRAMFILES%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - C:\Program Files (x86)\Windows Media Player\wmpnetwk.exe (file missing)
O23 - Service: Intel(R) PROSet/Wireless Zero Configuration Service (ZeroConfigService) - Intel® Corporation - C:\Program Files\Intel\WiFi\bin\ZeroConfigService.exe