Ciao, è da qualche giorno che Antivir di Avira mi rileva il virus sopra in oggetto. Ho provato con una ricerca con Google ma non viene mai menzionato. Eccone una descrizione più dettagliata:

Tipo: File
Fonte: C:\System Volume Information\_restore{BC8BBD84-47C1-47FB-A6BB-867BAD9BFEBB}\RP7\A0000903.exe
Stato: Infetta
Oggetto in quarantena: 54bcfe06.qua
Ripristinato: NO
Upload effettuato in Avira: NO
Sistema operativo: Windows XP/VISTA Workstation/Windows 7
Motore di riLogfile of Trend Micro HijackThis v2.0.2
Scan saved at 15.28.05, on 22/11/2012
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.5730.0013)
Boot mode: Normal

Ieri ho fatto una scansione con Spybot (in modalità provvisoria) e l'altro ieri con Combofix ma il "parassita" è ancora li...!
Ho fatto poco fa una scansione con Hijackthis da cui emerge la presenza del troian proprio alla penultima riga del log. Ho poi rifatto di nuovo il log e non compare più...!!! Posto il penultimo log in cui era manifesto (Messaggio:TR/Dldr.Agent.266240.11) Cosa posso fare? Grazie.

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:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\Avira\AntiVir Desktop\sched.exe
C:\Programmi\Avira\AntiVir Desktop\avguard.exe
C:\Programmi\D-Link\DWA-140 revB\ANIWConnService.exe
C:\Programmi\Java\jre7\bin\jqs.exe
C:\Programmi\Sandboxie\SbieSvc.exe
C:\Programmi\Spyware Terminator\st_rsser.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\Western Digital\WD Drive Manager\WDDriveService.exe
C:\Programmi\Avira\AntiVir Desktop\avgnt.exe
C:\Programmi\Spyware Terminator\SpywareTerminatorShield.exe
C:\Programmi\Spyware Terminator\SpywareTerminatorUpdate.exe
C:\WINDOWS\vsnpstd.exe
C:\Programmi\File comuni\Java\Java Update\jusched.exe
C:\Programmi\D-Link\DWA-140 revB\AirNCFG.exe
C:\Programmi\D-Link\DWA-140 revB\WZCSLDR2.exe
C:\Programmi\Hamlet HDSL640S USB ADSL Modem\CnxDslTb.exe
C:\Programmi\File comuni\Ahead\Lib\NMBgMonitor.exe
C:\Programmi\Sandboxie\SbieCtrl.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\File comuni\Ahead\Lib\NMIndexStoreSvr.exe
C:\Programmi\Avira\AntiVir Desktop\avshadow.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\Sandboxie\SandboxieRpcSs.exe
C:\Programmi\Sandboxie\SandboxieDcomLaunch.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Programmi\aMSN\bin\wish.exe
C:\WINDOWS\system32\SNDVOL32.EXE
c:\programmi\avira\antivir desktop\avcenter.exe
C:\WINDOWS\system32\notepad.exe
C:\WINDOWS\system32\NOTEPAD.EXE
C:\Documents and Settings\xp\Desktop\Hijackthis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
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/?LinkId=69157
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://www.dediche.it/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Programmi\File comuni\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Groove GFS Browser Helper - {72853161-30C5-4D22-B7F9-0BBC1D38A37E} - C:\PROGRA~1\MICROS~2\Office12\GRA8E1~1.DLL
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre7\bin\ssv.dll
O2 - BHO: Guida per l'accesso a Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Programmi\Java\jre7\bin\jp2ssv.dll
O4 - HKLM\..\Run: [NeroFilterCheck] C:\Programmi\File comuni\Ahead\Lib\NeroCheck.exe
O4 - HKLM\..\Run: [avgnt] "C:\Programmi\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKLM\..\Run: [AdslTaskBar] rundll32.exe stmctrl.dll,TaskBar
O4 - HKLM\..\Run: [SpywareTerminatorShield] C:\Programmi\Spyware Terminator\SpywareTerminatorShield.exe
O4 - HKLM\..\Run: [SpywareTerminatorUpdater] C:\Programmi\Spyware Terminator\SpywareTerminatorUpdate.exe
O4 - HKLM\..\Run: [Adobe ARM] "C:\Programmi\File comuni\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [snpstd] C:\WINDOWS\vsnpstd.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programmi\File comuni\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [D-Link D-Link DWA-140] C:\Programmi\D-Link\DWA-140 revB\AirNCFG.exe
O4 - HKLM\..\Run: [D-Link DWA-140 WZCSLDR2] C:\Programmi\D-Link\DWA-140 revB\WZCSLDR2.exe
O4 - HKLM\..\Run: [CnxDslTaskBar] C:\Programmi\Hamlet HDSL640S USB ADSL Modem\CnxDslTb.exe
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Programmi\File comuni\Ahead\Lib\NMBgMonitor.exe"
O4 - HKCU\..\Run: [SandboxieControl] "C:\Programmi\Sandboxie\SbieCtrl.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\RunOnce: [_nltide_2] regsvr32 /s /n /i:U shell32 (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [_nltide_2] regsvr32 /s /n /i:U shell32 (User 'Default user')
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O9 - Extra button: Invia a OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: I&nvia a OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\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
O17 - HKLM\System\CCS\Services\Tcpip\..\{BB34E6F4-F46F-4E50-A3AB-0B73054FA999}: NameServer = 193.70.152.15 212.52.97.15
O18 - Protocol: grooveLocalGWS - {88FED34C-F0CA-4636-A375-3CB6248B04CD} - C:\PROGRA~1\MICROS~2\Office12\GR99D3~1.DLL
O23 - Service: Adobe Flash Player Update Service (AdobeFlashPlayerUpdateSvc) - Adobe Systems Incorporated - C:\WINDOWS\system32\Macromed\Flash\FlashPlayerUpdateService.exe
O23 - Service: Avira Pianificatore (AntiVirSchedulerService) - Avira Operations GmbH & Co. KG - C:\Programmi\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira Realtime Protection (AntiVirService) - Avira Operations GmbH & Co. KG - C:\Programmi\Avira\AntiVir Desktop\avguard.exe
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: D_Link_DWA-140 Service (D_Link_DWA-140) - Wireless Service - C:\Programmi\D-Link\DWA-140 revB\ANIWZCSdS.exe
O23 - Service: D_Link_DWA-140_WPS Service (D_Link_DWA-140_WPS) - Unknown owner - C:\Programmi\D-Link\DWA-140 revB\ANIWConnService.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Oracle Corporation - C:\Programmi\Java\jre7\bin\jqs.exe
O23 - Service: Mozilla Maintenance Service (MozillaMaintenance) - Mozilla Foundation - C:\Programmi\Mozilla Maintenance Service\maintenanceservice.exe
O23 - Service: NBService - Nero AG - C:\Programmi\Nero\Nero 7\Nero BackItUp\NBService.exe
O23 - Service: Sandboxie Service (SbieSvc) - tzuk - C:\Programmi\Sandboxie\SbieSvc.exe
O23 - Service: Spyware Terminator 2012 Realtime Shield Service (ST2012_Svc) - Crawler.com - C:\Programmi\Spyware Terminator\st_rsser.exe
O23 - Service: WD Drive Manager (WDDriveService) - Western Digital - C:\Programmi\Western Digital\WD Drive Manager\WDDriveService.exe

--
End of file - 7791 bytes
cerca: 8.02.10.202
File di definizione dei virus: 7.11.50.206
Messaggio: TR/Dldr.Agent.266240.11
Data/Ora: 21/11/2012, 23.49

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Disattiva il ripristino configurazione di sistema,
http://guide.aiutamici.com/guide?C1=7&C2=68&ID=80121
Riavvia il pc.
Riattiva il ripristino configurazione di sistema.
Probabilmente Avira non rileverà più niente.