Ciao a tutti, innanzitutto complimenti per il forum!
Avrei un problema da sottoporre, se possibile: in pratica, ho un trojan chiamato
Backdoor.SDBot.AA7485AD
che non riesco a rimuovere!
Il file infetto è
C:\WINDOWS\system32\dxdmain.exe ,
ma nella cartella System32 non c'è! Il mio antivirus (Avast 4.6) non lo individua, l'unico è stato BitDefender, che però non riesce a cancellarlo, e non mi parte in modalità provvisoria
Il sito della Symantec non parla esplicitamente di questo trojan, ma se ho capito bene è una variante del Backdoor.SDBot.AA.
Dal log di Hijackthis me pare di capire che il file dxdmain.exe si riferisce al DirectX Graphics, e mi è successa anche una cosa strana (che temo sia collegata): è scomparsa l'interfaccia Luna di XP! Cioè non è più disponibile
tra le proprietà dello schermo, posso solo selezionare l'interfaccia classica di Windows (che funziona meglio, ok, però...).
Mi permetto di approfittare del vostro tempo e postare il log di Hijackthis:
Logfile of HijackThis v1.99.1
Scan saved at 2.18.21, on 28/07/2005
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
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:\Programmi\Sygate\SPF\smc.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\Logitech\iTouch\iTouch.exe
C:\Programmi\Java\jre1.5.0_04\bin\jusched.exe
C:\Programmi\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\Programmi\Softwin\BitDefender Free Edition\bdmcon.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\Messenger\MSMSGS.EXE
C:\Programmi\Logitech\MouseWare\system\em_exec.exe
C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
C:\Programmi\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\System32\dxdmain.exe
C:\WINDOWS\system32\slserv.exe
C:\Programmi\File comuni\Softwin\BitDefender Communicator\xcommsvr.exe
C:\Programmi\File comuni\Softwin\BitDefender Scan Server\bdss.exe
C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe
C:\Programmi\Alwil Software\Avast4\ashWebSv.exe
C:\Programmi\TerraTec\DMX 6fire\DMX6Fire.exe
C:\WINDOWS\system32\wuauclt.exe
E:\Applicazioni utili\HijackThis\HijackThis.exe
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O4 - HKLM\..\Run: [zBrowser Launcher] C:\Programmi\Logitech\iTouch\iTouch.exe
O4 - HKLM\..\Run: [Logitech Utility] Logi_MwX.Exe
O4 - HKLM\..\Run: [SmcService] C:\PROGRA~1\Sygate\SPF\smc.exe -startgui
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programmi\Java\jre1.5.0_04\bin\jusched.exe
O4 - HKLM\..\Run: [ATIPTA] "C:\Programmi\ATI Technologies\ATI Control Panel\atiptaxx.exe"
O4 - HKLM\..\Run: [RoxioEngineUtility] "C:\Programmi\File comuni\Roxio Shared\System\EngUtil.exe"
O4 - HKLM\..\Run: [BDMCon] C:\Programmi\Softwin\BitDefender Free Edition\\bdmcon.exe
O4 - HKLM\..\Run: [BDNewsAgent] C:\Programmi\Softwin\BitDefender Free Edition\\bdnagent.exe
O4 - HKLM\..\Run: [UserFaultCheck] %systemroot%\system32\dumprep 0 -u
O4 - HKLM\..\Run: [KASP] "C:\Programmi\Kaspersky Lab\Kaspersky Security Suite\Kaspersky Anti-Spam Personal\OESpamTest.exe"
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\MSMSGS.EXE" /background
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O16 - DPF: {EF791A6B-FC12-4C68-99EF-FB9E207A39E6} (McFreeScan Class) - http://download.mcafee.com/molbin/iss-l ... cfscan.cab
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Programmi\Alwil Software\Avast4\aswUpdSv.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: avast! Antivirus - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: BitDefender Scan Server (bdss) - Unknown owner - C:\Programmi\File comuni\Softwin\BitDefender Scan Server\bdss.exe" /service (file missing)
O23 - Service: DirectX Graphics (dxdmain) - Unknown owner - C:\WINDOWS\System32\dxdmain.exe
O23 - Service: SmartLinkService (SLService) - - C:\WINDOWS\SYSTEM32\slserv.exe
O23 - Service: Sygate Personal Firewall (SmcService) - Sygate Technologies, Inc. - C:\Programmi\Sygate\SPF\smc.exe
O23 - Service: BitDefender Communicator (XCOMM) - Unknown owner - C:\Programmi\File comuni\Softwin\BitDefender Communicator\xcommsvr.exe" /service (file missing)
La stringa
O23 - Service: DirectX Graphics (dxdmain) - Unknown owner - C:\WINDOWS\System32\dxdmain.exe
non si fixa, al riavvio si ripresenta come prima!
Grazie in anticipo e scusate la prolissità!