Backdoor.IRCBot.ul come debellarlo definitivamente?

[brutusin]

come posso debellare in maniera definitiva questo maledetto Backdoor.IRCBot.ul ?
navigo normalmente ma ad un certo punto la navigazione viene bloccata e il firewall (BlackICE) individua attacchi TCP SYN FLOOD ... questi attacchi mi erano già capitati e avevo debellato il tutto grazie ad una discussione del forum
Questa volta invece ho notato che con ewido anty spyware una volta messo in quarantina Backdoor.IRCBot.ul il sistema ricomincia a funzionare tranquillamente salvo poi ripiantarsi quando Backdoor.IRCBot.ul si insinua nuovamente !
come posso interrompere questa cosa ?
ho fatto anche l'UPDATE di W2K

[LUCASS]

Ciao,posta un log di Hijackthis,ciao

[brutusin]

questo è stato fatto dopo aver pulito tutto e senza mai essere tornato in internet

Logfile of HijackThis v1.99.1
Scan saved at 18.25.38, on 30/09/2006
Platform: Windows 2000 SP4 (WinNT 5.00.2195)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:\WINNT\System32\smss.exe
C:\WINNT\system32\winlogon.exe
C:\WINNT\system32\services.exe
C:\WINNT\system32\lsass.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\system32\spoolsv.exe
C:\WINNT\System32\Ati2evxx.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
C:\Programmi\Network ICE\BlackICE\blackd.exe
C:\WINNT\System32\svchost.exe
C:\Programmi\ewido anti-spyware 4.0\guard.exe
C:\Programmi\File comuni\Microsoft Shared\VS7Debug\mdm.exe
C:\mysql\bin\mysqld-nt.exe
C:\WINNT\system32\regsvc.exe
C:\WINNT\system32\MSTask.exe
C:\WINNT\system32\slserv.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\WINNT\System32\mspmspsv.exe
C:\WINNT\system32\svchost.exe
C:\Programmi\Bonjour\mDNSResponder.exe
C:\WINNT\System32\inetsrv\inetinfo.exe
C:\WINNT\Explorer.EXE
C:\WINNT\system32\atiptaxx.exe
C:\Programmi\iTunes\iTunesHelper.exe
C:\Programmi\QuickTime\qttask.exe
C:\Programmi\Java\jre1.5.0_06\bin\jusched.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe
C:\WINNT\system32\internat.exe
C:\Programmi\Google\GoogleToolbarNotifier\1.0.720. 3640\GoogleToolbarNotifier.exe
C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
C:\Programmi\Network ICE\BlackICE\blackice.exe
C:\mysql\bin\winmysqladmin.exe
C:\Programmi\iPod\bin\iPodService.exe
C:\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.gustoinrete.com/
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
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre1.5.0_06\bin\ssv.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programmi\google\googletoolbar1.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINNT\System32\msdxm.ocx
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programmi\google\googletoolbar1.dll
O4 - HKLM\..\Run: [Synchronization Manager] mobsync.exe /logon
O4 - HKLM\..\Run: [ATIModeChange] Ati2mdxx.exe
O4 - HKLM\..\Run: [AtiPTA] atiptaxx.exe
O4 - HKLM\..\Run: [NeroCheck] C:\WINNT\system32\NeroCheck.exe
O4 - HKLM\..\Run: [iTunesHelper] "C:\Programmi\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programmi\Java\jre1.5.0_06\bin\jusched.exe
O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe /STARTUP
O4 - HKCU\..\Run: [internat.exe] internat.exe
O4 - HKCU\..\Run: [swg] C:\Programmi\Google\GoogleToolbarNotifier\1.0.720. 3640\GoogleToolbarNotifier.exe
O4 - Startup: WinMySQLadmin.lnk = C:\mysql\bin\winmysqladmin.exe
O4 - Global Startup: Avvio veloce di Adobe Reader.lnk = C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: BlackICE Utility.lnk = C:\Programmi\Network ICE\BlackICE\blackice.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office\OSA9.EXE
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_06\bin\ssv.dll
O10 - Unknown file in Winsock LSP: c:\programmi\bonjour\mdnsnsp.dll
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsu...?1143722971045
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/ms...downloader.cab
O18 - Protocol: ms-help - {314111C7-A502-11D2-BBCA-00C04F8EC294} - C:\Programmi\File comuni\Microsoft Shared\Help\hxds.dll
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINNT\System32\Ati2evxx.exe
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
O23 - Service: AVG E-mail Scanner (AVGEMS) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
O23 - Service: BlackICE - Internet Security Systems, Inc. - C:\Programmi\Network ICE\BlackICE\blackd.exe
O23 - Service: Servizio Bonjour (Bonjour Service) - Apple Computer, Inc. - C:\Programmi\Bonjour\mDNSResponder.exe
O23 - Service: Servizio amministrativo di Gestione disco logico (dmadmin) - VERITAS Software Corp. - C:\WINNT\System32\dmadmin.exe
O23 - Service: ewido anti-spyware 4.0 guard - Anti-Malware Development a.s. - C:\Programmi\ewido anti-spyware 4.0\guard.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: iPodService - Apple Computer, Inc. - C:\Programmi\iPod\bin\iPodService.exe
O23 - Service: MySql - Unknown owner - C:/mysql/bin/mysqld-nt.exe
O23 - Service: SmartLinkService (SLService) - - C:\WINNT\SYSTEM32\slserv.exe

[LUCASS]

Il log mi sembra pulito

Ciao

[brutusin]

collegato ad internet ripreso il virus
scollegato
e ho fatto partire hijackthis ecco il nuovo file di log


Logfile of HijackThis v1.99.1
Scan saved at 12.43.06, on 01/10/2006
Platform: Windows 2000 SP4 (WinNT 5.00.2195)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:\WINNT\System32\smss.exe
C:\WINNT\system32\winlogon.exe
C:\WINNT\system32\services.exe
C:\WINNT\system32\lsass.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\system32\spoolsv.exe
C:\WINNT\System32\Ati2evxx.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
C:\Programmi\Network ICE\BlackICE\blackd.exe
C:\WINNT\System32\svchost.exe
C:\Programmi\ewido anti-spyware 4.0\guard.exe
C:\Programmi\File comuni\Microsoft Shared\VS7Debug\mdm.exe
C:\mysql\bin\mysqld-nt.exe
C:\WINNT\system32\regsvc.exe
C:\WINNT\system32\MSTask.exe
C:\WINNT\system32\slserv.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\WINNT\System32\mspmspsv.exe
C:\WINNT\system32\svchost.exe
C:\Programmi\Bonjour\mDNSResponder.exe
C:\WINNT\System32\inetsrv\inetinfo.exe
C:\WINNT\Explorer.EXE
C:\WINNT\system32\atiptaxx.exe
C:\Programmi\iTunes\iTunesHelper.exe
C:\Programmi\QuickTime\qttask.exe
C:\Programmi\Java\jre1.5.0_06\bin\jusched.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe
C:\WINNT\system32\internat.exe
C:\Programmi\iPod\bin\iPodService.exe
C:\Programmi\Google\GoogleToolbarNotifier\1.0.720. 3640\GoogleToolbarNotifier.exe
C:\Programmi\Network ICE\BlackICE\blackice.exe
C:\mysql\bin\winmysqladmin.exe
C:\WINNT\system32\iexplore.exe
C:\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.gustoinrete.com/
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
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre1.5.0_06\bin\ssv.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programmi\google\googletoolbar1.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINNT\System32\msdxm.ocx
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programmi\google\googletoolbar1.dll
O4 - HKLM\..\Run: [Synchronization Manager] mobsync.exe /logon
O4 - HKLM\..\Run: [ATIModeChange] Ati2mdxx.exe
O4 - HKLM\..\Run: [AtiPTA] atiptaxx.exe
O4 - HKLM\..\Run: [NeroCheck] C:\WINNT\system32\NeroCheck.exe
O4 - HKLM\..\Run: [iTunesHelper] "C:\Programmi\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programmi\Java\jre1.5.0_06\bin\jusched.exe
O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [Microsoft Internet Explorer] C:\WINNT\system32\iexplore.exe
O4 - HKCU\..\Run: [internat.exe] internat.exe
O4 - HKCU\..\Run: [swg] C:\Programmi\Google\GoogleToolbarNotifier\1.0.720. 3640\GoogleToolbarNotifier.exe
O4 - Startup: WinMySQLadmin.lnk = C:\mysql\bin\winmysqladmin.exe
O4 - Global Startup: Avvio veloce di Adobe Reader.lnk = C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: BlackICE Utility.lnk = C:\Programmi\Network ICE\BlackICE\blackice.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office\OSA9.EXE
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_06\bin\ssv.dll
O10 - Unknown file in Winsock LSP: c:\programmi\bonjour\mdnsnsp.dll
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsu...?1143722971045
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/ms...downloader.cab
O18 - Protocol: ms-help - {314111C7-A502-11D2-BBCA-00C04F8EC294} - C:\Programmi\File comuni\Microsoft Shared\Help\hxds.dll
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINNT\System32\Ati2evxx.exe
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
O23 - Service: AVG E-mail Scanner (AVGEMS) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
O23 - Service: BlackICE - Internet Security Systems, Inc. - C:\Programmi\Network ICE\BlackICE\blackd.exe
O23 - Service: Servizio Bonjour (Bonjour Service) - Apple Computer, Inc. - C:\Programmi\Bonjour\mDNSResponder.exe
O23 - Service: Servizio amministrativo di Gestione disco logico (dmadmin) - VERITAS Software Corp. - C:\WINNT\System32\dmadmin.exe
O23 - Service: ewido anti-spyware 4.0 guard - Anti-Malware Development a.s. - C:\Programmi\ewido anti-spyware 4.0\guard.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: iPodService - Apple Computer, Inc. - C:\Programmi\iPod\bin\iPodService.exe
O23 - Service: MySql - Unknown owner - C:/mysql/bin/mysqld-nt.exe
O23 - Service: SmartLinkService (SLService) - - C:\WINNT\SYSTEM32\slserv.exe

[LUCASS]

Ciao,adesso sei infetto

Avvia Hijackthis,clicca su "Do a system scan only"
Metti il flags nella casella che corrisponde a questa stringa
O4 - HKLM\..\Run: [Microsoft Internet Explorer] C:\WINNT\system32\iexplore.exe

Clicca su "Fix checked" per eliminarla

Elimina il file segnato in rosso C:\WINNT\system32\iexplore.exe

Riavvia il pc