problema trojan

[Pecunji]

da ormai 1 mese sul mio computer si è installato un trojan che non riesco assolutamente a rimuovere.

possiedo antivir personal edition classic.

ogni volta che apro internet explorer, ma a volte anche dal nulla, si attiva la finestra di detezione virus con il seguente messaggio:


C:\WINDOWS\JAVA\ABRAS.DLL

Is the Trojan horse TR/Agent.CS.1

ho provato a cancellare il file in questione, ma non riesco, nemmeno in modalità provvisoria. ho provato ad eseguire l'antivirus sempre in modalità provvisoria ma ancora niente. non posso fare il ripristino perchè ignoro la data in cui il trojan si è manifestato x la prima volta, dato che sono stato assente 5 mesi e quando sono tornato, un mese fa c'era già. mio fratello, oltre ad avere infettato il cpu nemmeno si ricorda quando. lo scazzo maggiore di questo troyan è che a un certo punto paralizza la connessione internet: il modem rimane connesso, ma lo scambio di dati non avviene.

ho scaricato HijackThis ed ho fatto la scansione. questo è il log

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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\AVPersonal\AVGUARD.EXE
C:\Programmi\AVPersonal\AVWUPSRV.EXE
C:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
C:\Programmi\File comuni\Microsoft Shared\VS7Debug\mdm.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\rundll32.exe
C:\Programmi\AVPersonal\AVGNT.EXE
C:\Programmi\MSN Apps\Updater\01.03.0000.1005\it\msnappau.exe
C:\Programmi\Messenger Plus! 3\MsgPlus.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\MSN Messenger\msnmsgr.exe
C:\WINDOWS\system32\NotifyPhoneBook.exe
C:\Programmi\eMule\emule.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Documents and Settings\Riccardo\Desktop\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = file://C:\DOCUME~1\Riccardo\IMPOST~1\Temp\sp.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = file://C:\DOCUME~1\Riccardo\IMPOST~1\Temp\sp.html
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://runonce.msn.com/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = res://C:\DOCUME~1\Efrem\IMPOST~1\Temp\se.dll/sp.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = about:blank
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = file://C:\DOCUME~1\Riccardo\IMPOST~1\Temp\sp.html
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = about:blank
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page_bak = about:blank
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,HomeOldSP = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,HomeOldSP = about:blank
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
R3 - URLSearchHook: (no name) - _{CFBFAE00-17A6-11D0-99CB-00C04FD64497} - (no file)
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: MSEvents Object - {44240BB5-BD7D-4D49-A1AA-8AB0F3D3CB44} - C:\WINDOWS\java\abras.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: ST - {9394EDE7-C8B5-483E-8773-474BF36AF6E4} - C:\Programmi\MSN Apps\ST\01.03.0000.1005\en-xu\stmain.dll
O2 - BHO: MSNToolBandBHO - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\MSN Apps\MSN Toolbar\01.02.4000.1001\it\msntb.dll
O2 - BHO: (no name) - {C77DA78E-5D4B-4569-B216-F4B2C3CFDFEB} - C:\WINDOWS\system32\dllhbaa.dll (file missing)
O3 - Toolbar: MSN - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\MSN Apps\MSN Toolbar\01.02.4000.1001\it\msntb.dll
O4 - HKLM\..\Run: [Connector] C:\WINDOWS\system32\ShellExt\sis.EXE -n
O4 - HKLM\..\Run: [AME_CSA] rundll32 amecsa.cpl,RUN_DLL
O4 - HKLM\..\Run: [AVGCtrl] C:\Programmi\AVPersonal\AVGNT.EXE /min
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [msnappau] "C:\Programmi\MSN Apps\Updater\01.03.0000.1005\it\msnappau.exe"
O4 - HKLM\..\Run: [MessengerPlus3] "C:\Programmi\Messenger Plus! 3\MsgPlus.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [msnmsgr] "C:\Programmi\MSN Messenger\msnmsgr.exe" /background
O8 - Extra context menu item: &Add animation to IncrediMail Style Box - C:\PROGRA~1\INCRED~1\bin\resources\WebMenuImg.htm
O8 - Extra context menu item: &Download with &DAP - C:\PROGRA~1\DAP\dapextie.htm
O8 - Extra context menu item: Download &all with DAP - C:\PROGRA~1\DAP\dapextie2.htm
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_02\bin\npjpi150_02.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_02\bin\npjpi150_02.dll
O9 - Extra button: Messenger - {4528BBE0-4E08-11D5-AD55-00010333D0AD} - C:\Programmi\Yahoo!\Messenger\yhexbmes0411.dll
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {4528BBE0-4E08-11D5-AD55-00010333D0AD} - C:\Programmi\Yahoo!\Messenger\yhexbmes0411.dll
O9 - Extra button: ShopperReports - Compare travel rates - {946B3E9E-E21A-49c8-9F63-900533FAFE14} - C:\WINDOWS\System32\shdocvw.dll
O9 - Extra button: ShopperReports - Compare product prices - {E77EDA01-3C56-4a96-8D08-02B42891C169} - C:\WINDOWS\System32\shdocvw.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
O9 - Extra button: Connector - {FFB51760-344E-4FFB-BFFF-4B18C7AC1D63} - C:\WINDOWS\system32\ShellExt\sis.EXE (file missing)
O15 - Trusted Zone: www.sgrunt.biz
O15 - Trusted Zone: www.xbeta69.com
O16 - DPF: {0B682CC1-FB40-4006-A5DD-99EDD3C9095D} (vbiewer control) - http://www.thepaymentcentre.com/build/vbiewer.cab
O16 - DPF: {12398DD6-40AA-4C40-A4EC-A42CFC0DE797} (Installer Class) - http://www.xxxtoolbar.com/ist/softwa...06_regular.cab
O16 - DPF: {16E166F9-35E8-4CA5-B50D-5CEFABF45B09} - http://www.sgrunt.biz/new.exe
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://spaces.msn.com//PhotoUpload/MsnPUpld.cab
O16 - DPF: {5A447319-0EA2-447B-A063-A5F849B097D0} (ScanZillaLE Class) - https://www.stopzilla.com/scanner/binaries/SZScanLE.cab
O16 - DPF: {91433D86-9F27-402C-B5E3-DEBDD122C339} - http://www.netvenda.com/sites/gamdr-it/itd/games3.cab
O16 - DPF: {A17E30C4-A9BA-11D4-8673-60DB54C10000} (YahooYMailTo Class) - http://us.dl1.yimg.com/download.yaho...ymmapi_416.dll
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/Ms...Downloader.cab
O16 - DPF: {DB893839-10F0-4AF9-92FA-B23528F530AF} - http://deposito.hostance.net/dialer/1056270.exe
O17 - HKLM\System\CCS\Services\Tcpip\..\{577ED9B9-9C2B-443D-A4B1-F8497C1A7887}: NameServer = 213.205.32.70 213.205.36.70
O18 - Filter: text/html - {B91AAEB8-B01C-4A9D-B41A-AF071EF12E9F} - C:\WINDOWS\system32\dllhbaa.dll
O20 - Winlogon Notify: abras - C:\WINDOWS\java\abras.dll
O23 - Service: AntiVir Service (AntiVirService) - H+BEDV Datentechnik GmbH - C:\Programmi\AVPersonal\AVGUARD.EXE
O23 - Service: AntiVir Update (AVWUpSrv) - H+BEDV Datentechnik GmbH, Germany - C:\Programmi\AVPersonal\AVWUPSRV.EXE
O23 - Service: EPSON Printer Status Agent2 (EPSONStatusAgent2) - SEIKO EPSON CORPORATION - C:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: SymWMI Service (SymWSC) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\Security Center\SymWSC.exe

che devo fare? non ho voglia di formattare :P aiuto!!