我的开机后用瑞星总发现Backdoor.GPigeon.vla。请好心人帮我分析一下！如何处理？
用大家推荐的HijackThis v1.99.1查系统如下：
Logfile of HijackThis v1.99.1
Scan saved at 9:14:27, on 2006-10-26
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Running processes:
D:\WINDOWS\System32\smss.exe
D:\WINDOWS\system32\winlogon.exe
D:\WINDOWS\system32\services.exe
D:\WINDOWS\system32\lsass.exe
D:\WINDOWS\system32\svchost.exe
D:\Program Files\rising\Rav\CCenter.exe
D:\WINDOWS\System32\svchost.exe
D:\Program Files\rising\Rav\Ravmond.exe
D:\WINDOWS\system32\spoolsv.exe
D:\Program Files\rising\Rav\RavStub.exe
D:\WINDOWS\Explorer.EXE
D:\WINDOWS\essspk.exe
D:\Program Files\rising\Rav\RavTask.exe
D:\Program Files\rising\Rav\Ravmon.exe
D:\WINDOWS\vsnppro.exe
D:\WINDOWS\SOUNDMAN.EXE
D:\PROGRA~1\Yahoo!\ASSIST~1\YLive.exe
D:\WINDOWS\system32\ctfmon.exe
D:\WINDOWS\mshosts.exe
D:\WINDOWS\system32\svchost.exe
G:\software\ha_hijackthis_1991\HijackThis.exe
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - D:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: yPhtb - {33BBE430-0E42-4f12-B075-8D21ACB10DCB} - D:\PROGRA~1\Yahoo!\ASSIST~1\Assist\yphtb.dll
O2 - BHO: Anti Fish - {38928D50-8A48-44C2-945F-D2F23F771410} - D:\PROGRA~1\Yahoo!\ASSIST~1\Assist\yangling.dll
O2 - BHO: 雅虎助手 - {406F94F0-504F-4a40-8DFD-58B0666ABEBD} - D:\PROGRA~1\Yahoo!\ASSIST~1\Assist\yasbar.dll
O2 - BHO: YDragSearch - {62EED7C6-9F02-42f9-B634-98E2899E147B} - D:\PROGRA~1\Yahoo!\ASSIST~1\Assist\YDRAGS~1.DLL
O2 - BHO: (no name) - {69D23154-CA31-43E9-BEEB-F78E6D1642B3} - D:\WINDOWS\system32\3721.6.dll
O2 - BHO: IeCatch2 Class - {A5366673-E8CA-11D3-9CD9-0090271D075B} - G:\software\FLASHGET\jccatch.dll
O3 - Toolbar: 雅虎助手 - {406F94F0-504F-4a40-8DFD-58B0666ABEBD} - D:\PROGRA~1\Yahoo!\ASSIST~1\Assist\yasbar.dll
O4 - HKLM\..\Run: [IMJPMIG8.1] "D:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE" /Spoil /RemAdvDef /Migration32
O4 - HKLM\..\Run: [PHIME2002ASync] D:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /SYNC
O4 - HKLM\..\Run: [PHIME2002A] D:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /IMEName
O4 - HKLM\..\Run: [EssSpkPhone] essspk.exe
O4 - HKLM\..\Run: [RavTask] "D:\Program Files\rising\Rav\RavTask.exe" -system
O4 - HKLM\..\Run: [snppro] D:\WINDOWS\vsnppro.exe
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [YLive.exe] D:\PROGRA~1\Yahoo!\ASSIST~1\YLive.exe
O4 - HKLM\..\Run: [ExFilter] Rundll32.exe "D:\PROGRA~1\CNNIC\Cdn\cdnspie.dll,ExecFilter solo"
O4 - HKCU\..\Run: [ctfmon.exe] D:\WINDOWS\system32\ctfmon.exe
O4 - Global Startup: Microsoft Office.lnk = D:\Program Files\Microsoft Office\Office\OSA9.EXE
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: 使用网际快车下载 - G:\software\FlashGet\jc_link.htm
O8 - Extra context menu item: 使用网际快车下载全部链接 - G:\software\FlashGet\jc_all.htm
O8 - Extra context menu item: 添加到雅虎订阅(&Y) - res://D:\PROGRA~1\Yahoo!\ASSIST~1\Assist\yrss.dll/YRSSMENUEXT
O8 - Extra context menu item: 用比特精灵下载(&B) - G:\software\BitSpirit\bsurl.htm
O9 - Extra button: QQ - {c95fe080-8f5d-11d2-a20b-00aa003c157b} - D:\WINDOWS\system32\shdocvw.dll
O9 - Extra 'Tools' menuitem: 腾讯QQ - {c95fe080-8f5d-11d2-a20b-00aa003c157b} - D:\WINDOWS\system32\shdocvw.dll
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab31267.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab31267.cab
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "D:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O23 - Service: GrayPigeon_FTP - Unknown owner - D:\WINDOWS\FTP.exe
O23 - Service: host Service For Windows (mshosts) - Unknown owner - D:\WINDOWS\mshosts.exe
O23 - Service: Rising Process Communication Center (RsCCenter) - Beijing Rising Technology Co., Ltd. - D:\Program Files\rising\Rav\CCenter.exe
O23 - Service: RsRavMon Service (RsRavMon) - Beijing Rising Technology Co., Ltd. - D:\Program Files\rising\Rav\Ravmond.exe
