Hi everyone,

A back door trojan is catched by AVG in my computer but each time when I reboot the computer the trojan will come out again. please find out how can I delete it.

Trojan name found out by AVG: Trojan horse BackDoor.Generic3.AET
Trijan posistion: c:\winnt\system32\xuhuan.exe
file name: xuhuan.exe
OS I'm using: windows 2000

I noticed, each time when the trojan come out, there will be a file pt.exe show up in floder:
/Local Settings/Temporary Internet Files/

the details info for this pt.exe is:

file name: pt.exe
Internet address: news.5199home.com/dijin/pt.exe
size: 43kb

hijackthis.log attached as following, your advice is much appreciated:

Logfile of HijackThis v1.99.1
Scan saved at 22:15:34, on 2006-9-23
Platform: Windows 2000 SP3 (WinNT 5.00.2195)
MSIE: Internet Explorer v5.00 SP3 (5.00.2920.0000)

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:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
C:\WINNT\System32\svchost.exe
C:\Program Files\ewido anti-spyware 4.0\guard.exe
C:\WINNT\system32\MSTask.exe
C:\WINNT\system32\ZoneLabs\vsmon.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\Explorer.EXE
C:\Program Files\Java\jre1.5.0_06\bin\jusched.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe
C:\PROGRA~1\BILLPS~1\WINPAT~1\winpatrol.exe
C:\Program Files\ewido anti-spyware 4.0\ewido.exe
C:\WINNT\System32\internat.exe
E:\Program Files\Zone Labs\ZoneAlarm\zapro.exe
F:\Program Files\firefox\firefox.exe
C:\WINNT\System32\wuauclt.exe
E:\tools\anti-spy\anti-trojan\HijackThis.exe

R3 - Default URLSearchHook is missing
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\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: [WinPatrol] C:\PROGRA~1\BILLPS~1\WINPAT~1\winpatrol.exe
O4 - HKLM\..\Run: [!ewido] "C:\Program Files\ewido anti-spyware 4.0\ewido.exe" /minimized
O4 - HKCU\..\Run: [Internat.exe] internat.exe
O4 - Startup: TimeLeft.lnk = E:\Program Files\TimeLeft3\TimeLeft.exe
O4 - Global Startup: ZoneAlarm Pro.lnk = E:\Program Files\Zone Labs\ZoneAlarm\zapro.exe
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java 控制台 - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O14 - IERESET.INF: SEARCH_PAGE_URL=
O14 - IERESET.INF: START_PAGE_URL=
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/…b?1122519441984
O17 - HKLM\System\CCS\Services\Tcpip\..\{9F888F25-88B8-42D0-8106-ECB456004EA9}: NameServer = 192.168.0.1
O18 - Protocol: about - {3050F406-98B5-11CF-BB82-00AA00BDCE0B} - C:\WINNT\System32\mshtml.dll
O18 - Protocol: cdl - {3DD53D40-7B8B-11D0-B013-00AA0059CE02} - C:\WINNT\System32\urlmon.dll
O18 - Protocol: file - {79EAC9E7-BAF9-11CE-8C82-00AA004BA90B} - C:\WINNT\System32\urlmon.dll
O18 - Protocol: ftp - {79EAC9E3-BAF9-11CE-8C82-00AA004BA90B} - C:\WINNT\System32\urlmon.dll
O18 - Protocol: gopher - {79EAC9E4-BAF9-11CE-8C82-00AA004BA90B} - C:\WINNT\System32\urlmon.dll
O18 - Protocol: http - {79EAC9E2-BAF9-11CE-8C82-00AA004BA90B} - C:\WINNT\System32\urlmon.dll
O18 - Protocol: https - {79EAC9E5-BAF9-11CE-8C82-00AA004BA90B} - C:\WINNT\System32\urlmon.dll
O18 - Protocol: ipp - (no CLSID) - (no file)
O18 - Protocol: its - {9D148291-B9C8-11D0-A4CC-0000F80149F6} - C:\WINNT\System32\itss.dll
O18 - Protocol: javascript - {3050F3B2-98B5-11CF-BB82-00AA00BDCE0B} - C:\WINNT\System32\mshtml.dll
O18 - Protocol: local - {79EAC9E7-BAF9-11CE-8C82-00AA004BA90B} - C:\WINNT\System32\urlmon.dll
O18 - Protocol: mailto - {3050F3DA-98B5-11CF-BB82-00AA00BDCE0B} - C:\WINNT\System32\mshtml.dll
O18 - Protocol: mhtml - {05300401-BCBC-11D0-85E3-00C04FD85AB4} - C:\WINNT\System32\inetcomm.dll
O18 - Protocol: mk - {79EAC9E6-BAF9-11CE-8C82-00AA004BA90B} - C:\WINNT\System32\urlmon.dll
O18 - Protocol: ms-its - {9D148291-B9C8-11D0-A4CC-0000F80149F6} - C:\WINNT\System32\itss.dll
O18 - Protocol: msdaipp - (no CLSID) - (no file)
O18 - Protocol: res - {3050F3BC-98B5-11CF-BB82-00AA00BDCE0B} - C:\WINNT\System32\mshtml.dll
O18 - Protocol: sysimage - {76E67A63-06E9-11D2-A840-006008059382} - C:\WINNT\System32\mshtml.dll
O18 - Protocol: vbscript - {3050F3B2-98B5-11CF-BB82-00AA00BDCE0B} - C:\WINNT\System32\mshtml.dll
O20 - Winlogon Notify: MicroHQ - C:\WINNT\SYSTEM32\divx32.dll
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: Logical Disk Manager Administrative Service (dmadmin) - VERITAS Software Corp. - C:\WINNT\System32\dmadmin.exe
O23 - Service: ewido anti-spyware 4.0 guard - Anti-Malware Development a.s. - C:\Program Files\ewido anti-spyware 4.0\guard.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs Inc. - C:\WINNT\system32\ZoneLabs\vsmon.exe
O23 - Service: WinFax PRO (wfxsvc) - Symantec Corporation - C:\WINNT\System32\WFXSVC.EXE