我感染了一种不知名木马，各类杀毒软件都无法清除，特征是在打开网页时会在屏幕右下角出现一个广告窗口，无法关闭，在未联网状态下也会弹出一个窗口，点击右键属性，地址项目有以下内容res://C:\winnt\System32\shdoclc.dll/dnserror.htm#htpp://www.chaxun.com/out/ayq18dx19.htm?
mmid＝o&vendor=css10000&guid=c9856118-79a7-496e-ao5c-2319440f04eb&wow=1
我也尝试了从安全模式进入系统后，运行sfc命令，仍然解决不了
我的系统是win2000
请教各位高手指教，小弟虚心领受，不胜感激！

HijackThis_815汉化版扫描日志 V1.99.1
保存于      17:48:33, 日期 2005-9-23
操作系统：  Windows 2000 SP4 (WinNT 5.00.2195)
浏览器：    Internet Explorer v6.00 SP1 (6.00.2800.1106)

当前运行的进程：         
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\svchost.exe
C:\WINNT\system32\regsvc.exe
D:\PROGRAM FILES\RISING\RAV\CCENTER.EXE
C:\WINNT\system32\MSTask.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\WINNT\system32\mspmspsv.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\Explorer.EXE
C:\WINNT\system32\rundll32.exe
C:\WINNT\system32\rundll32.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
D:\PROGRA~1\RISING\RAV\RAVTIMER.EXE
C:\Program Files\Java\jre1.5.0_04\bin\jusched.exe
C:\WINNT\system32\RUNDLL32.exe
C:\WINNT\system32\internat.exe
C:\Program Files\DuDu\DddClient\DuDuAcc.exe
C:\Program Files\DuDu\DddClient\dudupros.exe
C:\WINNT\system32\conime.exe
D:\PROGRAM FILES\RISING\RAV\Ravmond.exe
D:\PROGRAM FILES\RISING\RAV\RavStub.exe
d:\program files\rising\rav\RAVMON.EXE
C:\Wholewise\IMR\Bin\IMR.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Documents and Settings\zhangkaicheng\桌面\4842302005817230232\HijackThis1991zww.exe

R3 - URLSearchHook: 雅虎助手 - {406F94F0-504F-4a40-8DFD-58B0666ABEBD} - C:\PROGRA~1\Yahoo!\Assistant\Assist\yasbar.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - D:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: EyeOnBrowser Class - {1272F701-349D-4DB3-BBCD-10CBDCD049FE} - C:\WINNT\Downlo~1\_IS_0518\_IS_WEBH.dll
O2 - BHO: 雅虎助手 - {406F94F0-504F-4a40-8DFD-58B0666ABEBD} - C:\PROGRA~1\Yahoo!\Assistant\Assist\yasbar.dll
O2 - BHO: 3721中文邮 - {6231D512-E4A4-4DF2-BE62-5B8F0EE348EF} - C:\PROGRA~1\3721\Ces\cesweb.dll
O2 - BHO: YDragSearch - {62EED7C6-9F02-42f9-B634-98E2899E147B} - C:\PROGRA~1\Yahoo!\ASSIST~1\Assist\YDRAGS~1.DLL
O2 - BHO: DDDMon Class - {6BDE1669-B490-48E3-B668-456314F2D6C3} - C:\Program Files\DuDu\DddClient\dddiemon.dll
O2 - BHO: IE - {D157330A-9EF3-49F8-9A67-4141AC41ADD4} - C:\WINNT\DOWNLO~1\CnsHook.dll
O3 - IE工具栏增项: 电台(&R) - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINNT\system32\msdxm.ocx
O3 - IE工具栏增项: 雅虎助手 - {406F94F0-504F-4a40-8DFD-58B0666ABEBD} - C:\PROGRA~1\Yahoo!\Assistant\Assist\yasbar.dll
O4 - 启动项HKLM\\Run: [Synchronization Manager] mobsync.exe /logon
O4 - 启动项HKLM\\Run: [IgfxTray] rem C:\WINNT\System32\igfxtray.exe
O4 - 启动项HKLM\\Run: [HotKeysCmds] rem C:\WINNT\System32\hkcmd.exe
O4 - 启动项HKLM\\Run: [CnsMin] rem Rundll32.exe C:\WINNT\DOWNLO~1\CnsMin.dll,Rundll32
O4 - 启动项HKLM\\Run: [cesmain.dll] C:\WINNT\system32\rundll32.exe C:\PROGRA~1\3721\Ces\cmail.dll,Rundll32
O4 - 启动项HKLM\\Run: [helper.dll] C:\WINNT\system32\rundll32.exe C:\PROGRA~1\3721\helper.dll,Rundll32
O4 - 启动项HKLM\\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe"  -osboot
O4 - 启动项HKLM\\Run: [RavTimer] D:\PROGRA~1\RISING\RAV\RAVTIMER.EXE
O4 - 启动项HKLM\\Run: [RavMon] D:\PROGRA~1\RISING\RAV\RAVMON.EXE -SYSTEM
O4 - 启动项HKLM\\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_04\bin\jusched.exe
O4 - 启动项HKLM\\Run: [advapi32] RUNDLL32 C:\WINNT\Downlo~1\_IS_0518\_IS_ISC.DLL,isc
O4 - HKCU\..\Run: [Internat.exe] internat.exe
O4 - Global Startup: DuDu加速器.lnk = C:\Program Files\DuDu\DddClient\DuDuAcc.exe
O8 - IE右键菜单中的新增项目: !搜一搜 - res://C:\WINNT\DOWNLO~1\CnsMinEx.dll/1003
O8 - IE右键菜单中的新增项目: &使用DuDu 加速器下载 - res://C:\Program Files\DuDu\DddClient\dddmext.dll/202
O9 - 浏览器额外的按钮: 手机短信 - {00000000-0000-0001-0001-596BAEDD1289} - http://sms.3721.com/ie/index.htm (file missing)
O9 - 浏览器额外的按钮: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - 浏览器额外的“工具”菜单项: Sun Java 控制台 - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - 浏览器额外的按钮: 浩方对战平台 - {0A155D3C-68E2-4215-A47A-E800A446447A} - C:\Program Files\浩方对战平台\GameClient.exe
O9 - 浏览器额外的按钮: 下载管理 - {3DB9F45E-AA74-4373-A466-C18A9F1C500D} - C:\Program Files\DuDu\DddClient\DuDuAcc.exe
O9 - 浏览器额外的“工具”菜单项: 下载管理 - {3DB9F45E-AA74-4373-A466-C18A9F1C500D} - C:\Program Files\DuDu\DddClient\DuDuAcc.exe
O9 - 浏览器额外的按钮: Yahoo 1G电邮 - {507F9113-CD77-4866-BA92-0E86DA3D0B97} - http://cn.mail.yahoo.com/promo/rd1 (file missing)
O9 - 浏览器额外的按钮: 寻宝乐趣多 - {59BC54A2-56B3-44a0-93E5-432D58746E26} - http://hot.3721.com/rd/shop_btn.htm (file missing)
O9 - 浏览器额外的按钮: 上网助手 - {5D73EE86-05F1-49ed-B850-E423120EC338} - http://assistant.3721.com/index.htm?fb=Cns (file missing)
O9 - 浏览器额外的按钮: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINNT\web\related.htm
O9 - 浏览器额外的“工具”菜单项: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINNT\web\related.htm
O9 - 浏览器额外的按钮: 情景聊天 - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - http://cn.rd.yahoo.com/home/messenger/bjk/clientbtn/?http://cn.messenger.yahoo.com/ (file missing)
O9 - 浏览器额外的按钮: (no name) - {ECF2E268-F28C-48d2-9AB7-8F69C11CCB71} - http://assistant.3721.com/security1.htm?fb=Cns (file missing)
O9 - 浏览器额外的“工具”菜单项: 修复浏览器 - {ECF2E268-F28C-48d2-9AB7-8F69C11CCB71} - http://assistant.3721.com/security1.htm?fb=Cns (file missing)
O9 - 浏览器额外的按钮: (no name) - {FD00D911-7529-4084-9946-A29F1BDF4FE5} - http://assistant.3721.com/clean1.htm?fb=Cns (file missing)
O9 - 浏览器额外的“工具”菜单项: 清理上网记录 - {FD00D911-7529-4084-9946-A29F1BDF4FE5} - http://assistant.3721.com/clean1.htm?fb=Cns (file missing)
O11 - Options group: [!CNS]  网络实名
O17 - HKLM\System\CCS\Services\Tcpip\..\{4D770CD8-7000-4DB5-81FB-C1CD4CF6F74B}: NameServer = 202.103.44.5,202.103.0.117
O18 - 列举现有的协议: koboo - {7DEE9D05-FA0A-4416-A6F3-6537D0EAB6A6} - C:\WINNT\system32\mbprot.dll
O20 - Winlogon Notify: igfxcui - C:\WINNT\SYSTEM32\igfxsrvc.dll
O23 - NT 服务: Logical Disk Manager Administrative Service (dmadmin) - VERITAS Software Corp. - C:\WINNT\System32\dmadmin.exe
O23 - NT 服务: Visibroker Activation Daemon (oad) - Unknown owner - C:\PROGRA~1\Borland\vbroker\bin\oad.exe
O23 - NT 服务: VisiBroker Smart Agent (osagent) - Unknown owner - C:\PROGRA~1\Borland\vbroker\bin\osagent.exe
O23 - NT 服务: Rising Process Communication Center (RsCCenter) - rising - D:\PROGRAM FILES\RISING\RAV\CCENTER.EXE
O23 - NT 服务: RsRavMon Service (RsRavMon) - Beijing Rising Technology Co., Ltd. - D:\PROGRAM FILES\RISING\RAV\Ravmond.exe