W32.Spybot.YXX

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Discovered: October 19, 2005
Updated: February 13, 2007 12:45:41 PM
Type: Worm
Systems Affected: Windows



W32.Spybot.YXX is a network-aware worm that opens a back door on the compromised computer. It spreads by exploiting common system vulnerabilities. The worm is also dropped by W32.Botter.A@mm .

Antivirus Protection Dates

  • Initial Rapid Release version October 20, 2005
  • Latest Rapid Release version October 20, 2005
  • Initial Daily Certified version October 20, 2005
  • Latest Daily Certified version October 20, 2005
  • Initial Weekly Certified release date October 26, 2005

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Writeup By: Rodney Andres

Discovered: October 19, 2005
Updated: February 13, 2007 12:45:41 PM
Type: Worm
Systems Affected: Windows


When W32.Spybot.YXX is executed, it performs the following actions:

  1. Displays the following fake error message:





    Title: Warning
    Message: VMM32.VXD: Missing/Unable to Load.

  2. Creates the following copies of itself:

    • %System%\Programs\2 Find MP3 8.2.0.exe
    • %System%\Programs\Fifa 2006 crack.exe
    • %System%\Programs\Hotmail account hacker in 30 minutes.exe
    • %System%\Programs\Hotmail hacker.exe
    • %System%\Programs\Hotmailhacker v1.0.exe
    • %System%\Programs\hotmail_account_sniffer.exe
    • %System%\Programs\Microsoft Office 2000 Regmaker.exe
    • %System%\Programs\Microsoft Office 2003 Professional Universal Crack without serial.exe
    • %System%\Programs\Microsoft Office XP Activation Crack.exe
    • %System%\Programs\Microsoft Office XP Activation Killer.exe
    • %System%\Programs\Microsoft Office XP Professional Crack.exe
    • %System%\Programs\Microsoft Office XP Professional Serial.exe
    • %System%\Programs\Microsoft Office XP Universal Activator v1.0.exe
    • %System%\Programs\Midnight Club 3 - DUB Edition Rockstar Games crack.exe
    • %System%\Programs\norton anti virus FULL NEWEST VERSION.exe
    • %System%\Programs\Norton AntiVirus 2005 crack.exe
    • %System%\Programs\Norton AntiVirus 2006 crack.exe
    • %System%\Programs\Norton antivirus crack.exe
    • %System%\Programs\porn.exe
    • %System%\Programs\pornmovie (hardcore sex adult asian).exe
    • %System%\Programs\porn_account_cracker.exe
    • %System%\Programs\porn_account_hacker.exe
    • %System%\Programs\yahoo_cracker.exe
    • %System%\Programs\yahoo_hacker.exe
    • %System%\Programs\Yahoo_mail_cracker.exe
    • %System%\Programs\Yoshinoya Success crack.exe
    • %System%\Programs\ZoneAlarm crack (keygen).exe
    • %System%\wkssvc.exe

      Note: %System% is a variable that refers to the System folder. By default this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

  3. Creates C:\system.exe. This dropped file, in turn, copies itself to %Windir%\gencroot.exe. The worm uses this file to hide itself from the user and is considered malicious.

    Note: %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

  4. Creates the harmless text file C:\autoexec.

  5. Adds the value:

    "Windows Workstation Service" = "wkssvc.exe"

    to the registry subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole
    HKEY_CURRENT_USER\Software\Microsoft\OLE
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
    HKEY_CURRENT_USER\SYSTEM\CurrentControlSet\Control\Lsa
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunServices

    so that it runs every time Windows starts.

  6. Adds the value:

    "gencroot" = "%Windir%\gencroot.exe"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

    so that it runs every time Windows starts.

  7. Creates the following service which will run even in Safe Mode:

    Display Name: Windows Workstation Service

  8. Adds the value:

    "@" = "Service"

    to the registry subkeys:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\Windows Workstation Service
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\Windows Workstation Service

    to create this service.

  9. Adds the value:

    "*NewlyCreated*" = "0"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WINDOWS_WORKSTATION_SERVICE\0000\Control

    to create this service.

  10. Adds the values:

    "Service" = "Windows Workstation Service"
    "Legacy" = "1"
    "ConfigFlags" = "0"
    "Class" = "LegacyDriver"
    "ClassGUID" = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
    "DeviceDesc" = "Windows Workstation Service"
    "NextInstance" = "1"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WINDOWS_WORKSTATION_SERVICE\0000|

    to create this service.

  11. Adds the values:

    "0" = "Root\LEGACY_WINDOWS_WORKSTATION_SERVICE\0000"
    "Count" = "1"
    "NextInstance" = "1"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Workstation Service\Enum

    to create this service.

  12. Adds the value:

    "Security" = "01 00 14 80 90 00 00 00 9C 00 00 00 14 00 00 00 30 00 00 00 02 00 1C 00 01 00 00 00 02 80 14 00 FF 01 0F 00 01 01 00 00 00 00 00 01 00 00 00 00 02 00 60 00 04 00 00 00 00 00 14 00 FD 01 02 00 01 01 00 00 00 00 00 05 12 00 00 00 00 00 18 00 FF 01 0F 00 01 02 00 00 00 00 00 05 20 00 00 00 20 02 00 00 00 00 14 00 8D 01 02 00 01 01 00 00 00 00 00 05 0B 00 00 00 00 00 18 00 FD 01 02 00 01 02 00 00 00 00 00 05 20 00 00 00 23 02 00 00 01 01 00 00 00 00 00 05 12 00 00 00 01 01 00 00 00 00 00 05 12 00 00 00"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Workstation Service\Security

    to create this service.

  13. Adds the values:

    "Type" = "10"
    "Start" = "2"
    "ErrorControl" = "0"
    "ImagePath" = "%Windir%\gencroot.exe"
    "DisplayName" = "Windows Workstation Service"
    "ObjectName" = "LocalSystem"
    "Description" = "TurkSpy for Nt RootKit"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Workstation Service

    to create this service.

  14. Adds the value:

    "Dir0" = "%PROGRAMFILES%\Programs"

    to the registry subkey:

    HKEY_CURRENT_USER\Software\Kazaa\LocalContent

  15. Adds the value:

    "EnableDCOM" = "N"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole

    to disable DCOM.

  16. Adds the value:

    "restrictanonymous" = "1"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa

    to prevent NULL session enumeration of the host.

  17. Adds the value:

    "Start" = "4"

    to the registry subkeys:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv

    to disable the Shared Access service in Windows 2000/XP.

  18. Creates the registry subkey:

    HKEY_CURRENT_USER\Software\Kazaa

  19. Creates and runs the file C:\sirh0t_changes_ur_hostfile.bat, which is a batch script that sets the hosts file attributes to Read-only, Archive, System, Hidden. The batch script also inserts the following lines in the hosts file:

    80.1[RANDOM] www.symantec.com
    80.1[RANDOM] securityresponse.symantec.com
    80.1[RANDOM] symantec.com
    80.1[RANDOM] pandasoftware.com
    80.1[RANDOM] www.pandasoftware.com
    80.1[RANDOM] www.sophos.com
    80.1[RANDOM] sophos.com
    80.1[RANDOM] www.mcafee.com
    80.1[RANDOM] mcafee.com
    80.1[RANDOM] downloads-us1.kaspersky-labs.com
    80.1[RANDOM] updates1.kaspersky-labs.com
    80.1[RANDOM] updates2.kaspersky-labs.com
    80.1[RANDOM] updates3.kaspersky-labs.com
    80.1[RANDOM] downloads1.kaspersky-labs.com
    80.1[RANDOM] downloads2.kaspersky-labs.com
    80.1[RANDOM] downloads3.kaspersky-labs.com
    80.1[RANDOM] ftp.downloads1.kaspersky-labs.com
    80.1[RANDOM] ftp.downloads2.kaspersky-labs.com
    80.1[RANDOM] ftp.downloads3.kaspersky-labs.com
    80.1[RANDOM] liveupdate.symantecliveupdate.com
    80.1[RANDOM] www.viruslist.com
    80.1[RANDOM] viruslist.com
    80.1[RANDOM] f-secure.com
    80.1[RANDOM] www.f-secure.com
    80.1[RANDOM] kaspersky.com
    80.1[RANDOM] kaspersky-labs.com
    80.1[RANDOM] www.avp.com
    80.1[RANDOM] www.kaspersky.com
    80.1[RANDOM] avp.com
    80.1[RANDOM] www.networkassociates.com
    80.1[RANDOM] networkassociates.com
    80.1[RANDOM] www.ca.com
    80.1[RANDOM] ca.com
    80.1[RANDOM] mast.mcafee.com
    80.1[RANDOM] my-etrust.com
    80.1[RANDOM] www.my-etrust.com
    80.1[RANDOM] download.mcafee.com
    80.1[RANDOM] dispatch.mcafee.com
    80.1[RANDOM] secure.nai.com
    80.1[RANDOM] nai.com
    80.1[RANDOM] www.nai.com
    80.1[RANDOM] update.symantec.com
    80.1[RANDOM] updates.symantec.com
    80.1[RANDOM] us.mcafee.com
    80.1[RANDOM] liveupdate.symantec.com
    80.1[RANDOM] customer.symantec.com
    80.1[RANDOM] rads.mcafee.com
    80.1[RANDOM] trendmicro.com
    80.1[RANDOM] www.trendmicro.com
    80.1[RANDOM] www.grisoft.com
    80.1[RANDOM] virustotal.com
    80.1[RANDOM] www.virustotal.com
    80.1[RANDOM] windowsupdate.microsoft.com
    80.1[RANDOM] www.microsoft.com
    80.1[RANDOM] microsoft.com
    80.1[RANDOM] virusscan.jotti.org

  20. Ends the following processes:

    • ACKWIN32.EXE
    • ADVXDWIN.EXE
    • AGENTSVR.EXE
    • AGV.EXE
    • AHNSD.EXE
    • ALERTSVC.EXE
    • ALOGSERV.EXE
    • AMON.EXE
    • AMON9X.EXE
    • AMONAVP32.EXE
    • ANTIVIR.EXE
    • ANTIVIRUS.EXE
    • ANTS.EXE
    • ANTSSIRCAM.EXE
    • APIMONITOR.EXE
    • APLICA32.EXE
    • APVXDWIN.EXE
    • ATCON.EXE
    • ATGUARD.EXE
    • ATS.EXE
    • ATSCAN.EXE
    • ATUPDATER.EXE
    • ATWATCH.EXE
    • AUTODOWN.EXE
    • AUTOTRACE.EXE
    • AUTOUPDATE.EXE
    • AVCONSOL.EXE
    • AVE32.EXE
    • AVGCC32.EXE
    • AVGCTRL.EXE
    • AVGSERV.EXE
    • AVGSERV9.EXE
    • AVGSERV9SCHEDAPP.EXE
    • AVGW.EXE
    • AVKPOP.EXE
    • AVKSERV.EXE
    • AVKSERVICE.EXE
    • AVKWCL9.EXE
    • AVKWCTL9.EXE
    • AVNT.EXE
    • AVP.EXE
    • AVP32.EXE
    • AVPCC.EXE
    • AVPCCAVPM.EXE
    • AVPDOS32.EXE
    • AVPEXEC.EXE
    • AVPINST.EXE
    • AVPM.EXE
    • AVPMONITOR.EXE
    • AVPTC.EXE
    • AVPTC32.EXE
    • AVPUPD.EXE
    • AVPUPDATES.EXE
    • AVRESCUE.EXE
    • AVSCHED32.EXE
    • AVSYNMGR.EXE
    • AVWIN95.EXE
    • AVWINNT.EXE
    • AVWUPD32.EXE
    • AVXGUI.EXE
    • AVXINIT.EXE
    • AVXLIVE.EXE
    • AVXMONITOR9X.EXE
    • AVXMONITORNT.EXE
    • AVXNEWS.EXE
    • AVXQUAR.EXE
    • AVXSCH.EXE
    • AVXW.EXE
    • BACKLOG.EXE
    • BD_PROFESSIONAL.EXE
    • BIDEF.EXE
    • BIDSERVER.EXE
    • BIPCP.EXE
    • BISP.EXE
    • BLACKD.EXE
    • BLACKICE.EXE
    • BLACKICEBLACKD.EXE
    • BOOTWARN.EXE
    • BORG2.EXE
    • BS120.EXE
    • BULLGUARD.EXE
    • CCAPP.EXE
    • CCEVTMGR.EXE
    • CCIMSCAN.EXE
    • CCPWDSRC.EXE
    • CCPXYSVC.EXE
    • CCSETMGR.EXE
    • CDP.EXE
    • CFIADMIN.EXE
    • CFIAUDIT.EXE
    • CFINET.EXE
    • CFINET32.EXE
    • CLAW95.EXE
    • CLAW95CF.EXE
    • CLEAN.EXE
    • CLEANER.EXE
    • CLEANER3.EXE
    • CLEANPC.EXE
    • CMGRDIAN.EXE
    • CMON016.EXE
    • CODERED.EXE
    • CONNECTIONMONITOR.EXE
    • CONSEAL.EXE
    • CPD.EXE
    • CPF9X206.EXE
    • CTRL.EXE
    • DEFALERT.EXE
    • DEFENCE.EXE
    • DEFENSE.EXE
    • DEFSCANGUI.EXE
    • DEFWATCH.EXE
    • DEPUTY.EXE
    • DOORS.EXE
    • DPF.EXE
    • DRWATSON.EXE
    • DRWEB32.EXE
    • DVP95.EXE
    • DVP95_0.EXE
    • ECENGINE.EXE
    • EDISK.EXE
    • EFPEADM.EXE
    • ESAFE.EXE
    • ESCANH95.EXE
    • ESCANHNT.EXE
    • ESCANV95.EXE
    • ESPWATCH.EXE
    • ETRUSTCIPE.EXE
    • EVPN.EXE
    • EXPERT.EXE
    • FAMEH32.EXE
    • FAST.EXE
    • FCH32.EXE
    • FIH32.EXE
    • FINDVIRU.EXE
    • FIREWALL.EXE
    • FIX-IT.EXE
    • FLOWPROTECTOR.EXE
    • FNRB32.EXE
    • FPROT.EXE
    • FRW.EXE
    • FSAA.EXE
    • FSAV32.EXE
    • FSAV95.EXE
    • FSAVE32.EXE
    • FSGK32.EXE
    • FSM32.EXE
    • FSMA32.EXE
    • FSMB32.EXE
    • FWENC.EXE
    • GBMENU.EXE
    • GBPOLL.EXE
    • GEDIT.EXE
    • GENERICS.EXE
    • GRIEF3878.EXE
    • GUARD.EXE
    • GUARDDOG.EXE
    • HACKERELIMINATOR.EXE
    • HH.EXE
    • HIJACKTHIS.EXE
    • IAMAPP.EXE
    • IAMSERV.EXE
    • IAMSTATS.EXE
    • IBMASN.EXE
    • IBMAVSP.EXE
    • ICLOAD95.EXE
    • ICLOADNT.EXE
    • ICMON.EXE
    • ICSUPP95.EXE
    • ICSUPPNT.EXE
    • IFACE.EXE
    • IFW2000.EXE
    • INOCULATEIT.EXE
    • IOMON98.EXE
    • IPARMOR.EXE
    • IRIS.EXE
    • ISRV95.EXE
    • JAMMER.EXE
    • JEDI.EXE
    • KAV.EXE
    • KAVPF.EXE
    • KAVSVC.EXE
    • LDNETMON.EXE
    • LDPROMENU.EXE
    • LDSCAN.EXE
    • LOCALNET.EXE
    • LOCKDOWN.EXE
    • LOCKDOWN2000.EXE
    • LOOKOUT.EXE
    • LUALL.EXE
    • LUCOMSERVER.EXE
    • LUSPT.EXE
    • MCAFEE.EXE
    • MCAGENT.EXE
    • MCMNHDLR.EXE
    • MCSHIELD.EXE
    • MCSHIELDVVSTAT.EXE
    • MCTOOL.EXE
    • MCUPDATE.EXE
    • MCVSRTE.EXE
    • MCVSSHLD.EXE
    • MGAVRTCL.EXE
    • MGAVRTE.EXE
    • MGHTML.EXE
    • MGUI.EXE
    • MINILOG.EXE
    • MON.EXE
    • MONITOR.EXE
    • MONSYS32.EXE
    • MONSYSNT.EXE
    • MOOLIVE.EXE
    • MPFSERVICE.EXE
    • MPFTRAY.EXE
    • MRFLUX.EXE
    • MSINFO32.EXE
    • MWATCH.EXE
    • MXTASK.EXE
    • N32SCANW.EXE
    • NAV.EXE
    • NAV32.EXE
    • NAVALERT.EXE
    • NAVAP.EXE
    • NAVAPSVC.EXE
    • NAVAPW32.EXE
    • NAVDX.EXE
    • NAVENGNAVEX15.EXE
    • NAVLU32.EXE
    • NAVNT.EXE
    • NAVRUNR.EXE
    • NAVSTUB.EXE
    • NAVW32.EXE
    • NAVWNT.EXE
    • NC2000.EXE
    • NDD32.EXE
    • NEOMONITOR.EXE
    • NEOWATCHLOG.EXE
    • NET2000.EXE
    • NETARMOR.EXE
    • NETCOMMANDO.EXE
    • NETINFO.EXE
    • NETMON.EXE
    • NETPRO.EXE
    • NETPROTECT.EXE
    • NETSCANPRO.EXE
    • NETSTAT.EXE
    • NETUTILS.EXE
    • NETUTILS].EXE
    • NIMDA.EXE
    • NISSERV.EXE
    • NISUM.EXE
    • NISUMNISSERVNISUM.EXE
    • NMAIN.EXE
    • NOD32.EXE
    • NORMAN.EXE
    • NORMAN32.EXE
    • NORMANAV.EXE
    • NORMAN_32.EXE
    • NORMAN_AV.EXE
    • NORMIST.EXE
    • NORTON.EXE
    • NORTONAV.EXE
    • NORTON_AV.EXE
    • NOTSTART.EXE
    • NPFMESSENGER.EXE
    • NPFW.EXE
    • NPFW32.EXE
    • NPROTECT.EXE
    • NPSCHECK.EXE
    • NPSSVC.EXE
    • NRESQ32.EXE
    • NSCHED32.EXE
    • NSCHEDNT.EXE
    • NSPLUGIN.EXE
    • NTRTSCAN.EXE
    • NTVDM.EXE
    • NTXCONFIG.EXE
    • NUI.EXE
    • NUPGRADE.EXE
    • NVARCH16.EXE
    • NVC95.EXE
    • NVSVC32.EXE
    • NWSERVICE.EXE
    • NWTOOL16.EXE
    • OFFGUARD.EXE
    • OPSCAN.EXE
    • OSTRONET.EXE
    • OUTPOST.EXE
    • PADMIN.EXE
    • PANDA.EXE
    • PANDAAV.EXE
    • PANIXK.EXE
    • PAV.EXE
    • PAVCL.EXE
    • PAVPROXY.EXE
    • PAVSCHED.EXE
    • PAVW.EXE
    • PCCCLIENT.EXE
    • PCCGUIDE.EXE
    • PCCIOMON.EXE
    • PCCNTMON.EXE
    • PCCWIN97.EXE
    • PCCWIN98.EXE
    • PCFWALLICON.EXE
    • PCSCAN.EXE
    • PERISCOPE.EXE
    • PERSFW.EXE
    • PF2.EXE
    • PFWADMIN.EXE
    • PINGSCAN.EXE
    • PLATIN.EXE
    • POP3TRAP.EXE
    • POPROXY.EXE
    • PORTDETECTIVE.EXE
    • PORTMONITOR.EXE
    • PPINUPDT.EXE
    • PPTBC.EXE
    • PPVSTOP.EXE
    • PROCDUMP.EXE
    • PROCESSMONITOR.EXE
    • PROCEXPLORERV10#.EXE
    • PROGRAMAUDITOR.EXE
    • PROPORT.EXE
    • PROTECTX.EXE
    • PSPF.EXE
    • PURGE.EXE
    • PVIEW95.EXE
    • PW32.EXE
    • QCONSOLE.EXE
    • RAV.EXE
    • RAV7.EXE
    • RAV7WIN.EXE
    • REALMON.EXE
    • REGRUN2.EXE
    • RESCUE.EXE
    • RRGUARD.EXE
    • RSHELL.EXE
    • RTVSCN95.EXE
    • RULAUNCH.EXE
    • SAFEWEB.EXE
    • SAVSCAN.EXE
    • SBSERV.EXE
    • SBSERVICE.EXE
    • SCAN.EXE
    • SCAN32.EXE
    • SCAN95.EXE
    • SCANPM.EXE
    • SCRSCAN.EXE
    • SD.EXE
    • SENS.EXE
    • SERV95.EXE
    • SFC.EXE
    • SH.EXE
    • SHAREDACCESS.EXE
    • SHN.EXE
    • SMC.EXE
    • SOFI.EXE
    • SOPHOS.EXE
    • SOPHOSAV.EXE
    • SOPHOS_AV.EXE
    • SPF.EXE
    • SPHINX.EXE
    • SPY.EXE
    • SPYGATE.EXE
    • SPYX.EXE
    • SPYXX.EXE
    • SRWATCH.EXE
    • SS3EDIT.EXE
    • ST2.EXE
    • SUPFTRL.EXE
    • SUPP95.EXE
    • SUPPORTER5.EXE
    • SWEEP95.EXE
    • SWEEPNET.EXE
    • SWEEPSRV.SYS.EXE
    • SWEEPSRV.SYSVSHWIN32.EXE
    • SWNETSUP.EXE
    • SYMANTEC.EXE
    • SYMLCSVC.EXE
    • SYMPROXYSVC.EXE
    • SYMTRAY.EXE
    • SYSEDIT.EXE
    • TASKMON.EXE
    • TAUMON.EXE
    • TAUSCAN.EXE
    • TBSCAN.EXE
    • TC.EXE
    • TCA.EXE
    • TCM.EXE
    • TCTCA.EXE
    • TFAK.EXE
    • TFAK5.EXE
    • TGBOB.EXE
    • TITANIN.EXE
    • TITANINXP.EXE
    • TRENDMICRO.EXE
    • TRJSCAN.EXE
    • TROJANTRAP3.EXE
    • TRUEVECTOR.EXE
    • UNDOBOOT.EXE
    • UPDATE.EXE
    • VBCMSERV.EXE
    • VBCONS.EXE
    • VBUST.EXE
    • VBWIN9X.EXE
    • VBWINNTW.EXE
    • VCCMSERV.EXE
    • VCONTROL.EXE
    • VET32.EXE
    • VET95.EXE
    • VETTRAY.EXE
    • VIRUS.EXE
    • VIRUSMDPERSONALFIREWALL.EXE
    • VNLAN300.EXE
    • VNPC3000.EXE
    • VPC32.EXE
    • VPFW30S.EXE
    • VPTRAY.EXE
    • VSCAN40.EXE
    • VSCHED.EXE
    • VSECOMR.EXE
    • VSHWIN32.EXE
    • VSHWIN32VBCMSERV.EXE
    • VSMAIN.EXE
    • VSMON.EXE
    • VSSTAT.EXE
    • VSWIN9XE.EXE
    • VSWINNTSE.EXE
    • W9X.EXE
    • WATCHDOG.EXE
    • WEBSCANX.EXE
    • WEBTRAP.EXE
    • WFINDV32.EXE
    • WGFE95.EXE
    • WHOSWATCHINGME.EXE
    • WIMMUN32.EXE
    • WINRECON.EXE
    • WINROUTE.EXE
    • WINSFCM.EXE
    • WNT.EXE
    • WQKMM3878.EXE
    • WRADMIN.EXE
    • WRCTRL.EXE
    • WSBGATE.EXE
    • WYVERNWORKSFIREWALL.EXE
    • ZAPRO.EXE
    • ZATUTOR.EXE
    • ZAUINST.EXE
    • ZONALM2601.EXE
    • ZONEALARM.EXE
    • _AVP32.EXE
    • _AVPCC.EXE
    • _AVPM.EXE

  21. Opens a back door by contacting an IRC server on the x1.j0ker.nl domain through TCP port 8080. This back door allows a remote attacker to perform any of the following actions on the compromised computer:

    • Start and stop threads and processes
    • Start a SOCKS4 server
    • Run shell commands
    • Change IE start page
    • Flush DNS/ARP cache
    • Steal passwords from protected storage
    • Open and delete files
    • Download files
    • Perform a denial of service (DOS) attack
    • View and delete registry keys
    • Obtain System information such as CPU type, OS version, RAM, etc.

  22. Spreads by exploiting the following vulnerabilities:



Recommendations

Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
  • For further information on the terms used in this document, please refer to the Security Response glossary.

Writeup By: Rodney Andres

Discovered: October 19, 2005
Updated: February 13, 2007 12:45:41 PM
Type: Worm
Systems Affected: Windows


The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.

  1. Disable System Restore (Windows Me/XP).
  2. Update the virus definitions.
  3. Run a full system scan and delete all the files detected.
  4. Delete any values added to the registry.
  5. Reenable the SharedAccess service (Windows 2000/XP only).
For specific details on each of these steps, read the following instructions.

1. To disable System Restore (Windows Me/XP)
If you are running Windows Me or Windows XP, we recommend that you temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer.

Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file on your computer, even after you have cleaned the infected files from all the other locations.

Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat.

For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles:
Note:
When you are completely finished with the removal procedure and are satisfied that the threat has been removed, reenable System Restore by following the instructions in the aforementioned documents.

For additional information, and an alternative to disabling Windows Me System Restore, see the Microsoft Knowledge Base article: Antivirus Tools Cannot Clean Infected Files in the _Restore Folder (Article ID: Q263455).

2. To update the virus definitions
Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions:
  • Running LiveUpdate, which is the easiest way to obtain virus definitions: These virus definitions are posted to the LiveUpdate servers once each week (usually on Wednesdays), unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, refer to Virus Definitions (LiveUpdate).
  • Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted daily. You should download the definitions from the Symantec Security Response Web site and manually install them. To determine whether definitions for this threat are available by the Intelligent Updater, refer to Virus Definitions (Intelligent Updater).

    The latest Intelligent Updater virus definitions can be obtained here: Intelligent Updater virus definitions. For detailed instructions read the document: How to update virus definition files using the Intelligent Updater.


3. To scan for and delete the infected files
  1. Start your Symantec antivirus program and make sure that it is configured to scan all the files.
  2. Run a full system scan.
  3. If any files are detected, click Delete.

Important: If you are unable to start your Symantec antivirus product or the product reports that it cannot delete a detected file, you may need to stop the risk from running in order to remove it. To do this, run the scan in Safe mode. For instructions, read the document, How to start the computer in Safe Mode . Once you have restarted in Safe mode, run the scan again.

After the files are deleted, restart the computer in Normal mode and proceed with the next section.

Warning messages may be displayed when the computer is restarted, since the threat may not be fully removed at this point. You can ignore these messages and click OK. These messages will not appear when the computer is restarted after the removal instructions have been fully completed. The messages displayed may be similar to the following:

Title: [FILE PATH]
Message body: Windows cannot find [FILE NAME]. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search.


4. To delete the value from the registry
Important: Symantec strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify the specified subkeys only. For instructions refer to the document: How to make a backup of the Windows registry.
  1. Click Start > Run.
  2. Type regedit
  3. Click OK.

    Note: If the registry editor fails to open the threat may have modified the registry to prevent access to the registry editor. Security Response has developed a tool to resolve this problem. Download and run this tool, and then continue with the removal.

  4. Navigate to the subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole
    HKEY_CURRENT_USER\Software\Microsoft\OLE
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
    HKEY_CURRENT_USER\SYSTEM\CurrentControlSet\Control\Lsa
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunServices

  5. In the right pane, delete the value:

    "Windows Workstation Service" = "wkssvc.exe"

  6. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  7. In the right pane, delete the value:

    "gencroot" = "%Windir%\gencroot.exe"

  8. Navigate to the subkeys:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\Windows Workstation Service
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\Windows Workstation Service

  9. In the right pane, delete the value:

    "@" = "Service"

  10. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WINDOWS_WORKSTATION_SERVICE\0000\Control

  11. In the right pane, delete the value:

    "*NewlyCreated*" = "0"

  12. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WINDOWS_WORKSTATION_SERVICE\0000

  13. In the right pane, delete the values:

    "Service" = "Windows Workstation Service"
    "Legacy" = "1"
    "ConfigFlags" = "0"
    "Class" = "LegacyDriver"
    "ClassGUID" = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
    "DeviceDesc" = "Windows Workstation Service"
    "NextInstance" = "1"

  14. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Workstation Service\Enum

  15. In the right pane, delete the values:

    "0" = "Root\LEGACY_WINDOWS_WORKSTATION_SERVICE\0000"
    "Count" = "1"
    "NextInstance" = "1"

  16. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Workstation Service\Security

  17. In the right pane, delete the value:

    "Security" = "01 00 14 80 90 00 00 00 9C 00 00 00 14 00 00 00 30 00 00 00 02 00 1C 00 01 00 00 00 02 80 14 00 FF 01 0F 00 01 01 00 00 00 00 00 01 00 00 00 00 02 00 60 00 04 00 00 00 00 00 14 00 FD 01 02 00 01 01 00 00 00 00 00 05 12 00 00 00 00 00 18 00 FF 01 0F 00 01 02 00 00 00 00 00 05 20 00 00 00 20 02 00 00 00 00 14 00 8D 01 02 00 01 01 00 00 00 00 00 05 0B 00 00 00 00 00 18 00 FD 01 02 00 01 02 00 00 00 00 00 05 20 00 00 00 23 02 00 00 01 01 00 00 00 00 00 05 12 00 00 00 01 01 00 00 00 00 00 05 12 00 00 00"

  18. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Workstation Service

  19. In the right pane, delete the values:

    "Type" = "10"
    "Start" = "2"
    "ErrorControl" = "0"
    "ImagePath" = "%Windir%\gencroot.exe"
    "DisplayName" = "Windows Workstation Service"
    "ObjectName" = "LocalSystem"
    "Description" = "TurkSpy for Nt RootKit"

  20. Navigate to the subkey:

    HKEY_CURRENT_USER\Software\Kazaa\LocalContent

  21. In the right pane, delete the value:

    "Dir0" = "%PROGRAMFILES%\Programs"

  22. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\Software\Microsoft\OLE

  23. In the right pane, reset the value:

    "EnableDCOM" = "N"

  24. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa

  25. In the right pane, reset the value:

    "restrictanonymous" = "1"

  26. Exit the Registry Editor.

5. To reenable the SharedAccess service (Windows 2000/XP only)
The SharedAccess service is responsible for maintaining Internet Connection Sharing and the Windows Firewall/Internet Connection Firewall applications in Windows. (The presence and names of these applications vary depending on the operating system and service pack you are using.) To protect your computer and maintain network functionality, re-enable this service if you are using any of these programs.


Windows XP Service Pack 2
If you are running Windows XP with Service Pack 2 and are using the Windows Firewall, the operating system will alert you when the SharedAccess service is stopped, by displaying an alert balloon saying that your Firewall status is unknown. Perform the following steps to ensure that the Windows Firewall is re-enabled:
  1. Click Start > Control Panel.

  2. Double-click the Security Center.

  3. Ensure that the Firewall security essential is marked ON.

    Note: If the Firewall security essential is marked on, your Windows Firewall is on and you do not need to continue with these steps.

    If the Firewall security essential is not marked on, click the "Recommendations" button.

  4. Under "Recommendations," click Enable Now. A window appears telling you that the Windows Firewall was successfully turned on.

  5. Click Close, and then click OK.

  6. Close the Security Center.


Windows 2000 or Windows XP Service Pack 1 or earlier
Complete the following steps to re-enable the SharedAccess service:
  1. Click Start > Run.
  2. Type services.msc

    Then click OK.

  3. Do one of the following:
    • Windows 2000: Under the Name column, locate the "Internet Connection Sharing (ICS)" service and double-click it.
    • Windows XP: Under the Named column, locate the "Internet Connection Firewall (ICF) / Internet Connection Sharing (ICS)" service and double-click it.

  4. Under "Startup Type:", select "Automatic" from the drop-down menu.

  5. Under "Service Status:", click the Start button.

  6. Once the service has completed starting, click OK.

  7. Close the Services window.


Writeup By: Rodney Andres