W32.Gaobot.ADV

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Discovered: April 22, 2004
Updated: February 13, 2007 12:21:50 PM
Type: Worm
Systems Affected: Windows


W32.Gaobot.ADV is a minor variant of W32.Gaobot.SY. This worm attempts to spread through network shares that have weak passwords and allows attackers to access an infected computer using a predetermined IRC channel.

The worm uses multiple vulnerabilities to spread, including:


This threat may be compressed with UPX and Yoda.

Antivirus Protection Dates

  • Initial Rapid Release version April 23, 2004
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version April 23, 2004
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date April 28, 2004

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

Writeup By: Yana Liu

Discovered: April 22, 2004
Updated: February 13, 2007 12:21:50 PM
Type: Worm
Systems Affected: Windows


When W32.Gaobot.ADV runs, it does the following:

  1. Copies itself to the %System% folder. The file name may vary.

    For example, it may copy itself as %System%\nwiz.exe.


    Note: %System% is a variable. The worm locates the System folder and copies itself to that location. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).


  2. Adds the value:
    • "Norton Wizzard"="nwiz.exe"
    • Or a value that refers to the file copied by the worm

      to the registry keys:
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
      Run
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
      RunServices

      so that the worm runs when you start Windows.

  3. Deletes the values:
    • "Ssate.exe"
    • "rate.exe"
    • "d3dupdate.exe"
    • "TaskMon"
    • "Explorer"

      from the registry key:

      HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  4. Terminates the following processes:
    • irun4.exe
    • i11r54n4.exe
    • winsys.exe
    • bbeagle.exe
    • taskmon.exe

  5. Deletes the following files:
    • %System%\irun4.exe
    • %System%\i11r54n4.exe
    • %System%\winsys.exe
    • %System%\bbeagle.exe
    • %System%\taskmon.exe

  6. Deletes the service "Upnphost."

  7. Terminates a large number of processes. Refer to "Processes" at the end of this "Technical Details" section for a complete list of process names.

  8. Adds the following lines to the %System%\drivers\etc\hosts file, so that any attempts to connect to these Web sites fail:

    127.0.0.1     www.trendmicro.com
    127.0.0.1     trendmicro.com
    127.0.0.1     rads.mcafee.com
    127.0.0.1     us.mcafee.com
    127.0.0.1     www.nai.com
    127.0.0.1     nai.com
    127.0.0.1     secure.nai.com
    127.0.0.1     dispatch.mcafee.com
    127.0.0.1     download.mcafee.com
    127.0.0.1     www.my-etrust.com
    127.0.0.1     my-etrust.com
    127.0.0.1     mast.mcafee.com
    127.0.0.1     ca.com
    127.0.0.1     www.ca.com
    127.0.0.1     networkassociates.com
    127.0.0.1     www.networkassociates.com
    127.0.0.1     avp.com
    127.0.0.1     www.kaspersky.com
    127.0.0.1     www.avp.com
    127.0.0.1     kaspersky.com
    127.0.0.1     www.f-secure.com
    127.0.0.1     f-secure.com
    127.0.0.1     viruslist.com
    127.0.0.1     www.viruslist.com
    127.0.0.1     mcafee.com
    127.0.0.1     www.mcafee.com
    127.0.0.1     sophos.com
    127.0.0.1     www.sophos.com
    127.0.0.1     updates.symantec.com
    127.0.0.1     update.symantec.com
    127.0.0.1     customer.symantec.com
    127.0.0.1     liveupdate.symantec.com
    127.0.0.1     symantec.com
    127.0.0.1     securityresponse.symantec.com
    127.0.0.1     www.symantec.com
    127.0.0.1     liveupdate.symantecliveupdate.com

  9. Attempts to spread to other computers using a number of methods, including:
    • Sending itself to the backdoor ports that the Beagle and Mydoom families of worms open
    • Using the WebDAV vulnerability
    • Using the RPC DCOM vulnerability
    • Using the Workstation service buffer overrun vulnerability
    • Using the Microsoft Messenger Service Buffer Overrun Vulnerability
    • Using the UPnP vulnerability
    • Using the Locator service vulnerability
    • Using the vulnerabilities in the Microsoft SQL Server 2000 or MSDE 2000 audit

  10. Starts an FTP server on a randomly selected TCP port.

  11. Connects to an IRC channel and waits for the commands. The worm recognizes a large number of commands and can be instructed to (among other things):
    • Download and upload files via FTP and HTTP
    • Run commands
    • List and terminate processes
    • List and terminate services
    • Restart the computer
    • Perform HTTP, ICMP, SYN, and UDP floods
    • Retrieve email addresses stored on the computer
    • Retrieve a list of email addresses via HTTP
    • Retrieve a given URL
    • Measure the speed of an infected computer's Internet connection, by sending HTTP GET requests to the following hosts:
      • yahoo.co.jp
      • www.nifty.com
      • www.d1asia.com
      • www.st.lib.keio.ac.jp
      • www.lib.nthu.edu.tw
      • www.above.net
      • www.level3.com
      • nitro.ucsc.edu
      • www.burst.net
      • www.cogentco.com
      • www.rit.edu
      • www.nocster.com
      • www.verio.com
      • www.stanford.edu
      • www.xo.net
      • de.yahoo.com
      • www.belwue.de
      • www.switch.ch
      • www.1und1.de
      • verio.fr
      • www.utwente.nl
      • www.schlund.net

    • Sniff HTTP, FTP, and IRC traffic
    • Disable other worms by deleting their files, associated registry values, and by terminating their processes.

  12. Steals the Windows product ID and the CD keys of some games.

  13. Tries to copy itself to other computers through the following shares:
  • c$
  • d$
  • e$
  • print$
  • admin$
    using the following user names and passwords, as well as any user names found using NetUserEnum():

    User names:
      • aaa
      • abc
      • Admin
      • admin
      • administrador
      • Administrador
      • Administrat
      • Administrateur
      • Administrator
      • administrator
      • admins
      • asdf
      • bill
      • colin
      • computer
      • Convidado
      • Coordinatore
      • database
      • Default
      • Dell
      • dick
      • erik
      • Gast
      • george
      • Guest
      • home
      • Inviter
      • jim
      • kanri
      • kanri-sha
      • karl
      • kate
      • mark
      • mary
      • mgmt
      • mike
      • mypc
      • mysql
      • OEM
      • Ospite
      • Owner
      • OWNER
      • owner
      • patrick
      • peter
      • qwer
      • root
      • server
      • sql
      • stacey
      • stacy
      • Standard
      • stefan
      • steve
      • steven
      • student
      • teacher
      • temp
      • Test
      • tim
      • tom
      • user
      • User
      • Verwalter
      • win
      • wwwadmin
      • xyz

        Passwords:
      • !@#$
      • !@#$%
      • !@#$%^
      • !@#$%^&
      • !@#$%^&*
      • 000000
      • 00000000
      • 007
      • 110
      • 111
      • 111111
      • 11111111
      • 121212
      • 123
      • 123123
      • 1234
      • 12345
      • 123456
      • 1234567
      • 12345678
      • 123456789
      • 1234qwer
      • 123abc
      • 123asd
      • 123qwe
      • 1776
      • 1778
      • 2002
      • 2004
      • 2525
      • 2600
      • 54321
      • 654321
      • 666
      • 88888888
      • aaa
      • abc
      • abc123
      • abcd
      • ACCESS
      • Admin
      • admin
      • admin$
      • admin123
      • administrador
      • Administrador
      • Administrat
      • Administrateur
      • ADMINISTRATOR
      • Administrator
      • administrator
      • admins
      • alpha
      • ami
      • amie
      • asdf
      • asdfgh
      • asdfghjkl
      • askaban
      • ASP
      • athlon
      • azerty
      • azkaban
      • baby
      • backdoor
      • BACKUP
      • beer
      • biere
      • bill
      • bong
      • BOX
      • box
      • Box
      • buckbeak
      • c$=c:
      • carte
      • cauldron
      • cederom
      • changeme
      • CNN
      • colin
      • computer
      • Convidado
      • Coordinatore
      • copin
      • copine
      • cran
      • crash
      • d$=d:
      • database
      • Default
      • Dell
      • dementor
      • devil
      • dick
      • dope
      • drugs
      • dude
      • dumbledore
      • e$=e:
      • ecran
      • enable
      • erik
      • fanny
      • feds
      • fish
      • foobar
      • fool
      • freak
      • fucked
      • Gast
      • gay
      • george
      • god
      • godblessyou
      • gryffindor
      • Guest
      • hagrid
      • harry
      • hax
      • hermine
      • hermione
      • hogwarts
      • home
      • homework
      • idiot
      • ihavenopass
      • imprimeur
      • Internet
      • Inviter
      • ipc$
      • iraq
      • jackdaniels
      • jim
      • kanri
      • kanri-sha
      • karl
      • kate
      • kids
      • leet
      • linux
      • LOCAL
      • Login
      • lol
      • love
      • madre
      • mark
      • mary
      • merde
      • metal
      • mgmt
      • mike
      • mince
      • moonshine
      • mouse
      • mybaby
      • mybox
      • mypass
      • mypc
      • mysql
      • newfie
      • newfy
      • noob
      • OEM
      • oil
      • opteron
      • oracle
      • ordinateur
      • Ospite
      • own
      • owned
      • Owner
      • OWNER
      • owner
      • pass
      • passwd
      • PASSWD
      • password
      • Password
      • password123
      • pat
      • patrick
      • penis
      • peter
      • PHP
      • poiut
      • poiuytrewq
      • porn
      • potter
      • private
      • pussy
      • pwd
      • pwned
      • quidditch
      • qwer
      • qwerty
      • qwertyuiop
      • r00t
      • red123
      • reseau
      • rom
      • ROOT
      • root
      • rooted
      • school
      • secret
      • secrets
      • server
      • SERVER
      • sex
      • share
      • souris
      • sql
      • stacey
      • stacy
      • Standard
      • stefan
      • steve
      • steven
      • student
      • super
      • superman
      • supersecret
      • switch
      • sybase
      • SYSTEM
      • teacher
      • TEMP
      • temp
      • tennessee
      • Tennessee
      • TEST
      • Test
      • test123
      • Texas
      • texas
      • tim
      • tom
      • UNIX
      • user
      • User
      • Usernames:
      • vagina
      • Verwalter
      • Washington
      • washington
      • werty
      • west
      • West
      • wh0re
      • whiskey
      • whisky
      • whore
      • win
      • windows2k
      • windows98
      • windowsME
      • WindowsXP
      • windoze
      • wmd
      • work
      • wwwadmin
      • xxx
      • xxyyzz
      • xyz
      • yxcv
      • zxcv
      • zxcvbnm


Processes
W32.Gaobot.ADV attempts to terminate the following processes, mentioned in step 7:
    • _AVP32.EXE
    • _AVPCC.EXE
    • _AVPM.EXE
    • ACKWIN32.EXE
    • ADAWARE.EXE
    • ADVXDWIN.EXE
    • AGENTSVR.EXE
    • AGENTW.EXE
    • ALERTSVC.EXE
    • ALEVIR.EXE
    • ALOGSERV.EXE
    • AMON9X.EXE
    • ANTI-TROJAN.EXE
    • ANTIVIRUS.EXE
    • ANTS.EXE
    • APIMONITOR.EXE
    • APLICA32.EXE
    • APVXDWIN.EXE
    • ARR.EXE
    • ATCON.EXE
    • ATGUARD.EXE
    • ATRO55EN.EXE
    • ATWATCH.EXE
    • AU.EXE
    • AUPDATE.EXE
    • AUTODOWN.EXE
    • AUTO-PROTECT.NAV80TRY.EXE
    • AUTOTRACE.EXE
    • AUTOUPDATE.EXE
    • AVCONSOL.EXE
    • AVE32.EXE
    • AVGCC32.EXE
    • AVGCTRL.EXE
    • AVGNT.EXE
    • AVGSERV.EXE
    • AVGSERV9.EXE
    • AVGUARD.EXE
    • AVGW.EXE
    • AVKPOP.EXE
    • AVKSERV.EXE
    • AVKSERVICE.EXE
    • AVKWCTl9.EXE
    • AVLTMAIN.EXE
    • AVNT.EXE
    • AVP.EXE
    • AVP32.EXE
    • AVPCC.EXE
    • AVPDOS32.EXE
    • AVPM.EXE
    • AVPTC32.EXE
    • AVPUPD.EXE
    • AVSCHED32.EXE
    • AVSYNMGR.EXE
    • AVWIN95.EXE
    • AVWINNT.EXE
    • AVWUPD.EXE
    • AVWUPD32.EXE
    • AVWUPSRV.EXE
    • AVXMONITOR9X.EXE
    • AVXMONITORNT.EXE
    • AVXQUAR.EXE
    • BACKWEB.EXE
    • BARGAINS.EXE
    • BD_PROFESSIONAL.EXE
    • BEAGLE.EXE
    • BELT.EXE
    • BIDEF.EXE
    • BIDSERVER.EXE
    • BIPCP.EXE
    • BIPCPEVALSETUP.EXE
    • BISP.EXE
    • BLACKD.EXE
    • BLACKICE.EXE
    • BLSS.EXE
    • BOOTCONF.EXE
    • BOOTWARN.EXE
    • BORG2.EXE
    • BPC.EXE
    • BRASIL.EXE
    • BS120.EXE
    • BUNDLE.EXE
    • BVT.EXE
    • CCAPP.EXE
    • CCEVTMGR.EXE
    • CCPXYSVC.EXE
    • CDP.EXE
    • CFD.EXE
    • CFGWIZ.EXE
    • CFIADMIN.EXE
    • CFIAUDIT.EXE
    • CFINET.EXE
    • CFINET32.EXE
    • Claw95.EXE
    • CLAW95CF.EXE
    • CLEAN.EXE
    • CLEANER.EXE
    • CLEANER3.EXE
    • CLEANPC.EXE
    • CLICK.EXE
    • CMD32.EXE
    • CMESYS.EXE
    • CMGRDIAN.EXE
    • CMON016.EXE
    • CONNECTIONMONITOR.EXE
    • CPD.EXE
    • CPF9X206.EXE
    • CPFNT206.EXE
    • CTRL.EXE
    • CV.EXE
    • CWNB181.EXE
    • CWNTDWMO.EXE
    • DATEMANAGER.EXE
    • DCOMX.EXE
    • DEFALERT.EXE
    • DEFSCANGUI.EXE
    • DEFWATCH.EXE
    • DEPUTY.EXE
    • DIVX.EXE
    • DLLCACHE.EXE
    • DLLREG.EXE
    • DOORS.EXE
    • DPF.EXE
    • DPFSETUP.EXE
    • DPPS2.EXE
    • DRWATSON.EXE
    • DRWEB32.EXE
    • DRWEBUPW.EXE
    • DSSAGENT.EXE
    • DVP95.EXE
    • DVP95_0.EXE
    • ECENGINE.EXE
    • EFPEADM.EXE
    • EMSW.EXE
    • ENT.EXE
    • ESAFE.EXE
    • ESCANH95.EXE
    • ESCANHNT.EXE
    • ESCANV95.EXE
    • ESPWATCH.EXE
    • ETHEREAL.EXE
    • ETRUSTCIPE.EXE
    • EVPN.EXE
    • EXANTIVIRUS-CNET.EXE
    • EXE.AVXW.EXE
    • EXPERT.EXE
    • EXPLORE.EXE
    • F-AGNT95.EXE
    • F-AGOBOT.EXE
    • FAMEH32.EXE
    • FAST.EXE
    • FCH32.EXE
    • FIH32.EXE
    • FINDVIRU.EXE
    • FIREWALL.EXE
    • FLOWPROTECTOR.EXE
    • FNRB32.EXE
    • FPROT.EXE
    • F-PROT.EXE
    • F-PROT95.EXE
    • FP-WIN.EXE
    • FP-WIN_TRIAL.EXE
    • FRW.EXE
    • FSAA.EXE
    • FSAV.EXE
    • FSAV32.EXE
    • FSAV530STBYB.EXE
    • FSAV530WTBYB.EXE
    • FSAV95.EXE
    • FSGK32.EXE
    • FSM32.EXE
    • FSMA32.EXE
    • FSMB32.EXE
    • F-STOPW.EXE
    • GATOR.EXE
    • GBMENU.EXE
    • GBPOLL.EXE
    • GENERICS.EXE
    • GMT.EXE
    • GUARD.EXE
    • GUARDDOG.EXE
    • HACKTRACERSETUP.EXE
    • HBINST.EXE
    • HBSRV.EXE
    • HIJACKTHIS.EXE
    • HOTACTIO.EXE
    • HOTPATCH.EXE
    • HTLOG.EXE
    • HTPATCH.EXE
    • HWPE.EXE
    • HXDL.EXE
    • HXIUL.EXE
    • IAMAPP.EXE
    • IAMSERV.EXE
    • IAMSTATS.EXE
    • IBMASN.EXE
    • IBMAVSP.EXE
    • ICLOAD95.EXE
    • ICLOADNT.EXE
    • ICMON.EXE
    • ICSUPP95.EXE
    • ICSUPPNT.EXE
    • IDLE.EXE
    • IEDLL.EXE
    • IEDRIVER.EXE
    • IEXPLORER.EXE
    • IFACE.EXE
    • IFW2000.EXE
    • INETLNFO.EXE
    • INFUS.EXE
    • INFWIN.EXE
    • INIT.EXE
    • INTDEL.EXE
    • INTREN.EXE
    • IOMON98.EXE
    • IPARMOR.EXE
    • IRIS.EXE
    • ISASS.EXE
    • ISRV95.EXE
    • ISTSVC.EXE
    • JAMMER.EXE
    • JDBGMRG.EXE
    • JEDI.EXE
    • KAVLITE40ENG.EXE
    • KAVPERS40ENG.EXE
    • KAVPF.EXE
    • KAZZA.EXE
    • KEENVALUE.EXE
    • KERIO-PF-213-EN-WIN.EXE
    • KERIO-WRL-421-EN-WIN.EXE
    • KERIO-WRP-421-EN-WIN.EXE
    • KERNEL32.EXE
    • KILLPROCESSSETUP161.EXE
    • LAUNCHER.EXE
    • LDNETMON.EXE
    • LDPRO.EXE
    • LDPROMENU.EXE
    • LDSCAN.EXE
    • LNETINFO.EXE
    • LOADER.EXE
    • LOCALNET.EXE
    • LOCKDOWN.EXE
    • LOCKDOWN2000.EXE
    • LOOKOUT.EXE
    • LORDPE.EXE
    • LSETUP.EXE
    • LUALL.EXE
    • LUAU.EXE
    • LUCOMSERVER.EXE
    • LUINIT.EXE
    • LUSPT.EXE
    • MAPISVC32.EXE
    • MCAGENT.EXE
    • MCMNHDLR.EXE
    • MCSHIELD.EXE
    • MCTOOL.EXE
    • MCUPDATE.EXE
    • MCVSRTE.EXE
    • MCVSSHLD.EXE
    • MD.EXE
    • MFIN32.EXE
    • MFW2EN.EXE
    • MFWENG3.02D30.EXE
    • MGAVRTCL.EXE
    • MGAVRTE.EXE
    • MGHTML.EXE
    • MGUI.EXE
    • MINILOG.EXE
    • MMOD.EXE
    • MONITOR.EXE
    • MOOLIVE.EXE
    • MOSTAT.EXE
    • MPFAGENT.EXE
    • MPFSERVICE.EXE
    • MPFTRAY.EXE
    • MRFLUX.EXE
    • MSAPP.EXE
    • MSBB.EXE
    • MSBLAST.EXE
    • MSCACHE.EXE
    • MSCCN32.EXE
    • MSCMAN.EXE
    • MSCONFIG.EXE
    • MSDM.EXE
    • MSDOS.EXE
    • MSIEXEC16.EXE
    • MSINFO32.EXE
    • MSLAUGH.EXE
    • MSMGT.EXE
    • MSMSGRI32.EXE
    • MSSMMC32.EXE
    • MSSYS.EXE
    • MSVXD.EXE
    • MU0311AD.EXE
    • MWATCH.EXE
    • N32SCANW.EXE
    • NAV.EXE
    • NAVAP.NAVAPSVC.EXE
    • NAVAPSVC.EXE
    • NAVAPW32.EXE
    • NAVDX.EXE
    • NAVENGNAVEX15.NAVLU32.EXE
    • NAVLU32.EXE
    • NAVNT.EXE
    • NAVSTUB.EXE
    • NAVW32.EXE
    • NAVWNT.EXE
    • NC2000.EXE
    • NCINST4.EXE
    • NDD32.EXE
    • NEOMONITOR.EXE
    • NEOWATCHLOG.EXE
    • NETARMOR.EXE
    • NETD32.EXE
    • NETINFO.EXE
    • NETMON.EXE
    • NETSCANPRO.EXE
    • NETSPYHUNTER-1.2.EXE
    • NETSTAT.EXE
    • NETUTILS.EXE
    • NISSERV.EXE
    • NISUM.EXE
    • NMAIN.EXE
    • NOD32.EXE
    • NORMIST.EXE
    • NORTON_INTERNET_SECU_3.0_407.EXE
    • NOTSTART.EXE
    • NPF40_TW_98_NT_ME_2K.EXE
    • NPFMESSENGER.EXE
    • NPROTECT.EXE
    • NPSCHECK.EXE
    • NPSSVC.EXE
    • NSCHED32.EXE
    • NSSYS32.EXE
    • NSTASK32.EXE
    • NSUPDATE.EXE
    • NT.EXE
    • NTRTSCAN.EXE
    • NTVDM.EXE
    • NTXconfig.EXE
    • NUI.EXE
    • NUPGRADE.EXE
    • NVARCH16.EXE
    • NVC95.EXE
    • NVSVC32.EXE
    • NWINST4.EXE
    • NWSERVICE.EXE
    • NWTOOL16.EXE
    • OLLYDBG.EXE
    • ONSRVR.EXE
    • OPTIMIZE.EXE
    • OSTRONET.EXE
    • OTFIX.EXE
    • OUTPOST.EXE
    • OUTPOSTINSTALL.EXE
    • OUTPOSTPROINSTALL.EXE
    • PADMIN.EXE
    • PANIXK.EXE
    • PATCH.EXE
    • PAVCL.EXE
    • PAVPROXY.EXE
    • PAVSCHED.EXE
    • PAVW.EXE
    • PCC2002S902.EXE
    • PCC2K_76_1436.EXE
    • PCCIOMON.EXE
    • PCCNTMON.EXE
    • PCCWIN97.EXE
    • PCCWIN98.EXE
    • PCDSETUP.EXE
    • PCFWALLICON.EXE
    • PCIP10117_0.EXE
    • PCSCAN.EXE
    • PDSETUP.EXE
    • PENIS.EXE
    • PERISCOPE.EXE
    • PERSFW.EXE
    • PERSWF.EXE
    • PF2.EXE
    • PFWADMIN.EXE
    • PGMONITR.EXE
    • PINGSCAN.EXE
    • PLATIN.EXE
    • POP3TRAP.EXE
    • POPROXY.EXE
    • POPSCAN.EXE
    • PORTDETECTIVE.EXE
    • PORTMONITOR.EXE
    • POWERSCAN.EXE
    • PPINUPDT.EXE
    • PPTBC.EXE
    • PPVSTOP.EXE
    • PRIZESURFER.EXE
    • PRMT.EXE
    • PRMVR.EXE
    • PROCDUMP.EXE
    • PROCESSMONITOR.EXE
    • PROCEXPLORERV1.0.EXE
    • PROGRAMAUDITOR.EXE
    • PROPORT.EXE
    • PROTECTX.EXE
    • PSPF.EXE
    • PURGE.EXE
    • PUSSY.EXE
    • PVIEW95.EXE
    • QCONSOLE.EXE
    • QSERVER.EXE
    • RAPAPP.EXE
    • RAV7.EXE
    • RAV7WIN.EXE
    • RAV8WIN32ENG.EXE
    • RAY.EXE
    • RB32.EXE
    • RCSYNC.EXE
    • REALMON.EXE
    • REGED.EXE
    • REGEDIT.EXE
    • REGEDT32.EXE
    • RESCUE.EXE
    • RESCUE32.EXE
    • RRGUARD.EXE
    • RSHELL.EXE
    • RTVSCAN.EXE
    • RTVSCN95.EXE
    • RULAUNCH.EXE
    • RUN32DLL.EXE
    • RUNDLL.EXE
    • RUNDLL16.EXE
    • RUXDLL32.EXE
    • SAFEWEB.EXE
    • SAHAGENT.EXE
    • SAVE.EXE
    • SAVENOW.EXE
    • SBSERV.EXE
    • SC.EXE
    • SCAM32.EXE
    • SCAN32.EXE
    • SCAN95.EXE
    • SCANPM.EXE
    • SCRSCAN.EXE
    • SCRSVR.EXE
    • SCVHOST.EXE
    • SD.EXE
    • SERV95.EXE
    • SERVICE.EXE
    • SERVLCE.EXE
    • SERVLCES.EXE
    • SETUP_FLOWPROTECTOR_US.EXE
    • SETUPVAMEEVAL.EXE
    • SFC.EXE
    • SGSSFW32.EXE
    • SH.EXE
    • SHELLSPYINSTALL.EXE
    • SHN.EXE
    • SHOWBEHIND.EXE
    • SMC.EXE
    • SMS.EXE
    • SMSS32.EXE
    • SOAP.EXE
    • SOFI.EXE
    • SPERM.EXE
    • SPF.EXE
    • SPHINX.EXE
    • SPOLER.EXE
    • SPOOLCV.EXE
    • SPOOLSV32.EXE
    • SPYXX.EXE
    • SREXE.EXE
    • SRNG.EXE
    • SS3EDIT.EXE
    • SSG_4104.EXE
    • SSGRATE.EXE
    • ST2.EXE
    • START.EXE
    • STCLOADER.EXE
    • SUPFTRL.EXE
    • SUPPORT.EXE
    • SUPPORTER5.EXE
    • SVC.EXE
    • SVCHOSTC.EXE
    • SVCHOSTS.EXE
    • SVSHOST.EXE
    • SWEEP95.EXE
    • SWEEPNET.SWEEPSRV.SYS.SWNETSUP.EXE
    • SYMPROXYSVC.EXE
    • SYMTRAY.EXE
    • SYSEDIT.EXE
    • SYSTEM.EXE
    • SYSTEM32.EXE
    • SYSUPD.EXE
    • TASKMG.EXE
    • TASKMO.EXE
    • TASKMON.EXE
    • TAUMON.EXE
    • TBSCAN.EXE
    • TC.EXE
    • TCA.EXE
    • TCM.EXE
    • TDS2-98.EXE
    • TDS2-NT.EXE
    • TDS-3.EXE
    • TEEKIDS.EXE
    • TFAK.EXE
    • TFAK5.EXE
    • TGBOB.EXE
    • TITANIN.EXE
    • TITANINXP.EXE
    • TRACERT.EXE
    • TRICKLER.EXE
    • TRJSCAN.EXE
    • TRJSETUP.EXE
    • TROJANTRAP3.EXE
    • TSADBOT.EXE
    • TVMD.EXE
    • TVTMD.EXE
    • UNDOBOOT.EXE
    • UPDAT.EXE
    • UPDATE.EXE
    • UPGRAD.EXE
    • UTPOST.EXE
    • VBCMSERV.EXE
    • VBCONS.EXE
    • VBUST.EXE
    • VBWIN9X.EXE
    • VBWINNTW.EXE
    • VCSETUP.EXE
    • VET32.EXE
    • VET95.EXE
    • VETTRAY.EXE
    • VFSETUP.EXE
    • VIR-HELP.EXE
    • VIRUSMDPERSONALFIREWALL.EXE
    • VNLAN300.EXE
    • VNPC3000.EXE
    • VPC32.EXE
    • VPC42.EXE
    • VPFW30S.EXE
    • VPTRAY.EXE
    • VSCAN40.EXE
    • VSCENU6.02D30.EXE
    • VSCHED.EXE
    • VSECOMR.EXE
    • VSHWIN32.EXE
    • VSISETUP.EXE
    • VSMAIN.EXE
    • VSMON.EXE
    • VSSTAT.EXE
    • VSWIN9XE.EXE
    • VSWINNTSE.EXE
    • VSWINPERSE.EXE
    • W32DSM89.EXE
    • W9X.EXE
    • WATCHDOG.EXE
    • WEBDAV.EXE
    • WEBSCANX.EXE
    • WEBTRAP.EXE
    • WFINDV32.EXE
    • WGFE95.EXE
    • WHOSWATCHINGME.EXE
    • WIMMUN32.EXE
    • WIN32.EXE
    • WIN32US.EXE
    • WINACTIVE.EXE
    • WIN-BUGSFIX.EXE
    • WINDOW.EXE
    • WINDOWS.EXE
    • WININETD.EXE
    • WININIT.EXE
    • WININITX.EXE
    • WINLOGIN.EXE
    • WINMAIN.EXE
    • WINNET.EXE
    • WINPPR32.EXE
    • WINRECON.EXE
    • WINSERVN.EXE
    • WINSSK32.EXE
    • WINSTART.EXE
    • WINSTART001.EXE
    • WINTSK32.EXE
    • WINUPDATE.EXE
    • WKUFIND.EXE
    • WNAD.EXE
    • WNT.EXE
    • WRADMIN.EXE
    • WRCTRL.EXE
    • WSBGATE.EXE
    • WUPDATER.EXE
    • WUPDT.EXE
    • WYVERNWORKSFIREWALL.EXE
    • XPF202EN.EXE
    • ZAPRO.EXE
    • ZAPSETUP3001.EXE
    • ZATUTOR.EXE
    • ZONALM2601.EXE
    • ZONEALARM.EXE


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: Yana Liu

Discovered: April 22, 2004
Updated: February 13, 2007 12:21:50 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. Restart the computer in Safe mode or VGA mode.
  3. Restore the Hosts file.
  4. Update the virus definitions.
  5. Run a full system scan and delete all the files detected as W32.Gaobot.ADV.
  6. Reverse changes to the registry.
For details on each of these steps, read the following instructions.


Before you begin:
If you are running Windows NT/2000/XP, make sure that you do, or have done, the following:
  • Create a secure password. This threat takes advantage of weak network passwords. (A full-time Internet connection, such as DSL or Cable, is considered a network connection for these purposes.)
  • Patch the DCOM RPC vulnerability as described in Microsoft Security Bulletin MS03-026.
  • Patch the WebDav vulnerability as described in Microsoft Security Bulletin MS03-007.



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, re-enable 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 restart the computer in Safe mode or VGA mode

Shut down the computer and turn off the power. Wait for at least 30 seconds, and then restart the computer in Safe mode or VGA mode.

  • For Windows 95, 98, Me, 2000, or XP users, restart the computer in Safe mode. For instructions, read the document, "How to start the computer in Safe Mode."
  • For Windows NT 4 users, restart the computer in VGA mode.

3. To restore the Windows Hosts file


Note: The location of the Hosts file may vary, and some computers may not have this file.

For example, if the file exists in Windows 98, it will usually be in C:\Windows; and it is located in the C:\WINNT\system32\drivers\etc folder in Windows 2000. There may also be multiple copies of this file in different locations.

Follow the instructions for your operating system:
  • Windows 95/98/Me/NT/2000
    1. Click Start, point to Find or Search, and then click Files or Folders.
    2. Make sure that "Look in" is set to (C:) and that "Include subfolders" is checked.
    3. In the "Named" or "Search for..." box, type:

      hosts

    4. Click Find Now or Search Now.
    5. For each one that you find, note its location. (This is displayed in the "In Folder" column.)
    6. Right-click each file, and then click "Open With."
    7. Deselect the "Always use this program to open this program" check box.
    8. Scroll through the list of programs and double-click Notepad.
    9. When the file opens, delete all the entries in the Hosts file, except for the following line:

      127.0.0.1     localhost

    10. Close Notepad and save your changes when prompted.

  • Windows XP
    1. Click Start, and then click Search.
    2. Click All files and folders.
    3. In the "All or part of the file name" box, type:

      hosts

    4. Verify that "Look in" is set to "Local Hard Drives" or to (C:).
    5. Click "More advanced options."
    6. Check "Search system folders."
    7. Check "Search subfolders."
    8. Click Search.
    9. Click Find Now or Search Now.
    10. For each one that you find, note its location. (This is displayed in the "In Folder" column.)
    11. Right-click each file, and then click "Open With."
    12. Deselect the "Always use this program to open this program" check box.
    13. Scroll through the list of programs and double-click Notepad.
    14. When the file opens, delete all the entries in the Hosts file except for the following line:

      127.0.0.1     localhost

    15. Close Notepad and save your changes when prompted.


4. 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 the Virus Definitions (LiveUpdate).
  • Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted on U.S. business days (Monday through Friday). 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 the Virus Definitions (Intelligent Updater).

    The Intelligent Updater virus definitions are available: Read "How to update virus definition files using the Intelligent Updater" for detailed instructions.

5. 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 as W32.Gaobot.ADV, write down the location and file names, and then click Delete.

6. To reverse the changes made to the registry


WARNING: 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 keys only. Read the document, "How to make a backup of the Windows registry ," for instructions.
  1. Click Start, and then click Run. (The Run dialog box appears.)
  2. Type regedit

    Then click OK. (The Registry Editor opens.)

  3. Navigate to each of the following keys:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\
    Run
    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\
    RunServices

  4. In the right pane, delete:

    "Norton Wizzard"="nwiz.exe"

    or any value that refers to the worm.

  5. Exit the Registry Editor.

  6. Restart the computer in Normal mode. For instructions, read the section on returning to Normal mode in the document, "How to start the computer in Safe Mode."


Writeup By: Yana Liu