W32.Gaobot.ALO

Printer Friendly Page

Discovered: May 18, 2004
Updated: February 13, 2007 12:23:17 PM
Type: Worm
Systems Affected: Windows


W32.Gaobot.ALO is a worm that spreads through open network shares and several Windows vulnerabilities. The vulnerabilities are:


The worm also spreads through backdoors installed by Beagle and Mydoom family of worms.

W32.Gaobot.ALO can act as a backdoor server program and attack other systems. It also attempts to kill the processes of many antivirus and security programs.


Note : Virus definitions dated prior to May 19, 2004 detect this threat as W32.HLLW.Gaobot.gen.


Antivirus Protection Dates

  • Initial Rapid Release version May 19, 2004
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version May 19, 2004
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date May 19, 2004

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

Writeup By: Scott Gettis

Discovered: May 18, 2004
Updated: February 13, 2007 12:23:17 PM
Type: Worm
Systems Affected: Windows


When W32.Gaobot.ALO runs it performs the following actions:

  1. Copies itself as sysconf.exe to the %System% folder. This file name may vary.


    Note: %System% is a variable. The W32.Gaobot.ALO 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:

    "Video Process" = "%System%\sysconf.exe"

    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 on startup.

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

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

  4. Attempts to terminate the processes of a large number of antivirus and security applications. See the Processes section for a complete list.

  5. Attempts to delete files and registry key entries associated with other worms and end the following processes:
    • bbeagle.exe
    • d3dupdate.exe
    • winsys.exe
    • ssate.exe
    • Ssate.exe
    • i11r54n4.exe
    • rate.exe
    • irun4.exe

  6. Opens a randomly selected TCP port and sends a copy of itself to any process connecting to that port.

  7. Connects to a remote IRC server and awaits commands from the remote attacker. This allows the attacker to perform the following actions on the infected system:
    • Run commands
    • Retrieve files through FTP and HTTP
    • Retrieve data from the registry
    • Restart the computer
    • List the processes
    • Kill a particular process
    • Terminate Windows services
    • Perform HTTP, ICMP, SYN, and UDP floods
    • Retrieve the email addresses stored on the computer
    • Retrieve a list of email addresses through HTTP
    • Retrieve a given URL
    • Sniff HTTP, FTP, and IRC traffic
    • Steal the Windows product ID and the CD keys of various video games

  8. Attempts to spread to other systems by:
  9. Attempts to copy itself to other computers through the following remote administrative SMB shares:
    • admin$
    • print$
    • ipc$
    • e$
    • d$
    • c$
    • c

      using the following usernames and passwords:

      Usernames:
    • a
    • aaa
    • abc
    • admin
    • Administrador
    • administrador
    • 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
    • kt
    • login
    • mark
    • mary
    • mgmt
    • mike
    • mypc
    • mysql
    • OEM
    • Ospite
    • Owner
    • owner
    • OWNER
    • patrick
    • pc
    • peter
    • qwer
    • root
    • server
    • sql
    • stacey
    • stacy
    • Standard
    • stefan
    • steve
    • steven
    • student
    • teacher
    • temp
    • Test
    • test
    • tim
    • tom
    • User
    • user
    • Verwalter
    • win
    • wwwadmin
    • x
    • xp
    • xyz


      Passwords:
    • !@#$
    • !@#$%
    • !@#$%^
    • !@#$%^&
    • !@#$%^&*
    • 0
    • 000000
    • 00000000
    • 007
    • 110
    • 111
    • 111111
    • 11111111
    • 12
    • 121212
    • 123
    • 123123
    • 1234
    • 12345
    • 123456
    • 1234567
    • 12345678
    • 123456789
    • 1234qwer
    • 123abc
    • 123asd
    • 123qwe
    • 1776
    • 1778
    • 2002
    • 2003
    • 2004
    • 23
    • 2525
    • 2600
    • 42
    • 54321
    • 654321
    • 654321
    • 666
    • 69
    • 88888888
    • a
    • aaa
    • abc
    • abc123
    • abcd
    • ACCESS
    • admin
    • Admin
    • admin123
    • Administrador
    • administrador
    • Administrateur
    • ADMINISTRATOR
    • administrator
    • administrator
    • admins
    • alpha
    • ami
    • amie
    • asdf
    • asdfgh
    • asdfghjkl
    • askaban
    • ASP
    • athlon
    • azerty
    • azkaban
    • baby
    • backdoor
    • BACKUP
    • beer
    • biere
    • biFre
    • bong
    • BOX
    • Box
    • box
    • box
    • buckbeak
    • carte
    • cauldron
    • cederom
    • changeme
    • changeme
    • CNN
    • computer
    • computer
    • Coordinatore
    • copin
    • copine
    • crash
    • cTdTrom
    • database
    • database
    • Default
    • dementor
    • devil
    • dope
    • drugs
    • dude
    • dumbledore
    • ecran
    • enable
    • fanny
    • feds
    • fish
    • foobar
    • fool
    • freak
    • fucked
    • gay
    • god
    • godblessyou
    • gryffindor
    • hagrid
    • harry
    • hax
    • hermine
    • hermione
    • hogwarts
    • home
    • homework
    • idiot
    • ihavenopass
    • imprimeur
    • Internet
    • Internet
    • iraq
    • jackdaniels
    • kids
    • leet
    • linux
    • LOCAL
    • login
    • Login
    • lol
    • love
    • madre
    • merde
    • metal
    • mince
    • moonshine
    • mouse
    • mybaby
    • mybox
    • mypass
    • mypc
    • newfie
    • newfy
    • noob
    • oil
    • opteron
    • oracle
    • ordinateur
    • Ospite
    • own
    • owned
    • owner
    • pass
    • pass
    • passwd
    • PASSWD
    • passwd
    • password
    • Password
    • password123
    • pat
    • patrick
    • pc
    • penis
    • PHP
    • poiut
    • poiuytrewq
    • porn
    • potter
    • private
    • pussy
    • pw
    • pwd
    • pwned
    • quidditch
    • qwer
    • qwerty
    • qwertyuiop
    • r00t
    • red123
    • reseau
    • ROOT
    • root
    • root
    • rooted
    • school
    • secret
    • secret
    • secrets
    • SERVER
    • server
    • sex
    • share
    • souris
    • student
    • super
    • superman
    • supersecret
    • switch
    • sybase
    • SYSTEM
    • Tcran
    • teacher
    • TEMP
    • temp
    • Tennessee
    • tennessee
    • TEST
    • test
    • test
    • test123
    • texas
    • Texas
    • UNIX
    • user
    • vagina
    • Verwalter
    • Washington
    • washington
    • werty
    • West
    • west
    • wh0re
    • whiskey
    • whisky
    • whore
    • win
    • windows2k
    • windows98
    • windowsME
    • WindowsXP
    • windoze
    • wmd
    • work
    • wwwadmin
    • x
    • xp
    • xxx
    • xxyyzz
    • yxcv
    • z
    • zxcv
    • zxcvbnm

  10. Copies itself to and executes on any remote shares that it successfully authenticates.

  11. Schedules a Network job to run the worm on the remote system.

Processes
W32.Gaobot.ALO attempts to end the following processes:
  • _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
  • ATUPDATER.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
  • 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: Scott Gettis

Discovered: May 18, 2004
Updated: February 13, 2007 12:23:17 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. Delete the lines that were added to the Windows Hosts file.
  3. Update the virus definitions.
  4. Restart the computer in Safe mode or VGA mode.
  5. Run a full system scan and delete all the files detected as W32.Gaobot.ALO.
  6. Reverse the changes made to the registry.
For 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, 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 delete the added lines from 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 Hosts file that you find, right-click the file, and then click "Open With."
      6. Deselect the "Always use this program to open this program" check box.
      7. Scroll through the list of programs and double-click Notepad.
      8. When the file opens, delete all the entries in the Hosts file, except for the following line:

        127.0.0.1     localhost

      9. 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 Hosts file that you find, right-click the file, and then click "Open With."
      11. Deselect the "Always use this program to open this program" check box.
      12. Scroll through the list of programs and double-click Notepad.
      13. When the file opens, delete all the entries in the Hosts file except for the following line:

        127.0.0.1     localhost

      14. Close Notepad and save your changes when prompted.

3. 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.

    4. 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.
5. To scan for and delete the infected files
6. Reversing 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 the keys:
      • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
      • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServices

    4. Delete the value:

      "Video Process" = "%System%\sysconf.exe"

    5. Exit the Registry Editor.


Writeup By: Scott Gettis