W32.Fanbot.A@mm

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Discovered: October 17, 2005
Updated: February 13, 2007 12:45:35 PM
Also Known As: W32/Fanbot-H [Sophos], WORM_FANBOT.A [Trend Micro]
Type: Worm
Systems Affected: Windows



W32.Fanbot.A@mm is a mass-mailing worm that lowers security settings on the compromised computer. It also spreads by exploiting the Microsoft Windows Plug and Play Buffer Overflow Vulnerability (described in Microsoft Security Bulletin MS05-039 ) and through peer-to-peer networks.

Antivirus Protection Dates

  • Initial Rapid Release version October 17, 2005
  • Latest Rapid Release version May 07, 2019 revision 006
  • Initial Daily Certified version October 17, 2005
  • Latest Daily Certified version May 07, 2019 revision 008
  • Initial Weekly Certified release date October 17, 2005

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


Technical Description


When W32.Fanbot.A@mm is executed, it performs the following actions:

  1. Displays a fake error message with the following text:

    Title: Error
    Body: The file could not be opened!



  2. Copies itself as the file %System%\remote.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 the following registry subkeys:

    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\RpcRemotes
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\RpcRemotes\Security

  4. Adds the values:

    "ImagePath" = "%System%\remote.exe"
    "DisplayName" = "Remote Procedure Call (RPC) Remote"
    "Type" = "110"
    "Start" = "2"
    "ErrorControl" = "1"
    "ObjectName" = "LocalSystem"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\RpcRemotes

    so that it is executed as a service every time Windows starts.

  5. Creates a service with the following characteristics:

    Display Name: Remote Procedure Call (RPC) Remote
    Image Path: %System%\remote.exe
    Type: Automatic

  6. Opens a back door on TCP port 5262 and connects to one of the following IRC servers:

    • jojogirl.3322.org domain
    • SmallPhantom.meibu.com domain

  7. Listens for commands, which allow the remote attacker to perform any of the following actions on the compromised computer:

    • Execute files
    • Download files
    • Retrieve system information
    • Remove or update the worm
    • Start or stop the mass-mailing routine
    • List threads
    • Send a log file of the worm
    • Restart or shutdown the computer
    • Replace Default.htm file in the document root folder of Microsoft IIS
    • Clear the event log
    • End threads
    • Read files
    • Access URLs
    • Open and close the CD-ROM tray
    • Create a remote shell to allow the attacker to execute any command
    • Perform DNS attacks
    • Upload files by ftp.exe
    • Redirect UDP packets

  8. Attempts to spread through peer-to-peer networks by copying itself to folders which contain any of the following strings in the folder name:

    • share
    • sharing
    • incoming
    • download
    • bak
    • bear
    • donkey
    • htdocs
    • http
    • ftp
    • www
    • icq
    • kazaa
    • lime
    • morpheus
    • mule
    • upload
    • soft
    • , which is ruanjian in Chinese characters, meaning "software"
    • , which is beifen in Chinese characters, meaning "backup"
    • , which is gongxiang in Chinese characters, meaning "shared"
    • , which is xiazai in Chinese characters, meaning "download"
    • , which is shangchuan in Chinese characters, meaning "upload"

      The worm copies itself using the following file names:

    • 1001 Sex and more.rtf.exe
    • 3D Studio Max 6 3dsmax.exe
    • ACDSee 10.exe
    • AcrobatReader_New.exe
    • activation_crack.exe
    • Adobe Photoshop 10 crack.exe
    • Adobe Photoshop 10 full.exe
    • Adobe Premiere 10.exe
    • Ahead Nero 8.exe
    • Altkins Diet.doc.exe
    • American Idol.doc.exe
    • angels.pif
    • Arnold Schwarzenegger.jpg.exe
    • Best Matrix Screensaver new.scr
    • Bifrost.scr
    • BlackIce_Firewall_Enterpriseactivation_Crack.exe
    • Britney sex xxx.jpg.exe
    • Britney Spears [REMOVED].jpg.exe
    • Britney Spears [REMOVED].jpg.exe
    • Britney Spears [REMOVED].jpg.exe
    • Britney Spears and Eminem porn.jpg.exe
    • Britney Spears full album.mp3.exe
    • Britney Spears porn.jpg.exe
    • Britney Spears Sexy archive.doc.exe
    • Britney Spears Song text archive.doc.exe
    • Britney Spears.jpg.exe
    • Britney Spears.mp3.exe
    • Butterfly.scr
    • Clone DVD 6.exe
    • Cloning.doc.exe
    • cool screensaver.scr
    • Cracks & Warez Archiv.exe
    • Dark Angels new.pif
    • dcom_patches.exe
    • Dictionary English 2004 - France.doc.exe
    • dictionary.doc.exe
    • DivX 8.0 final.exe
    • dolly_buster.jpg.pif
    • Doom 3 release 2.exe
    • doom2.doc.pif
    • e.book.doc.exe
    • E-Book Archive2.rtf.exe
    • e-book.archive.doc.exe
    • eminem - lick [REMOVED].mp3.pif
    • Eminem [REMOVED].jpg.exe
    • Eminem full album.mp3.exe
    • Eminem Poster.jpg.exe
    • Eminem sex xxx.jpg.exe
    • Eminem Sexy archive.doc.exe
    • Eminem Song text archive.doc.exe
    • Eminem Spears porn.jpg.exe
    • Eminem.mp3.exe
    • firefox-1.6a1.en-US.win32.installer.exe
    • Full album all.mp3.pif
    • Gimp 1.8 Full with Key.exe
    • Harry Potter 1-6 book.txt.exe
    • Harry Potter 5.mpg.exe
    • Harry Potter all e.book.doc.exe
    • Harry Potter e book.doc.exe
    • Harry Potter game.exe
    • Harry Potter.doc.exe
    • How to hack new.doc.exe
    • how to hack.doc.exe
    • icq2005-final.exe
    • Internet Explorer 9 setup.exe
    • 'K.jpg.pif
    • Kazaa Lite 4.0 new.exe
    • Kazaa new.exe
    • Keygen 4 all new.exe
    • Kula.jpg.pif
    • Kula.scr
    • Learn Programming 2004.doc.exe
    • Lightwave 9 Update.exe
    • Magix Video Deluxe 5 beta.exe
    • Matrix.mpg.exe
    • matrix.scr
    • max payne 2.crack.exe
    • Maxthon_New.exe
    • Microsoft Office 2003 Crack best.exe
    • Microsoft WinXP Crack full.exe
    • MS Service Pack 6.exe
    • MSN7-final.exe
    • netsky source code.scr
    • Norton Antivirus 2005 beta.exe
    • nuke2004.exe
    • Office_Crack.exe
    • Opera 11.exe
    • Partitionsmagic 10 beta.exe
    • Porno Screensaver britney.scr
    • porno.scr
    • programming basics.doc.exe
    • Rain.scr
    • RealPlayer_New.exe
    • RFC compilation.doc.exe
    • rfc compilation.doc.exe
    • Ringtones.doc.exe
    • Ringtones.mp3.exe
    • Saddam Hussein.jpg.exe
    • Screensaver2.scr
    • Serial.txt.exe
    • Serials 2005_New.exe
    • Serials edition.txt.exe
    • Smashing the stack full.rtf.exe
    • Star Office 9.exe
    • Strip-Girl-2.0b.exe
    • strippoker.exe
    • Super Dollfie.pif
    • Teen Porn 15.jpg.pif
    • The Sims 4 beta.exe
    • TouchNet Browser 1.29b.exe
    • Ulead Keygen 2004.exe
    • UltraEdit-32 12.01 + Cracker.exe
    • virii.scr
    • Visual Studio Net Crack all.exe
    • Win Longhorn re.exe
    • Win Longhorn.doc.exe
    • WinAmp 13 full.exe
    • Winamp5.exe
    • Windows 2000 Sourcecode.doc.exe
    • Windows 2003 crack.exe
    • Windows XP crack.exe
    • WinXP eBook newest.doc.exe
    • Winxp_Crack.exe
    • XXX hardcore pics.jpg.exe

  9. Attempts to send itself as an email using its own SMTP engine. The email has the following characteristics:

    From:
    One of the following: 

    • noreply@[RECIPIENT MAIL DOMAIN]
    • webmaster@[RECIPIENT MAIL DOMAIN]
    • register@[RECIPIENT MAIL DOMAIN]
    • info@[RECIPIENT MAIL DOMAIN]
    • admin@[RECIPIENT MAIL DOMAIN]
    • service@[RECIPIENT MAIL DOMAIN]
    • mail@[RECIPIENT MAIL DOMAIN]
    • administrator@[RECIPIENT MAIL DOMAIN]
    • support@[RECIPIENT MAIL DOMAIN]

      Subject:
      One of the following: 

    • Share Skype.
    • What is Skype?
    • Skype for Windows 1.4 - Have you got the new Skype?
    • Hello. We're Skype and we've got something we would like to share with you.
    • Your Account is Suspended.
    • *DETECTED* Online User Violation.
    • Your Account is Suspended For Security Reasons.
    • Warning Message: Your services near to be closed.
    • Important Notification!
    • Members Support.
    • Security measures.
    • Email Account Suspension.
    • Notice of account limitation.

      Note: The text in the Subject field may be capitalized.

      Message body: 
      One of the following: 

    • Dear [USER NAME], Skype is a little pie [REMOVED]
      Legal Information

      Note: The characters "--" are displayed as a dash on a Chinese langauge OS, but may be displayed differently in other language versions of the OS.
    • Dear user [USER NAME], You have success [REMOVED]
      +++ [DOMAIN NAME] Antivirus - www.[DOMAIN NAME]

    • Dear user [USER NAME], It has come to o [REMOVED]
      +++ [DOMAIN NAME] Antivirus - www.[DOMAIN NAME]

    • Dear [DOMAIN NAME] Member, We have temp [REMOVED]
      +++ [DOMAIN NAME] Antivirus - www.[DOMAIN NAME]

    • Dear [DOMAIN NAME] Member, Your e-mail  [REMOVED]
      +++ [DOMAIN NAME] Antivirus - www.[DOMAIN NAME]

      Attachment:
      [FILE NAME].zip

      The variable [FILE NAME] is one of the following:

    • Skype-stuffs
    • Skype-info
    • Skype-details
    • Skype
    • readme
    • Skype-document
    • Share Skype
    • Skype for Windows 1.4

      The ZIP file contains another file, the name of which is created as follows:

      [FILE NAME].[EXTENSION 1][MULTIPLE SPACES].[EXTENSION 2]

      where [FILE NAME] can be any of the strings listed above and [EXTENSION 1] is one of the following:

    • txt
    • htm
    • doc
    • tmp

      and [EXTENSION 2] is one of the following:

    • bat
    • cmd
    • exe
    • scr
    • pif

      The worm does not send email messages to addresses which contain any of the following strings:

    • root
    • info
    • samples
    • postmaster
    • webmaster
    • noone
    • nobody
    • nothing
    • anyone
    • someone
    • your
    • you
    • me
    • bugs
    • rating
    • site
    • contact
    • soft
    • no
    • somebody
    • privacy
    • service
    • help
    • not
    • submit
    • feste
    • ca
    • gold-certs
    • the.bat
    • page
    • support
    • spm
    • spam
    • www
    • secur
    • abuse
    • admin
    • icrosoft
    • support
    • ntivi
    • unix
    • bsd
    • linux
    • listserv
    • certific
    • google
    • accoun
    • master
    • avp
    • syma
    • icrosof
    • msn.
    • hotmail
    • panda
    • sopho
    • borlan
    • inpris
    • example
    • mydomai
    • nodomai
    • ruslis
    • messagelabs
    • support
    • .gov
    • gov.
    • .mil
    • foo.
    • antivi
    • fbi
    • f-pro
    • freeav
    • f-secur
    • kaspersky
    • mcafee
    • norman
    • norton
    • symantec
    • viruslis
    • jiangmin
    • rising
    • duba
    • berkeley
    • unix
    • math
    • bsd
    • mit.e
    • gnu
    • fsf.
    • ibm.com
    • google
    • kernel
    • linux
    • fido
    • usenet
    • iana
    • ietf
    • rfc-ed
    • sendmail
    • arin.
    • ripe.
    • isi.e
    • isc.o
    • secur
    • acketst
    • pgp
    • tanford.e
    • utgers.ed
    • mozilla
    • sourceforge
    • slashdot
    • sdbot

  10. Attempts to spread by exploiting the Microsoft Windows Plug and Play Buffer Overflow Vulnerability (as described in Microsoft Security Bulletin MS05-039).

  11. Adds the value

    "Ph4nt0m" = "Ph4nt0m"

    to the registry subkey

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Setup

    to act as an infection marker.

  12. Modifies the value:

    "Start" = "4"

    in the registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv

    to disable the wuauserv service.

  13. Modifies the value:

    "Start" = "4"

    in the registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess

    to disable the SharedAccess service.

  14. Blocks access to several security-related Web sites by adding the following entries to the hosts file:

    Play with the best [REMOVED] !!! thanks!!!
    0.0.0.0 jiangmin.com
    0.0.0.0 www.jiangmin.com
    0.0.0.0 Update2.JiangMin.com
    0.0.0.0 Update3.JiangMin.com
    0.0.0.0 rising.com.cn
    0.0.0.0 www.rising.com.cn
    0.0.0.0 online.rising.com.cn
    0.0.0.0 iduba.net
    0.0.0.0 www.iduba.net
    0.0.0.0 kingsoft.com
    0.0.0.0 db.kingsoft.com
    0.0.0.0 scan.kingsoft.com
    0.0.0.0 kaspersky.com.cn
    0.0.0.0 www.kaspersky.com.cn
    0.0.0.0 symantec.com.cn
    0.0.0.0 www.symantec.com.cn
    0.0.0.0 www.symantec.com
    0.0.0.0 securityresponse.symantec.com
    0.0.0.0 symantec.com
    0.0.0.0 www.sophos.com
    0.0.0.0 sophos.com
    0.0.0.0 www.mcafee.com
    0.0.0.0 mcafee.com
    0.0.0.0 liveupdate.symantecliveupdate.com
    0.0.0.0 www.viruslist.com
    0.0.0.0 viruslist.com
    0.0.0.0 viruslist.com
    0.0.0.0 f-secure.com
    0.0.0.0 www.f-secure.com
    0.0.0.0 kaspersky.com
    0.0.0.0 kaspersky-labs.com
    0.0.0.0 www.avp.com
    0.0.0.0 www.kaspersky.com
    0.0.0.0 avp.com
    0.0.0.0 www.networkassociates.com
    0.0.0.0 networkassociates.com
    0.0.0.0 www.ca.com
    0.0.0.0 ca.com
    0.0.0.0 mast.mcafee.com
    0.0.0.0 my-etrust.com
    0.0.0.0 www.my-etrust.com
    0.0.0.0 download.mcafee.com
    0.0.0.0 dispatch.mcafee.com
    0.0.0.0 secure.nai.com
    0.0.0.0 nai.com
    0.0.0.0 www.nai.com
    0.0.0.0 update.symantec.com
    0.0.0.0 updates.symantec.com
    0.0.0.0 us.mcafee.com
    0.0.0.0 liveupdate.symantec.com
    0.0.0.0 customer.symantec.com
    0.0.0.0 rads.mcafee.com
    0.0.0.0 trendmicro.com
    0.0.0.0 www.pandaguard.com
    0.0.0.0 pandasoftware.com
    0.0.0.0 www.pandasoftware.com
    0.0.0.0 www.trendmicro.com
    0.0.0.0 www.grisoft.com
    0.0.0.0 www.microsoft.com
    0.0.0.0 microsoft.com
    0.0.0.0 www.virustotal.com
    0.0.0.0 virustotal.com

  15. Attempts to end the following processes, some of which may be security-related:

    • A2HIJACKFREE.EXE
    • ADAM.EXE
    • AGTX0404.EXE
    • AGTX0411.EXE
    • AGTX0804.EXE
    • ALERTAST.EXE
    • ALESCAN.EXE
    • ALEUPDAT.EXE
    • ALUNOTIFY.EXE
    • ANTIVIRUS_UPDATE.EXE
    • APORTS.EXE
    • AUPDATE.EXE
    • BACKRAV.EXE
    • BLACKD.EXE
    • BLACKICE.EXE
    • BOTZOR.EXE
    • BRONSTAB.EXE
    • CCEMFLSV.EXE
    • CCENTER.EXE
    • CFGWIZ.EXE
    • CLEANUP.EXE
    • CMDAGENT.EXE
    • COOLBOT.EXE
    • CSM.EXE
    • CSSCAN.EXE
    • CVT.EXE
    • DEFWATCH.EXE
    • DWHWIZRD.EXE
    • EGHOST.EXE
    • EKSPLORASI.PIF
    • FINT2005.EXE
    • FRAMEWORKSERVICE.EXE
    • FRMINST.EXE
    • HELLMSN.SCR
    • HIJACKTHIS.EXE
    • HNETWIZ.EXE
    • HPMANAGER.EXE
    • IAMSTATS.EXE
    • ICESWORD.EXE
    • IDTEMPLATE.EXE
    • INBUILD.EXE
    • IPARMOR.EXE
    • ISSVC.EXE
    • JAVA.EXE
    • KATMAIN.EXE
    • KAV.EXE
    • KAV32.EXE
    • KAVDX.EXE
    • KAVLOG2.EXE
    • KAVPFW.EXE
    • KAVPFW.EXE
    • KAVSEND.EXE
    • KAVSTART.EXE
    • KAVSTART.EXE
    • KAVSVC.EXE
    • KILLBOX.EXE
    • KMAILMON.EXE
    • KNLPS.EXE
    • KNLSC13.EXE
    • KPFWSVC.EXE
    • KRECYCLE.EXE
    • KREGEX.EXE
    • KSHRMGR.EXE
    • KVCENTER.KXP
    • KVDETECH.EXE
    • KVDETECT.EXE
    • KVDISK.KXP
    • KVDOS.EXE
    • KVMONXP.KXP
    • KVOL.EXE
    • KVOLSELF.EXE
    • KVREPORT.KXP
    • KVSCAN.KXP
    • KVSRVXP.EXE
    • KVSTORY.KXP
    • KVSTUB.KXP
    • KVUPLOAD.EXE
    • KVWSC.EXE
    • KVXP.KXP
    • KWATCH.EXE
    • KWATCH9X.EXE
    • LANGSET.EXE
    • LDVPREG.EXE
    • LOGPARSER.EXE
    • LRSEND.EXE
    • LSETUP.EXE
    • LUALL.EXE
    • LUAWRAP.EXE
    • LUCOMSERVER.EXE
    • LUINIT.EXE
    • MAKEBOOT.EXE
    • MCAFFEAV.EXE
    • MCCONSOL.EXE
    • MCSCRIPT.EXE
    • MCSCRIPT_INUSE.EXE
    • MCUPDATE.EXE
    • MDAC.EXE
    • MOUSEBM.EXE
    • MOUSEMM.EXE
    • MOUSESYNC.EXE
    • MSAGENT.EXE
    • MSNMSGS.EXE
    • MSTASK.EXE
    • NAPRDMGR.EXE
    • NAVUSTUB.EXE
    • NDETECT.EXE
    • NVCHIP4.EXE
    • PATCH.EXE
    • PCCBROWS.EXE
    • PCCGUIDE.EXE
    • PCCLIENT.EXE
    • PCCLOG.EXE
    • PCCMAIN.EXE
    • PCCMDCOM.EXE
    • PCCSPYUI.EXE
    • PCCTLCOM.EXE
    • PCCTOOL.EXE
    • PCCVSCAN.EXE
    • PER.EXE
    • PFW.EXE
    • PHANTOM.EXE
    • PICX.EXE
    • PIREG.EXE
    • PM.EXE
    • PROCESSEXPLORER.EXE
    • RAV.EXE
    • RAVDOS.EXE
    • RAVHDBAK.EXE
    • RAVMON.EXE
    • RAVMOND.EXE
    • RAVPATCH.EXE
    • RAVSTORE.EXE
    • RAVSTUB.EXE
    • RAVTIMER.EXE
    • RAVXP.EXE
    • REALSCHED.EXE
    • REGCLEAN.EXE
    • REGGUIDE.EXE
    • REGSVR32.EXE
    • RESCUE.EXE
    • RFW.EXE
    • RFWMAIN.EXE
    • RFWSRV.EXE
    • RKDETECTOR.EXE
    • ROOTKITREVEALER.EXE
    • RSAGENT.EXE
    • RSCONFIG.EXE
    • RSSMS.EXE
    • RTVSCAN.EXE
    • RUNDLL32.EXE
    • SAVROAM.EXE
    • SCAN32.EXE
    • SCANBD.EXE
    • SCNCFG32.EXE
    • SCRIGZ.EXE
    • SERVCE.EXE
    • SETUPWIZ.EXE
    • SHCFG32.EXE
    • SHSTAT.EXE
    • SMARTDRV.EXE
    • SMARTUP.EXE
    • SMSS.EXE
    • SOUNDMAN.EXE
    • SYMANTECROOTINSTALLER.EXE
    • SYMCLNUP.EXE
    • SYSTEM.EXE
    • TASKGMR.EXE
    • TMNTSRV.EXE
    • TMOAGENT.EXE
    • TMPFW.EXE
    • TMPROXY.EXE
    • TRA.EXE
    • TRIALMSG.EXE
    • TROJANDETECTOR.EXE
    • TROJANWALL.EXE
    • TROJDIE.KXP
    • TSC.EXE
    • UNINSTALL.KXP
    • UPDATE.EXE
    • UPDATERUI.EXE
    • UPGRADE.EXE
    • VIRUSBOX.KXP
    • VPC32.EXE
    • VPDN_LU.EXE
    • VPTRAY.EXE
    • VSTSKMGR.EXE
    • WINHOST.EXE
    • WINLDR.EXE
    • WINTBP.EXE
    • WPA.EXE
    • WRITECAN.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.


Removal


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. Remove all the entries that the risk added to the hosts file.
  3. Update the virus definitions.
  4. Run a full system scan and delete all the files detected.
  5. Delete any values added to the registry.
  6. 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 remove all the entries that the risk added to the hosts file
  1. Navigate to the following location:

    • Windows 95/98/Me:
      %Windir%
    • Windows NT/2000/XP:
      %Windir%\System32\drivers\etc

      Notes:
    • The location of the hosts file may vary and some computers may not have this file. There may also be multiple copies of this file in different locations. If the file is not located in these folders, search your disk drives for the hosts file, and then complete the following steps for each instance found.
    • %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows (Windows 95/98/Me/XP) or C:\Winnt (Windows NT/2000).

  2. Double-click the hosts file.
  3. If necessary, deselect the "Always use this program to open this program" check box.
  4. Scroll through the list of programs and double-click Notepad.
  5. When the file opens, delete all the entries added by the risk. (See the Technical Details section for a complete list of entries.)
  6. 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 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.


4. 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.


5. 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 and delete the subkey:

    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\RpcRemotes

  5. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Setup

  6. In the right pane, delete the value:

    "Ph4nt0m" = "Ph4nt0m"

  7. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv

  8. In the right pane, reset the value to the original value if applicable:

    "Start" = "4"

  9. Exit the Registry Editor.


6. 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: Masaki Suenaga