W32.Mapson.C.Worm

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Discovered: July 01, 2003
Updated: February 13, 2007 12:03:17 PM
Also Known As: I-Worm.Mapson.c [KAV], Win32.Mapson.C [CA], W32/Mapson.gen@MM [McAfee]
Type: Worm
Systems Affected: Windows


W32.Mapson.C.Worm is a mass-mailing worm that sends itself to all the contacts in the MSN messenger contact list. The Subject line, Message body, and attachment vary. The attachment will have a .com, .exe, .scr, or .pif extension. Also, the email may spoof the From field.

The W32.Mapson.C.Worm worm:

  • Attempts to spread itself through the KaZaA, KaZaA Lite, eDonkey2000, Gnucleus, Limewire, Morpheus, and Grokster file-sharing networks, as well as through ICQ.
  • Terminates some popular antivirus, firewall, and system-monitoring programs.
  • Is written in the Borland Delphi programming language and is compressed with UPX.


Antivirus Protection Dates

  • Initial Rapid Release version July 02, 2003
  • Latest Rapid Release version November 13, 2018 revision 025
  • Initial Daily Certified version July 02, 2003
  • Latest Daily Certified version November 14, 2018 revision 002
  • Initial Weekly Certified release date July 02, 2003

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

Writeup By: Yana Liu

Discovered: July 01, 2003
Updated: February 13, 2007 12:03:17 PM
Also Known As: I-Worm.Mapson.c [KAV], Win32.Mapson.C [CA], W32/Mapson.gen@MM [McAfee]
Type: Worm
Systems Affected: Windows


When W32.Mapson.C.Worm runs, it does the following:

  1. Copies itself to the %System% folder as the following files:

    analysis_mzn6.pif
    animation-simpsons.scr
    Cards_love.pif
    counsels.pif
    documents.scr
    friends.pif
    hoax-list.com
    IEXPLORER_STACK.pif
    Ivalue-much.pif
    jokess.scr
    Lorena.exe
    love-forever.pif
    my_best_friend.pif
    NSPCLEAN.exe
    OsamaBinLadenJokes.scr
    Photookosmike.scr
    reality_dreams.pif
    real_love.scr
    sexual_steps.pif
    steps.pif

    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. Copies itself as C:\Mark.vxd.

  3. Adds the value:

    "LOAD32"="%System%\Lorena.exe"

    to the registry key:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run

    so that the worm runs each time you start Windows.

  4. Terminates the following processes:

    _AVP32.exe
    _AVPCC.exe
    _AVPM.exe
    ADVXDWIN.exe
    AGENTW.EXE
    ALERTSVC.exe
    ALOGSERV.exe
    AMON9X.exe
    ANTI-TROJAN.exe
    ANTS.exe
    APVXDWIN.exe
    ATCON.exe
    ATUPDATER.exe
    ATWATCH.exe
    AUTODOWN.exe
    AVCONSOL.exe
    AVGCC32.exe
    AVGCTRL.exe
    AVGSERV.exe
    AVGSERV9.exe
    AVGW.exe
    AVKPOP.exe
    AVKSERV.exe
    AVKSERVICE.exe
    AVKWCTL9
    AVP32.exe
    AVPCC.exe
    AVPM.exe
    AVPM.EXE
    AVSCHED32.exe
    AVSYNMGR.exe
    PAV.EXE
    AVWINNT.EXE
    AVXMONITOR9X.exe
    AVXMONITORNT.exe
    AVXQUAR.exe
    AVXQUAR.EXE
    AVXW.exe
    BLACKD.exe
    BLACKICE.exe
    CCAPP.EXE
    CCEVTMGR.EXE
    CCPXYSVC.EXE
    ETRUSTCIPE.EXE
    EVPN.EXE
    EXPERT.exe
    F-AGNT95.exe
    FAMEH32.exe
    F-PROT.exe
    F-PROT95.exe
    FP-WIN.exe
    FRW ERV.exe
    IOMON98.exe
    NAV AUTO-PROTECT.exe
    NAVAP.EXE
    NAVAPSVC.EXE
    Navapw32.exe
    NAVENG
    NAVEX15.EXE
    NAVLU32.EXE
    NAVW32.EXE
    NAVWNT.EXE
    NDD32.EXE
    NPSSVC.EXE
    NSCHED32.EXE
    PCCIOMON.EXE
    PCCNTMON.EXE
    PCCWIN97.EXE
    PCCWIN98.EXE
    PCSCAN.EXE
    PERSFW.EXE
    PERSWF.EXE
    POP3TRAP.EXE
    RAV7.EXE
    VPC32.EXE
    VPTRAY.EXE
    VSCHED.EXE
    AVCONSOL.EXE
    VSECOMR.EXE
    VSHWIN32.EXE
    VSMAIN.EXE
    VSMON.EXE
    VSSTAT.EXE
    ZONEALARM.EXE
    ICLOAD95.EXE
    ICMON.EXE
    ICSUPP95.EXE
    ICLOADNT.EXE
    ICSUPPNT.EXE
    IFACE.EXE
    Regedit.EXE
    Regedit.com
    msconfig.EXE
    sfc.EXE
    sysedit.EXE
    regedt32.EXE
    NSPCLEAN.exe
    taskmgr.exe

  5. Attempts to copy itself to the following folders:

    C:\Program Files\KaZaA\My shared Folder
    C:\Program Files\KaZaA Lite\my shared folders
    C:\Program Files\\edonkey2000\incoming
    C:\Program Files\Gnucleus\downloads
    C:\Program Files\ICQ\shared files
    C:\Program Files\Limewire\shared
    C:\Program Files\Morpheus\my shared folder
    C:\Program Files\Grokster\My Grokster

    as:

    Ad-aware .exe
    AOL Instant Messenger (AIM).exe
    Avril Lavigne Fucked Bitch.exe
    Biromsoft WebCam .exe
    Copernic Agent .exe
    Delphi 6 Serial.exe
    Diet Kaza .exe
    DirectDVD .exe
    Download Accelerator Plus.exe
    Global DiVX Player .exe
    Grokster.exe
    ICQ Lite .exe
    ICQ Pro 2003a beta .exe
    iMesh .exe
    Kaspersky Antivirus Crack.exe
    Kazaa 2.05 beta .exe
    Kazaa Download Accelerator .exe
    Kazaa Media Desktop .exe
    Mcafee Serial.exe
    Microsoft Internet Explorer .exe
    Microsoft Office XP Serial.exe
    Microsoft Windows 2003 Serial.txt .exe
    Microsoft Windows Media Player .exe
    Morpheus .exe
    Msn Hack.exe
    Nero Burning ROM .exe
    Network Cable e ADSL Speed .exe
    NOD32 Antivirus Crack.exe
    Norton Antivirus Crack.exe
    Office 2003 Serial.exe
    PerAntivirus Crack.exe
    Pop-Up Stopper .exe
    QuickTime .exe
    Registry Mechanic.exe
    Shakira Sucks.jpg.exe
    SnagIt .exe
    Sofía Vergara Sexy Bikini.exe
    Spybot - Search & Destroy .exe
    StarCraft No CD Crack.exe
    Trillian .exe
    Visual Studio Net Serial.exe
    Winamp.exe
    WinMX .exe
    WinZip.exe
    WS_FTP LE (32-bit) .exe
    XoloX Ultra .exe
    ZoneAlarm Full Version.exe

  6. Attempts to send itself to all the email addresses it finds in the MSN Messenger contact list. The Subject line, Message body, and attachment vary. Also, the email may have spoofed the From field.

    Some mail examples:

    From: antivirus@nod32.com|
    Subject: Alerta por Virus W32/Mapson
    Message:
    En los últimos días se ha ido detectando un nuevo virus llamado Mapson, ya se han detectado varios infectados de este gusano, si usted se encuentra infectado podrá remover este gusano con esta herramienta gratuita que le hemos enviado, una vacuna que hemos diseñado especialmente para usuarios de hotmail, si usted esta de acuerdo haga clic en el adjunto para empezar el scaneo y eliminar este despreciable gusano de su maquina. Gracias.
    Attachment: NSPCLEAN.exe

    Subject: Re:Reenviamelo de nuevo
    Message: Si te gusto reenviamelo.
    Attachment: bromas.scr

    Subject: Re:Quitan cuentas de hotmail.
    Message:
    Al parecer hotmail ya esta muy saturado de usuarios y amenazan con quitar cuentas, pero se puede evitar siguiendo unos pasos, léelos y no tendrás problemas, chau
    Attachment: pasos.pif

    Subject: Problema de seguridad en Internet Explorer
    Message:
    Un problema de seguridad a sido detectado en Internet Explorer se recomienda aplicar los correspondientes parches ya que esta vulnerabilidad puede permitir la ejecución arbitraria de código en la maquina afectada, para saber mas acerca de esta vulnerabilidad favor de leer el documento y así prevenir el ataque de un virus informativo
    Attachment: IEXPLORERSTACK.pif

    Subject: Re: LTelo y reenvfalo a quienes mas amas.
    Message:
    Si el documento expone lo que sientes hacia otra persona, reenvíalo a tus amigos y un sueño se hará realidad.
    Attachment: amor_real.pif

    Subject: Si no te late....
    Message:Si no te late, devuTlvemelo
    Attachment: fotokosmiko.scr

    Subject: Lista de Hoaxes
    Message:
    Te envío una lista de hoaxes, virus falsos, para que estés prevenido y no hagas caso a las mentiras, chau cuídate
    Attachment: hoax-list.com

    Subject: Para mis amigos
    Message:Los mejores chistes que tengo, disfrutenlos
    Attachment: OsamaBinLadenJokes.scr

  7. If the current system date is the 4th of any month, the worm will create C:\lorraine.c.hta and download a .html file from the Web site, http:/ /www.gratisweb.com.

  8. If the current system month is October, the worm will display messages that have the following characteristics:

    Title: W32/Lorraine.c [GEDZAC LABS 2003]
    Message: Bi0C0ded by Falckon/GEDZA

    Title: W32/Lorraine.c [GEDZAC LABS 2003]
    Message: Lorraine ReC0deD and Reloaded :P


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: July 01, 2003
Updated: February 13, 2007 12:03:17 PM
Also Known As: I-Worm.Mapson.c [KAV], Win32.Mapson.C [CA], W32/Mapson.gen@MM [McAfee]
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. Restart the computer in Safe mode or VGA mode.
  4. Run a full system scan and delete all the files detected as W32.Mapson.C.Worm. Delete C:\lorraine.c.hta, if exists.
  5. Delete the value that was added to the registry.
For specific details on each of these steps, read the following instructions.

1. Disabling 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:
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. Updating 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.

3. Restarting 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 on restarting in Safe mode, refer to the document, "How to start the computer in Safe Mode."
  • For Windows NT 4 users, restart the computer in VGA mode.


4. Scanning for and deleting 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 infected with W32.Mapson.C.Worm, click Delete.
  4. Delete the file, C:\lorraine.c.hta, if it exists.

4. Deleting the value from the registry

CAUTION : 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 key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  4. In the right pane, delete the value:

    "LOAD32"="%System%\Lorena.exe"

  5. Exit the Registry Editor.




Writeup By: Yana Liu