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]
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 August 21, 2019 revision 022
- Initial Daily Certified version July 02, 2003
- Latest Daily Certified version August 12, 2019 revision 001
- Initial Weekly Certified release date July 02, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
When W32.Mapson.C.Worm runs, it does the following:
- Copies itself to the %System% folder as the following files:
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).
- Copies itself as C:\Mark.vxd.
- Adds the value:
to the registry key:
so that the worm runs each time you start Windows.
- Terminates the following processes:
- 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\ICQ\shared files
C:\Program Files\Morpheus\my shared folder
C:\Program Files\Grokster\My Grokster
AOL Instant Messenger (AIM).exe
Avril Lavigne Fucked Bitch.exe
Biromsoft WebCam .exe
Copernic Agent .exe
Delphi 6 Serial.exe
Diet Kaza .exe
Download Accelerator Plus.exe
Global DiVX Player .exe
ICQ Lite .exe
ICQ Pro 2003a beta .exe
Kaspersky Antivirus Crack.exe
Kazaa 2.05 beta .exe
Kazaa Download Accelerator .exe
Kazaa Media Desktop .exe
Microsoft Internet Explorer .exe
Microsoft Office XP Serial.exe
Microsoft Windows 2003 Serial.txt .exe
Microsoft Windows Media Player .exe
Nero Burning ROM .exe
Network Cable e ADSL Speed .exe
NOD32 Antivirus Crack.exe
Norton Antivirus Crack.exe
Office 2003 Serial.exe
Pop-Up Stopper .exe
Sofía Vergara Sexy Bikini.exe
Spybot - Search & Destroy .exe
StarCraft No CD Crack.exe
Visual Studio Net Serial.exe
WS_FTP LE (32-bit) .exe
XoloX Ultra .exe
ZoneAlarm Full Version.exe
- 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:
Subject: Alerta por Virus W32/Mapson
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.
Subject: Re:Reenviamelo de nuevo
Message: Si te gusto reenviamelo.
Subject: Re:Quitan cuentas de hotmail.
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
Subject: Problema de seguridad en Internet Explorer
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
Subject: Re: LTelo y reenvfalo a quienes mas amas.
Si el documento expone lo que sientes hacia otra persona, reenvíalo a tus amigos y un sueño se hará realidad.
Subject: Si no te late....
Message:Si no te late, devuTlvemelo
Subject: Lista de Hoaxes
Te envío una lista de hoaxes, virus falsos, para que estés prevenido y no hagas caso a las mentiras, chau cuídate
Subject: Para mis amigos
Message:Los mejores chistes que tengo, disfrutenlos
- 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.
- 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
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.
The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.
- Disable System Restore (Windows Me/XP).
- Update the virus definitions.
- Restart the computer in Safe mode or VGA mode.
- Run a full system scan and delete all the files detected as W32.Mapson.C.Worm. Delete C:\lorraine.c.hta, if exists.
- Delete the value that was added to the registry.
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:
- "How to disable or enable Windows Me System Restore"
- "How to turn off or turn on Windows XP System Restore"
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
- Start your Symantec antivirus program and make sure that it is configured to scan all the files.
- For Norton AntiVirus consumer products: Read the document, "How to configure Norton AntiVirus to scan all files."
- For Symantec AntiVirus Enterprise products: Read the document, "How to verify that a Symantec Corporate antivirus product is set to scan all files."
- Run a full system scan.
- If any files are detected as infected with W32.Mapson.C.Worm, click Delete.
- 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.
- Click Start, and then click Run. (The Run dialog box appears.)
- Type regedit
Then click OK. (The Registry Editor opens.)
- Navigate to the key:
- In the right pane, delete the value:
- Exit the Registry Editor.
Writeup By: Yana Liu