SymbOS.Cardtrp.AB

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Discovered: March 09, 2006
Updated: February 13, 2007 12:51:49 PM
Type: Trojan Horse
Systems Affected: EPOC, Windows


SymbOS.Cardtrp.AB is a Trojan horse that runs on the Symbian OS, which is used as the operating system for Nokia Series 60 cellular telephones. It disables some applications installed on the device and drops threats onto the device's memory card, which can compromise computers running Windows.

Antivirus Protection Dates

  • Initial Rapid Release version March 09, 2006
  • Latest Rapid Release version December 01, 2017 revision 032
  • Initial Daily Certified version March 09, 2006
  • Latest Daily Certified version December 02, 2017 revision 001
  • Initial Weekly Certified release date March 15, 2006

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

Writeup By: Kaoru Hayashi

Discovered: March 09, 2006
Updated: February 13, 2007 12:51:49 PM
Type: Trojan Horse
Systems Affected: EPOC, Windows


The Trojan reportedly arrives as the following file named Opera PATCH FULL ++.sis. When the user opens this file, the phone displays a dialog box to warn the user that the application may be coming from an untrusted source and may cause potential problems. If the user clicks yes, the device displays the following message prompting the user to install the threat:

Install
Opera PATCH FULL ++

When SymbOS.Cardtrp.AB is executed, it performs the following actions:

  1. Displays the following message:

    Opera's Patch Ver. 7.5 ----------------------------------------------- Simply Change the start page and other functions! Enjoy! ----------------------------------- Opera CRACKED BY SAN_SHAKER

  2. Drops the following files:

    • [DRIVE LETTER]\System\Apps\Opera\ZH-CN\troubleshoot.html
    • [DRIVE LETTER]\System\Apps\Opera\ZH-CN\start.html
    • [DRIVE LETTER]\System\Apps\Opera\ZH-CN\keypad.html
    • [DRIVE LETTER]\System\Apps\Opera\ZH-CN\index.html
    • [DRIVE LETTER]\System\Apps\Opera\ZH-CN\home.html
    • [DRIVE LETTER]\System\Apps\Opera\ZH-CN\connect.html
    • [DRIVE LETTER]\System\Apps\Opera\TH\troubleshoot.html
    • [DRIVE LETTER]\System\Apps\Opera\TH\start.html
    • [DRIVE LETTER]\System\Apps\Opera\TH\keypad.html
    • [DRIVE LETTER]\System\Apps\Opera\TH\index.html
    • [DRIVE LETTER]\System\Apps\Opera\TH\home.html
    • [DRIVE LETTER]\System\Apps\Opera\TH\connect.html
    • [DRIVE LETTER]\System\Apps\Opera\start_on.gif
    • [DRIVE LETTER]\System\Apps\Opera\start.gif
    • [DRIVE LETTER]\System\Apps\Opera\portal_on.gif
    • [DRIVE LETTER]\System\Apps\Opera\portal.gif
    • [DRIVE LETTER]\System\Apps\Opera\link.gif
    • [DRIVE LETTER]\System\Apps\Opera\keypad_on.gif
    • [DRIVE LETTER]\System\Apps\Opera\keypad.gif
    • [DRIVE LETTER]\System\Apps\Opera\ID\troubleshoot.html
    • [DRIVE LETTER]\System\Apps\Opera\ID\start.html
    • [DRIVE LETTER]\System\Apps\Opera\ID\keypad.html
    • [DRIVE LETTER]\System\Apps\Opera\ID\index.html
    • [DRIVE LETTER]\System\Apps\Opera\ID\home.html
    • [DRIVE LETTER]\System\Apps\Opera\ID\connect.html
    • [DRIVE LETTER]\System\Apps\Opera\home.png
    • [DRIVE LETTER]\System\Apps\Opera\help_on.gif
    • [DRIVE LETTER]\System\Apps\Opera\help.gif
    • [DRIVE LETTER]\System\Apps\Opera\file.gif
    • [DRIVE LETTER]\System\Apps\Opera\EN-GB\troubleshoot.html
    • [DRIVE LETTER]\System\Apps\Opera\EN-GB\start.html
    • [DRIVE LETTER]\System\Apps\Opera\EN-GB\keypad.html
    • [DRIVE LETTER]\System\Apps\Opera\EN-GB\index.html
    • [DRIVE LETTER]\System\Apps\Opera\EN-GB\home.html
    • [DRIVE LETTER]\System\Apps\Opera\EN-GB\connect.html
    • [DRIVE LETTER]\System\Apps\Opera\drive.gif
    • [DRIVE LETTER]\System\Apps\Opera\connect_on.gif
    • [DRIVE LETTER]\System\Apps\Opera\connect.gif
    • [DRIVE LETTER]\System\Apps\Opera\community_on.gif
    • [DRIVE LETTER]\System\Apps\Opera\community.gif
    • [DRIVE LETTER]\System\Apps\Opera\blank.gif
    • C:\System\Data\Backgroundimage.mbm
    • C:\System\Apps\SystemExplorer\SystemExplorer.app
    • C:\System\Apps\SystemExplorer\SystemExplorer.aif
    • C:\System\Apps\FExplorer\FExplorer.app
    • C:\System\Apps\FExplorer\FExplorer.aif
    • C:\System\Apps\AppMngr\Appmngr.app
    • C:\System\Apps\AppMngr\Appmngr.aif
    • C:\System\Apps\AppInst\Appinst.app
    • C:\System\Apps\AppInst\Appinst.aif
    • C:\System\Apps\Anti-virus\Anti-virus.app
    • C:\System\Apps\Anti-virus\Anti-virus.aif

      Note:
    • [DRIVE LETTER] is a variable that refers to the drive letter used to represent the device itself or the memory card. The actual value will depend on the choice the user makes during the installation process.
    • Many files dropped by the Trojan are corrupted, which disables several legitimate programs and may prevent the device from restarting.
    • The dropped .html files are identical, and all display the following text when opened:

      YOU HAVE BEEN INFECTED BY SAN SHAKER'S VIRUS

  3. Drops the following files to the compromised device's memory card:

    • E:\virus.ico
    • E:\GreatLove.txt.exe (A copy of W32.Blaster.Worm.)
    • E:\autorun.inf

      Note: The autorun file created on the memory card tries to run the worm file GreatLove.txt.exe if the card is inserted into a Windows computer.

  4. The following file is also created by the device Installer, not the Trojan itself:

    \system\install\Opera PATCH FULL ++.sis


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: Kaoru Hayashi

Discovered: March 09, 2006
Updated: February 13, 2007 12:51:49 PM
Type: Trojan Horse
Systems Affected: EPOC, Windows


  1. Install a file manager program on the device.

  2. Enable the option to view the files in the system folder.

  3. Delete the following malicious files:

    • [DRIVE LETTER]\System\Apps\Opera\ZH-CN\troubleshoot.html
    • [DRIVE LETTER]\System\Apps\Opera\ZH-CN\start.html
    • [DRIVE LETTER]\System\Apps\Opera\ZH-CN\keypad.html
    • [DRIVE LETTER]\System\Apps\Opera\ZH-CN\index.html
    • [DRIVE LETTER]\System\Apps\Opera\ZH-CN\home.html
    • [DRIVE LETTER]\System\Apps\Opera\ZH-CN\connect.html
    • [DRIVE LETTER]\System\Apps\Opera\TH\troubleshoot.html
    • [DRIVE LETTER]\System\Apps\Opera\TH\start.html
    • [DRIVE LETTER]\System\Apps\Opera\TH\keypad.html
    • [DRIVE LETTER]\System\Apps\Opera\TH\index.html
    • [DRIVE LETTER]\System\Apps\Opera\TH\home.html
    • [DRIVE LETTER]\System\Apps\Opera\TH\connect.html
    • [DRIVE LETTER]\System\Apps\Opera\start_on.gif
    • [DRIVE LETTER]\System\Apps\Opera\start.gif
    • [DRIVE LETTER]\System\Apps\Opera\portal_on.gif
    • [DRIVE LETTER]\System\Apps\Opera\portal.gif
    • [DRIVE LETTER]\System\Apps\Opera\link.gif
    • [DRIVE LETTER]\System\Apps\Opera\keypad_on.gif
    • [DRIVE LETTER]\System\Apps\Opera\keypad.gif
    • [DRIVE LETTER]\System\Apps\Opera\ID\troubleshoot.html
    • [DRIVE LETTER]\System\Apps\Opera\ID\start.html
    • [DRIVE LETTER]\System\Apps\Opera\ID\keypad.html
    • [DRIVE LETTER]\System\Apps\Opera\ID\index.html
    • [DRIVE LETTER]\System\Apps\Opera\ID\home.html
    • [DRIVE LETTER]\System\Apps\Opera\ID\connect.html
    • [DRIVE LETTER]\System\Apps\Opera\home.png
    • [DRIVE LETTER]\System\Apps\Opera\help_on.gif
    • [DRIVE LETTER]\System\Apps\Opera\help.gif
    • [DRIVE LETTER]\System\Apps\Opera\file.gif
    • [DRIVE LETTER]\System\Apps\Opera\EN-GB\troubleshoot.html
    • [DRIVE LETTER]\System\Apps\Opera\EN-GB\start.html
    • [DRIVE LETTER]\System\Apps\Opera\EN-GB\keypad.html
    • [DRIVE LETTER]\System\Apps\Opera\EN-GB\index.html
    • [DRIVE LETTER]\System\Apps\Opera\EN-GB\home.html
    • [DRIVE LETTER]\System\Apps\Opera\EN-GB\connect.html
    • [DRIVE LETTER]\System\Apps\Opera\drive.gif
    • [DRIVE LETTER]\System\Apps\Opera\connect_on.gif
    • [DRIVE LETTER]\System\Apps\Opera\connect.gif
    • [DRIVE LETTER]\System\Apps\Opera\community_on.gif
    • [DRIVE LETTER]\System\Apps\Opera\community.gif
    • [DRIVE LETTER]\System\Apps\Opera\blank.gif
    • C:\System\Data\Backgroundimage.mbm
    • C:\System\Apps\SystemExplorer\SystemExplorer.app
    • C:\System\Apps\SystemExplorer\SystemExplorer.aif
    • C:\System\Apps\FExplorer\FExplorer.app
    • C:\System\Apps\FExplorer\FExplorer.aif
    • C:\System\Apps\AppMngr\Appmngr.app
    • C:\System\Apps\AppMngr\Appmngr.aif
    • C:\System\Apps\AppInst\Appinst.app
    • C:\System\Apps\AppInst\Appinst.aif
    • C:\System\Apps\Anti-virus\Anti-virus.app
    • C:\System\Apps\Anti-virus\Anti-virus.aif
    • E:\virus.ico
    • E:\GreatLove.txt.exe (A copy of W32.Blaster.Worm - MCID 1761)
    • E:\autorun.inf
    • \system\install\Opera PATCH FULL ++.sis

  4. Exit the file manager.


Writeup By: Kaoru Hayashi