Threat Descriptons



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Cardtrap.AH is a Symbian SIS file trojan that disables several of Symbian's built-in applications, tries to damage some third party applications, and installs Windows malware to the memory card.If you have installed Cardtrap.AH, the most important thing is to not reboot the phone and to follow the disinfection instructions in the section below.


A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note: You need administrative rights to change the settings.

Technical Details

Installation to the phone

Cardtrap.AH tries to disable key system applications and third party products by installing several damaged files to the phone memory.

Cardtrap.AH installs files from the following Symbian malware:

  • SymbOS/Doomboot.A

F-Secure Mobile Anti-Virus is capable of detecting Cardtrap.AH with generic detection, so if the phone has functional Anti-Virus installed Cardtrap.AH is blocked before it can be installed.

Installation to the MMC card Cardtrap.AH installs following Windows malware:

  • Virus.Win32.Kangen.a

to the phone's MMC card. The malware is installed with a filename, icon, and shortcut link that tries to fool the user into clicking on them.

More Support


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