Flerprox.C is a malicious SIS trojan that installs an executable file and a number of other malware and malware components. The executable file causes the device to restart on installation and the installed malware components prevent the device from rebooting. If your phone have rebooted and will not start again, the phone can be recovered with the hard format key code that is entered during the phone boot.

Disinfecting using F-Secure Mobile Security

  • Download F-Secure Mobile Security and activate it
  • Scan the phone and remove any components of the malware
  • Reboot the phone to remove memory resident components

Disinfection for cases when phone cannot start up

CAUTION This method will remove all data on the device, including calendar and phone numbers.

  • Power off the phone
  • Hold the following three buttons down - "answer call" + "*" + "3"
  • Keep holding down the buttons and power on the phone
  • Depending on the model, you will either get text that reads "formatting" or a start-up dialog that asks for the initial phone settings
  • Your phone is now formatted and can be used again

Suspect a file is incorrectly detected (a False Positive)?

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 detection database 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.

For more Support


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User Guide

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Submit a sample

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Technical Details

Installation to System

Flerprox.C installs an executable file and malware. The executable file causes the device to restart on installation and the installed malware components prevent the device from rebooting. The following malware and malware components are installed from the Flerprox.C installation package:

  • Panic.gdr from SymbOS/Blankfont.A
  • Kill Sadam Font.gdr from SymbOS/Fontal.A
  • SymbOS/Trojan-spy.Flexispy.A
  • SymbOS/Mquito.A
  • SymbOS/StealWar.A
  • SymbOS/RommWar.A
  • SymbOS/Cardtrap.A
  • SymOS/Romride.K
  • SymbOS/Doomboot.Q
  • SymbOS/Cardblock.B
  • SymbOS/Feak.C
  • SymbOS/Drever.E