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Trojan:SymbOS/Flerprox.C

Name : Trojan:SymbOS/Flerprox.C
Category:Malware
Type:Trojan
Platform:SymbOS
Date of Discovery:September 25, 2006

Summary

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.

Disinfection

Disinfecting using F-Secure Mobile Anti-Virus
  • Download F-Secure Mobile Anti-Virus from http://f-secure.mobi
and activate the Anti-Virus
  • Scan the phone and remove any components of the malware
  • Reboot the phone to remove memory resident components

Disinfection for the 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

To prevent future infections, please download F-Secure Mobile Anti-Virus from here: http://f-secure.mobi.

Additional 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

Detection

F-Secure Mobile Anti-Virus for Symbian detects this malware starting from the update build number 121.