Threat description




Trojan:SymbOS/Romride.A installs a malfunctioning system configuration file.


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

Technical Details

Trojan:SymbOS/Romride.A is a malicious SIS trojan that installs malfunctioning system configuration components that cause different behavior depending on the ROM software version on the device.

If the phone is rebooted and subsequently will not start again, it can be recovered with a hard format key code entered at boot.


The SIS trojan is distributed in a file named "Nokia Live.sis".

Romride.A installs a malfunctioning system configuration files into the C: drive of the phone.


Romride.A causes different effects depending on the version of the ROM software on the device. Effects witnessed vary from start up failure, to no apparent effect at all.

Shortly after the device infected with SymbOS/Romride.A restarts, it shows a notification similar to the picture below:

When this notification is displayed the only working function on the device is the option to power-off.

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