Threat Descriptions

Trojan:SymbOS/Romride.J

Classification

Category :

Malware

Type :

Trojan

Platform :

SymbOS

Aliases :

Trojan:SymbOS/Romride.J

Summary

Trojan:SymbOS/Romride.J affects devices running the Symbian S60 operating system. It is distributed in a malicious SIS file and when executed, installs components that cause the phone to 'crash', essentially becoming useless.

Removal

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

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

On execution, Romride.J installs malfunctioning system component configurations. These components are designed to cause effects on the device, which may differ based on the version of ROM software installed. The message "Attack Successfully" is displayed, then the phone is immediately rebooted.

The effects produced by the system components are not seen, as Romride.J also installs a bootstrap component that reboots the phone every time it attempts to complete startup, leaving the phone in a continuous reboot loop.