RommWar.B

Classification

Malware

Trojan

SymbOS

RommWar.B, ROMSilly.A

Summary

SymbOS/RommWar.B is a malicious SIS trojan that installs a malfunctioning system component that causes the device to reboot and prevents the device from starting up after the reboot.

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

Knowledge Base

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User Guide

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Contact Support

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Submit a sample

Submit a file or URL for further analysis.

Technical Details

Installation to System

SymbOS/RommWar.B installs a malfunctioning system binary into the C: drive of the phone as a bootstrap component. This is followed by different effects depending on the version of the ROM software on the device. Effects witnessed include a reboot of the device and failing to start up after the reboot.

Payload

Installs a corrupted system binary as a bootstrap component.