Threat Descriptions

Trojan:SymbOS/Doomboot.Q

Classification

Category :

Malware

Type :

Trojan

Platform :

SymbOS

Aliases :

SymbOS/Doomboot.Q, Trojan:SymbOS/Doomboot.Q, SymbOS/Doomboot.Q

Summary

Trojan:SymbOS/Doomboot.Q installs corrupted system binary files, which then cause the phone to crash at the next reboot.

Removal

F-Secure Mobile Security will detect and disinfect Doomboot.Q

  • Remove the SIS file in which the Doomboot.Q was installed
  • Open web browser on the phone
  • Go to http://phoneav.com
  • Select link "Download antivirus software for your smartphone" and then
  • Select phone model
  • Download the file and select open after download
  • Install F-Secure Mobile Anti-Virus
  • Go to applications menu and start Anti-Virus
  • Activate Anti-Virus and scan all files

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

Trojan:SymbOS/Doomboot.Q affects devices running the Symbian S60 operating system. It is distributed in a malicious SIS file and when executed, installs corrupted system binary files. If the device is rebooted, on startup it will load the corrupted binaries, which then cause the phone to crash. Technically, Doomboot.Q is very similar to the previously released variant, Trojan:SymbOS/Doomboot.C.

Note: If the device has been infected with Doomboot.Q, it is important not to restart it before disinfection has been completed. Follow the disinfection instructions below. If the device has been rebooted and will not start again, it may be recovered with teh hard format key code that is entered during the phone's startup.