1. Skip to navigation
  2. Skip to content
  3. Skip to sidebar



April 06, 2005



Also known as a trojan horse program, this is a deceptive program that performs additional actions without the user's knowledge or permission. It does not replicate.

Disinfection & Removal

Automatic Disinfection

F-Secure Mobile Anti-Virus will detect Fontal.A and delete the trojan's components.

  • 1. Open web browser on the phone
  • 2. Go to http://mobile.f-secure.com
  • 3. Select link "Download F-Secure Mobile Anti-Virus" and then select phone model
  • 4. Download the file and select open after download
  • 5. Install F-Secure Mobile Anti-Virus
  • 6. Go to applications menu and start Anti-Virus
  • 7. Activate Anti-Virus and scan all files


After disinfecting the phone, remove the remaining empty directories by going to the Application Manager and uninstalling the SIS file in which Comwarrior arrived (Kill Saddam By OID500.sis).

Manual disinfection

1. Install file manager on the phone

2. Go to c:\System\apps\appmngr

3. Delete appmngr.app

4. Go to the application manager

5. Uninstall the SIS file in which the Fontal.A was installed in

Disinfection for the cases when phone is already rebooted and cannot start up

CAUTION! this method will remove all data on the device including calendar and phone numbers.

  • 1. Power off the phone
  • 2. Hold following three buttons down "answer call" + "*" + "3"
  • 3. Keep holding the buttons and power on the phone
  • 4. Depending on the model, you either get text "formatting" or startup dialog that asks for initial phone settings
  • 5. Your phone is now fomatted and can be used again

Technical Details

Trojan:SymbOS/Fontal.A is distributed in a malicious SIS file named 'Kill Saddam By OID500.sis'. If executed, it installs a corrupted Font file onto the device, causing the device to fail at next reboot.

In addition to installing the corrupted font file, Fontal.A also damages the application manager so that it cannot be uninstalled. No new applications can be installed before the phone is disinfected.

If a phone is infected with Fontal.A, it must not be rebooted as the trojan will prevent the phone from booting again.

If the phone is rebooted, it will try to boot, but will be forever stuck on phone startup and cannot be used.


When the Fontal.A SIS file is installed the installer copies files into following locations:

  • \system\apps\appmngr\appmngr.app
  • \system\apps\kill sadam\kill sadam.app
  • \system\apps\fonts\kill sadam font.gdr

The appmngr.app is a non-functional file that disables the application manager; the kill sadam.app is a hexedited utility that has been modified to show text reboot and has no other significant function for the trojan.

Submit a sample

Wondering if a file or URL is malicious? Submit a sample to our Lab for analysis via the Sample Analysis System (SAS)

Give And Get Advice

Give advice. Get advice. Share the knowledge on our free discussion forum.

Keep your mobile device protected

F-Secure Mobile Security will keep your mobile device protected on the go and enable you to find it in case you lose it