Fontal.I is a SIS file trojan that installs corrupted Font file into infected device, thus causing the device to fail at next reboot. Fontal.I also tries to disable Kaspersky Anti-Virus for Symbian, currently it is still unverified whether this attempt is successful or not.
Fontal.I pretends to be Nokia Anti-Virus for Symbian devices, when installed the Fontal.I will show following installation text:
Nokia Anti-Virus keep your phone protected from mobile virus. Please restart your phone after installation complete to activate your anti-virus product. If you found any problem regarding this software, please call :
If a phone is infected with Fontal.I, 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.
F-Secure Mobile Security will detect Fontal.I and delete the trojan components.
More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.
You may also refer to the Knowledge Base on the F-Secure Community site for more assistance.
After disinfecting the phone, remove the remaining empty directories by going to the Application Manager and uninstalling the SIS file in which Fontal.I arrived (Nokia Anti-Virus.sis)
CAUTION! this method will remove all data on the device including calendar and phone numbers
When the Fontal.I SIS file is installed the installer copies files into following locations:
F-Secure Mobile Anti-Virus for Symbian detects this malware starting from the
Detection Type: Mobile
Database: update build number 35