Summary
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.
Removal
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
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.
Execution
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.
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