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Trojan:SymbOS/Fontal.A

First posted on 12 July 2010.
Source: SecurityHome

Aliases :

There are no other names known for Trojan:SymbOS/Fontal.A.

Explanation :

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.

Additional DetailsTrojan: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.

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.

Last update 12 July 2010

 

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