Bootton.D is a SIS file trojan that is quite similar to SymbOS/Bootton.A
Symbian trojan.
Bootton.D contains files from Skulls.A, Skulls.D and Bootton.A, Doomboot.A
and drops Doomboot.A and Cabir.G on the device.
Like Bootton.A Bootton.D replaces system applications with application that
causes system to reboot. And as the Bootton.D also contains corrupted binaries
taken from Doomboot.A the device will not boot again.
If the menu application was running when Bootton.D was installed,
pressing menu button will give normal application menu with
most applications replaced with the application that
reboots the device. If the menu application was not running, pressing
menu button will reboot the device.
Bootton.D disables most of critical system functions and third party
file managers, so that even if the device wouldn't immediately reboot
it is still unusable before it is disinfected.
In addition of disabling applications on the phone, the Bootton.D also
installs modified Cabir that SymbOS/Onehop.A uses to distribute Bootton.D.
But this file does not get executed automatically, if user executes it manually
it will try to send SymbOS/Doomboot.A to other devices over bluetooth.
Like Skulls.A the Bootton.D replaces the application icons with it's own
icon, this time the icon is a heart icon with the text "I-Love-U"
If Bootton.D is installed only the calling from the phone and answering
calls works until the device is rebooted. After reboot the only known method
of recovering is to hard format the device.
Disinfection
Disinfection with two Series 60 phones
Please note that this disinfection method works only with phones on which the
memory card can be changed without powering down the device.
1. Install F-Skulls.sis into infected phones memory card with a clean phone
2. Put the memory card with F-Skulls into infected phone
3. The F-Skulls starts automatically and frees the menu button and application manager
4. Press menu button until you get Symbian process menu, look for any applications with heart
icon. Kill the application processes with 'C' button.
5. Go to application manager and uninstall the SIS file in which you installed the Bootton.D
6. Download F-Secure Mobile Anti-Virus from http://phoneav.com and activate the Anti-Virus
7. Scan the phone and remove any remaining components of Bootton.D
8. Remove the F-Skulls with application manager as the phone is now cleaned
Payload
Bootton.D installs small component that resets the
device if executed, this component is installed into locations where
it replaces system and third party applications.
If the device is rebooted the Bootton.D prevents the device from starting
up.
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