Some Nokia Smartphone users are reporting that they are unwittingly downloading a virus called “Skulls”. The malicious virus replaces all of the desktop icons with images of skulls. It appears to be spreading via Bluetooth connection. More info:

Spread by Bluetooth, a short-range radio link used by most high-end cellphones to exchange phonebook entries, images and ringtones, the proof-of-concept worm installed itself before politely asking if it may be allowed to propagate.

Skulls however behaves more like a computer virus - it arrives in the form of a Trojan disguised as a free phone wallpaper.

The program is labelled as a file called 7610.extended.theme.manager.zip.

So far the virus appears to affect only Nokia 7610 smartphones, the firm’s first megapixel cameraphone.

Once installed the program replaces all the working applications, such as contacts, calendar, notebook, with non-working versions so the phone becomes almost useless

[via IOL]

Extended info about the virus and removal can also be found at F-secure.