Users of mobile phones running the Symbian OS are vulnerable to a trojan contained in an illegally adapted version of the Mosquitos game, Symbian said on Thursday.
The illegal game is being distributed by 'warez' Web sites (illegal software download sites) and on peer-to-peer (P2P) networks. It may cause the phone to send text messages to premium rate numbers in the U.K., Germany, the Netherlands and Switzerland without the user's approval or knowledge, Symbian said.
The cracked Mosquitos game runs only on phones using the Series 60 User Interface platform. The trojan can be removed by uninstalling the game, according to Symbian.
Symbian urged users to only download software from trusted sources, particularly those carrying the Symbian Signed certification which validates the identity of the application's developer.
Symbian said the emergence of the Mosquitos trojan emphasizes that mobile phones users need to be aware of the risks of downloading and installing illegal or pirated software.