Interesting to see the computer virus now mutating itself into the smartphone virus. Interesting, but certainly not welcome if you happen to be an Android smartphone owner.According to TechRadar, Kaspersky Labs has discovered what's described as an 'sms Trojan'. Disguised innocently as a media player, once installed, it has a nasty habit of sending out premium rate text messages. Which just might give you a nasty surprise when your bill hits the doormat at the end of the month.Ok, that's the bad news. Here's the good news. Kaspersky claims this is aimed at Russian Android users, with a worldwide threat described as 'low'. So it's unlikely to be tempting you in anytime soon - unless you happen to be one of our Russian readers.Google has issued a statement, essentially asking users to think before they say 'yes': 'Our application permissions model protects against this type of threat. When installing an application, users see a screen that explains clearly what information and system resources the application has permission to access, such as a user's phone number or sending an SMS.'Users must explicitly approve this access in order to continue with the installation, and they may uninstall applications at any time. We consistently advise users to only install apps they trust. In particular, users should exercise caution when installing applications outside of Android Market.'