Scammers have hidden a nasty surprise for users who downloaded doctored copies of a Windows Mobile game.
Hackers adapted a demo version of 3D Anti-Terrorist Action to include a Trojan that makes premium-rate calls costing around US$6 a minute on the sly. Doctored copies of the Counter-Strike-alike game are designed to call premium-rate phone numbers in the Antarctic, the Dominican Republic and Somalia, leaving users none the wiser until they received whopper mobile phone bills.
It adds that even legitimate versions of the application lack engaging gameplay.
Screenshots of the application, along with extracts from a UK victim's email, can be found in a blog post by Sophos here. The net security firm reckons a Russian-language speaker wrote the malware behind the attack. ®