Virus writers are attempting to trick music fans into opening malicious code with a message purporting to arise from an FBI investigation into illegal file trading.

Recipients of the bogus warning are told they are under investigation. Infectious emails contain an attachment allegedly containing evidence against the 'accused' which actually contains Windows malware, the Melbourne Age reports

The message appear authentic but closer inspection reveals factual errors and spelling mistakes that give the game away. That said, it's easy to see how the message could fool people.

This is the sneakiest piece of social engineering by a virus writer that we can recall. ®