twoheadedboy writes: "A Flashback variant dubbed Backdoor.Flashback.39 has infected over 600,000 Macs, according to Russian security firm Dr Web. The virulent Flashback trojan infecting Apple machines sparked interest earlier this week after it was seen exploiting a Java vulnerability, although it was actually first discovered back in September last year. The Trojan has a global reach after Dr Web found infected Macs in most countries. More than half of the Macs infected are in the US (56.6 percent), while another 19.8 percent are in Canada. The UK has 12.8 percent of infected Macs."