An issue originally reported by Dr. Web indicates that almost 600,000 Macs – mostly in the U.S. and Canada – have been infected with a trojan horse virus dubbed, “Flashback.”

(451Press.com) -- Flashback was originally discovered in September 2011 and was designed to disguise itself as an Adobe Flash Player installer, using Flash player logos. After installing Flashback, the malware seeks out user names and passwords that are stored on your Mac.

The resurgence of Flashback appears to take advantage of Java runtime for OSX. Apple issued a patch this week though it didn’t mention Flashback by name. The patch is available for OSX 10.6 and 10.7 as well as for OSX Lion 2012-001.