Although this blog is aimed at admins of Windows networks, we recognize that in today's heterogeneous network environments, you're likely to have clients running non-Windows operating systems somewhere in the mix. Many mostly-Windows shops have a Linux web server or Mac workstations doing graphics, so you have to keep up with the threats that affect those machines, too.
And if you think there's no need to worry about malware on Linux and Mac machines, think again. The latest OS X threat is called Flashback, and it's a Trojan that purports to be a version of Adobe's Flash Player. Its authors are particularly persistent, constantly modifying it to get around malware detection software. The most recent version was discovered on Friday the 13th. Read more here: