People who name their bug Crisis have some high aspirations. And since they didn't want anybody to feel left out, they devised a multiplatform that invited both Mac and PC users to their party. The malware, which deployed over the summer, gets carried in by a Java archive file masquerading as components of Adobe Flash Player. At that point, a file called WebEnhancer determined whether it has hit Windows or Mac OS X, and then deploys the attack best suited to its host. For Mac users, that included config changes plus a back door and root kit.