It had to happen eventually, but calling OS X “the new Windows 98” has got to hurt. The first-ever Mac Trojan is a nasty little bug.

The OS X Trojan, which infects a computer after a user chooses to download a proprietary codec, hijacks the infected computer’s DNS settings. Internet-connected applications use DNS settings to figure out how to translate URLs, such as Wired.com, into the physical address of a server, according to Intego’s alert. By hijacking the DNS, the Trojan is able to redirect visits to sites such as banks, eBay and PayPal to fake websites that attempt to harvest user’s logins and passwords to commit financial fraud.

The days of Mac’s imperviousness to every last hacker with an attitude may be over.