Apple on Wednesday updated the malware engine included with Snow Leopard to detect the newest version of MacDefender. The latest update was the latest in what researchers have called a cat-and-mouse game between Apple and the cyber criminals shilling bogus security software. Apple updated XProtect, the bare bones anti-malware tool tucked into Mac OS X 10.6, aka Snow Leopard, shortly after 2 p.m. PT Wednesday. Apple initially updated Snow Leopard on Tuesday with signatures to sniff out previous versions of the “scareware””]
Source: https://www.csoonline.com/article/2128597/apple-strikes-back-at-newest-mac-scareware.html