A worm that installs a 'Safety Browser', plays screeching music and dumps a graphic on the victim's desktop is circulating via IM...IM security company FaceTime Communications described the malware, which it calls "yhoo32.explr", as "insidious"...When the link is clicked, a worm installs the so-called 'Safety Browser', a program that leads the user to pages mined with adware and viruses...The Safety Browser uses an Internet Explorer logo to make it look more legitimate.