The worm, called iKee, infects jailbroken iPhones by utilizing the SSH service on the phones, which uses the default password and allows remote logins. The worm takes several actions after infecting a phone, including changing the phone s background image to a photo of Rick Astley. An analysis by the SANS Internet Storm Center shows all 3G customers in Australia are affected. There was a somewhat similar worm that surfaced last week, attacking iPhone users in the Netherlands and demanding a small payment to disinfect the iPhone.
Source: https://threatpost.com/iphone-worm-circulating-wild-110809/73050/