Owners of iPhone in Australia reported that a worm attacked and changed their wallpaper to Rick Astley image, a 1980 pop crooner. The worm is capable of breaking into jailbroken iPhones if their owners have not changed the default password after installing SSH, according to Sophos.com. On each installation, the worm - written by a hacker calling themselves “ikex” - changes the lock background wallpaper to an image of Rick Astley with the message: “ikee is never going to give you up”.