A fraudster calling himself Oleg Pliss is targeting Apple iPhones and iPads with an attack that prevents the user from unlocking the phone and displaying a message of where to send $100 to have the device unlocked. Details about the exploit are still being investigated, but it seems to be targeting devices via compromised iCloud accounts.
Ransomware is a type of malware that attempts to take a device hostage and requires payment to give control of the device back to the user, although sending payment does not guarantee the malware will relinquish control. While this type of malware has targeted computers for several years and has also targeted Android mobile devices, this is the first reported incidence affecting iOS devices. These attacks were originally concentrated in Australia but have since spread to the U.S. and elsewhere.