YiSpecter is a network worm on iOS. It is one of the first malware programs to work on both jailbroken and non-jailbroken devices. It only works on iOS 8.4 and below.
After YiSpecter has infected the device, it will install various programs and launch them.
Safari's settings will be modified to send private information to a remote server.
Apps that are run will be replaced by full screen advertisements.