KeyRaider - Definition from the Hotspot Shield Glossary
KeyRaider is a form of malware that specifically affects Apple devices using the iOS operating system such as iPhones and iPads. This malware allows the attackers to obtain a user’s password and username and then lock the device so the user cannot gain access to it.
Typically once the device is locked, the attacker may request a ransom before they give control of the device back to the user. The malware was discovered in 2015 by a Chinese business and it is reported to have affected over 225,000 devices to date. Many cyber-security experts have labelled it as one of the most damaging pieces of malware found to date. One notable point is that the KeyRaider malware can only affect Apple devices that have been Jailbroken (the process of removing software restrictions on apple devices and giving root access to the user).