Ransomware is a type of malware that prevents or limits users from accessing their system. This type of malware forces its victims to pay the ransom through certain online payment methods in order to grant access to their systems, or to get their data back. Some ransomware encrypts files (called Cryptolocker). Other ransomware use TOR to hide C&C communications (called CTB Locker). The ransom prices vary, ranging from £16 ($USD 24) to more than £425 ($USD 600), or even its bitcoin equivalent. It is important to note, however, that paying for the ransom does not guarantee that users can eventually access the infected system. Users may encounter this threat through a variety of means. Ransomware can be downloaded by unwitting users by visiting malicious or compromised websites. It can also arrive as a payload, either dropped or downloaded by other malware. Some ransomware are delivered as attachments to spammed email. Once executed in the system, a ransomware can eit...
