Ransomware is a type of malware that holds your computer hostage by locking files or systems screen and demands payment (like CryptoLocker Ransomware) to unlock the access. It can be downloaded while visiting a malicious or compromised websites, it can also downloaded by clicking a malicious email attachment.
Ransomware is a malware that installs in your computer by computer hackers. Once it installs in your computer, attacker encrypts your computer data, holds your computer hostage and demands payment for the decryption key.
WanaCrpytor 2.0 Ransomware
According to avast, there have been reports of 57,000 WanaCrypt0r 2.0 (aka WCry) infections in 99 countries, including the UK, US, China, Russia, Spain, Italy and Taiwan.