Ransomware is now one of the fastest growing classes of malicious software. In the last few years it has evolved from simple screen blockers demanding payments to something far more dangerous. In order to decrypt these files the criminals demand a payment often a significant sum. This new family is detected by Kaspersky Lab as Trojan-Ransom.Win32.Onion. Its developers used both proven techniques tested on its predecessors and solutions that are completely new for this class of malware.”]
Source: https://securelist.com/a-new-generation-of-ransomware/64608/