This week we see STOP Ransomware becoming the most widespread ransomware targeting consumers and the enterprise that we have seen in a long time. This is due to a constant stream of variants being released, with a large amount of victims being infected through adware bundles promoted through crack sites. The STOP ransomware has seen very heavy distribution over the last month using adware installers disguised as cracks. A new strain of ransomware has been observed targeting Bitcoin mining rigs. At the time of writing, most of the infections have been reported in China.
Source: https://www.bleepingcomputer.com/news/security/the-week-in-ransomware-january-25th-2019-stop-wont-stop/