Researchers from FireEye and CrowdStrike released reports this week that explain how Ryuk partnered with TrickBot in an access-as-a-service to gain access to infected networks. Other reports also lead researchers to believe that the attackers behind Ryuk are Russian, rather than North Korean. Ransomware is coming up with some pretty low life schemes in order to coerce victims into paying ransom. The City Hall of Del Rio, Texas was hit by a ransomware attack on Thursday, which led to multiple computers on the network being turned off and disconnected from the Internet to contain and analyze the malware.
Source: https://www.bleepingcomputer.com/news/security/the-week-in-ransomware-january-11th-2019-access-as-a-service/