Date: 08 Nov 2018
Estimated value: 3 900 000
Ryuk is a ransomware threat that has been targeting businesses, hospitals, government institutions, and other organizations since 11 August 2018. The group behind the malware is known for using manual hacking techniques and open-source tools to move laterally through private networks and gain administrative access to as many systems as possible before initiating the file encryption. Unofficial media reports indicate that the possible perpetrators may be the Lazarus Group or the Wizard Spider.