DotRansomware

DotRansomware is a RaaS (ransomware as a service) that cyber criminals can buy from dark web markets. Upon infection it uses the powerful encipher algorithm AES to encode target data appending a malicious extension to the encrypted files at the end of the process. Then it drops an HTML file that is the ransom message send by the crooks. They demand a ransom payment in order to decrypt all infected files.

Source:
http://bestsecuritysearch.com/dotransomware-removal-recovery/