The Cryptowall ransomware has enjoyed significant success in the emerging malware-as-a-service (MaaS) market. Version 4.0 encrypts file names along with the files themselves, making it impossible for users to target specific, high-value information as their first decrypt targets. Ransomware is on the way up for 2016, but its tempting to think of the problem as largely a user issue enterprises have more to fear from data breaches than information encryption.”]
Source: https://securityintelligence.com/news/cryptowall-4-0-now-part-of-a-bad-news-bundle/