Cybercriminals continue to double down on crypto-ransomware attacks. Ransomware can remotely encrypt and lock PCs, leaving them incapable of doing anything more than displaying a ransom note that tells victims how to obtain and transfer bitcoins to the attacker. Some ransomware-as-a-service offerings automatically log incoming payments and generate decryption keys. Some crooks even run “customer service” centers to provide technical advice to their victims and occasionally allow them to negotiate lower ransom payments or deadline extensions. Trend Micro counted a total of 29 new ransomware families in 2015.”]
Source: https://www.careersinfosecurity.com/blogs/cant-stop-ransomware-p-2235