New ransomware Jaff demands $3,700 payments

Attackers behind the highly successful Locky and Bart ransomware campaigns have returned with a new creation: A malicious file-encrypting program called Jaff that asks victims for payments of around $3,700. Like Locky and Bart, Jaff is distributed via malicious spam emails sent by the Necurs botnet, according to researchers from Malwarebytes. Necurs first appeared in…