Malware
YourCyanide
aka GonnaCope · Kekpop · Kekware
According to Trend Micro, this is a ransomware written as a Windows commandline script, with obfuscation applied.
YourCyanide, also known as GonnaCope, Kekpop, Kekware, is a Windows malware family.
Background
Trend Micro reports that this is ransomware implemented as an obfuscated Windows command-line script.
Source: Malpedia (Fraunhofer FKIE).