Pierluigi Paganini of Security Affairs on Locker ransomware author allegedly releasing database dump of command-and-control private keys:

Allegedly, the author of the “Locker” ransomware has uploaded a dump of the C2 server database, releasing private keys of infected hosts worldwide to the public.  The “author” claims that the release was a mistake, that no further keys will be utilized for encryption, and that automatic decryption of all affected hosts will begin on June 2nd.

Based on a brief analysis, the file seems non-malicious and does contain a large quantity of RSA keys. The CSV file contains Bitcoin addresses and RSA keys.

This appears to have been an accident.