The HildaCrypt and RobbinHood Ransomware have released their private decryption keys. A victim of the Muhstik ransomware has hacked back against his attackers and released close to 3,000 decrypted keys for victims along with a free decryptor to get their files back. Several companies from the automotive industry were targeted by BitPaymer operators in August by an Apple zero-day vulnerability that was used in an Apple software update. Several hospitals in Alabama have decided to pay ransom in order to receive a decryptor and get their computer systems back up and running.
Source: https://www.bleepingcomputer.com/news/security/the-week-in-ransomware-october-11th-2019-decryptors-released/