Last week, security firm Bitdefender, the Romanian Police, and Europol allegedly gained access to GandCrab Ransomware’s Command & Control servers. This allowed them to recover some of the victim’s decryption keys. After this breach, the developers said they would release a more secure version of the ransomware. At this time, victims cannot decrypt their files for free. The new ransom note name is CRAB-Decrypt.txt and now includes instructions on contacting the devs through the Tox instant messaging service.
Source: https://www.bleepingcomputer.com/news/security/gandcrab-ransomware-version-2-released-with-new-crab-extension-and-other-changes/