Security researchers from AhnLab, a South Korea-based cyber-security firm, have created decrypters for some versions of the Magniber ransomware. The ransomware first appeared in mid-October 2017 and has been only infecting South Korean users. Researchers have been releasing new decrypter decries on almost a daily basis, so we expect this table to become outdated in a few days. The company has been releasing updates on its tools on a regular basis, with new ones being released every day.
Source: https://www.bleepingcomputer.com/news/security/decrypters-for-some-versions-of-magniber-ransomware-released/