This week was mostly about in-dev ransomware or new variants of older ransomware being released. The biggest news was the File Spider Ransomware campaign that was targeting countries in the Balkans. The other big news, though a ransom and not ransomware, was what appears to be the entire California voters database being leaked on the Internet and now being held for ransom. The details of over 19 million California voters were left exposed online in an unsecured MongoDB database and were later held for. ransom.
Source: https://www.bleepingcomputer.com/news/security/the-week-in-ransomware-december-15th-2017-file-spider-california-voters-database-and-more/