Online education giant K12 Inc. has paid a ransom after their systems were hit by Ryuk ransomware in the middle of November. K12 creates tailored online learning curriculums for students to learn from home while in kindergarten through 12th grade. Most major systems, including payroll, accounting, and enrollment systems, were unaffected. However, the attackers gained access to some back-office systems that contained student data and other information. As part of the payment, K12 was assured by the threat actors that they would not release stolen data.
Source: https://www.bleepingcomputer.com/news/security/k12-online-schooling-giant-pays-ryuk-ransomware-to-stop-data-leak/