Technical details: https://news.sophos.com/wp-content/uploads/2020/06/glupteba_final-1.pdf https://news.sophos.com/wp-content/uploads/2020/06/glupteba_... Page

Technical details: https://news.sophos.com/wp-content/uploads/2020/06/glupteba_final-1.pdf https://news.sophos.com/wp-content/uploads/2020/06/glupteba_... Pages 30-32 describe the command and control server update mechanism using blockchain.