Ransomware attacks have become the number one threat in the cyber domain. These attacks succeed for two reasons: the high profitability of operations and the virtual impunity of the perpetrators. Following the publication of our report, Cyberthreat: Storm Warning (Cybermenace: avis de tempête), we have published a series of articles in order to examine the threat and to search for ways to reduce the profitability, frequency and impact of attacks.