High-profile ransomware attacks continue to bombard industry and governments worldwide. Increasingly, global efforts to combat it are focused on cryptocurrencies, which facilitate almost all ransomware payments and allow criminals to more easily obfuscate proceeds via ‘tumblers’, ‘mixers’ and other methods. In this Sanctions Masterclass, our expert panel will examine cryptocurrency-linked ransomware sanctions risks, identifying common red flags of ransomware payments, challenges of determining a sanctions nexus, typologies of ransomware rings, and key considerations for adjusting anti-financial crime controls to mitigate ransomware risks.