Explore the evolving threat of ransomware in this Black Hat conference talk. Delve into the emergence of CryptoLocker, the first ransomware to implement encryption correctly, and its impact on security research and countermeasures. Learn about the threat intelligence community's response, including the development of near-real-time infrastructure tracking. Examine various ransomware campaigns, their techniques, and the collaborative efforts between industry and law enforcement to combat this growing threat. Gain insights into the differences between symmetric and asymmetric encryption, domain generation algorithms, and Bitcoin's role in ransomware operations. Discover the importance of backups, community response, and working groups in addressing ransomware challenges. Analyze the impact of ransomware on businesses and individuals, and explore strategies for resilience and prevention against this lucrative cybercrime trend.