This book offers a comprehensive exploration of the infamous WannaCry ransomware attack that swept across the globe in 2017. It delves into the origins of the attack and its unprecedented spread, as well as the impact it had on individuals, organizations, and governments. Through detailed analysis and expert interviews, the book examines the technical aspects of the attack, the methods used by the attackers, and the vulnerabilities that were exploited. It also explores the political and economic fallout of the attack, including the response of governments and the wider cybersecurity community. In addition, the book offers insights and lessons learned from the WannaCry attack, highlighting the importance of proactive measures and ongoing awareness in the face of emerging cyber threats. It serves as a valuable resource for individuals, organizations, and policymakers seeking to better understand the complex landscape of cybersecurity in today's digital world. Overall, this book provides a detailed and accessible account of the WannaCry ransomware attack, offering a thorough exploration of its causes, impacts, and implications for the wider cybersecurity landscape.