This report, prepared as part of an IT security consultancy, delves into the pervasive threat of ransomware. It begins with an introduction to ransomware attacks and their societal impacts, emphasizing the vulnerability of organizations like ITech that rely on data centers. The report then examines three prominent ransomware variants: CryptoLocker, Cerber, and WannaCry, detailing their characteristics and methods of operation. A crucial section elucidates the working mechanism of ransomware, explaining how attackers exploit vulnerabilities to encrypt data and demand ransoms. The report concludes by outlining the potential threats posed by ransomware, including data breaches, data loss, and financial losses, providing a comprehensive overview of the risks and challenges associated with this form of cyberattack. This report is a valuable resource for understanding and mitigating the risks associated with ransomware attacks.