This scientific article explores the approach to protecting Active Directory from threats associated with ransomware, which are becoming increasingly perilous to corporate information systems. The concept of "zero trust" in the context of Active Directory is defined as an approach aimed at eliminating trust from the security framework and constantly verifying the compliance of users and their devices with configured security policies, context, and other parameters. The article delves into methods and tools that enable the implementation of the zero trust concept within the Active Directory environment, including behavior analysis, network traffic monitoring, and the utilization of advanced security rules. The importance of combining event processing technologies and artificial intelligence for automated detection and response to abnormal activity is also investigated. The research findings indicate the potential to enhance the effectiveness of protecting Active Directory from ransomware threats and ensuring the resilience of corporate networks against them. The adoption of the zero trust concept could be a significant step in ensuring cybersecurity and maintaining the reliability of information resources in modern enterprises