OWASP Four Clover


OWASP Four Clover is a versatile file integrity monitoring tool designed to bolster cybersecurity by ensuring the integrity of files, configurations, and critical data. By monitoring and detecting unauthorized changes, the tool provides a crucial layer of defense against malware, intrusions, and security breaches. Whether you’re safeguarding system files, tracking configuration modifications, or enforcing security policies, OWASP Four Clover simplifies the process with user-friendly commands and insightful reports.


  • Multi-Hash Support: Unlike some existing tools that may support only a limited set of hash algorithms for file verification, Four Clover offers support for a wide range of hash algorithms, including blake2b-256, blake2b-512, sha256, sha1, md5, and more. This flexibility allows users to choose the algorithm that best suits their security requirements.
  • Advanced Exclusion and Focus: Four Clover provides fine-grained control over which files are included or excluded from scans. The ability to exclude specific files or directories from scanning reduces noise and focuses attention on critical areas, enhancing the tool’s efficiency and effectiveness.
  • Focused Scans: The “focus” feature of Four Clover enables targeted scanning of files with specific extensions. This is particularly useful in scenarios where only certain file types are of concern, as it accelerates scan times and minimizes unnecessary overhead.
  • Comparative Analysis: While many tools offer file integrity monitoring, Four Clover takes a step further with its comparison functionality. It allows users to compare two scan reports and generate detailed reports highlighting the changes between them. This facilitates rapid detection of alterations, aiding in incident response and forensics.
  • Policy-Based Scanning: Four Clover introduces a policy-driven approach to file integrity monitoring. By defining policies based on specific rules, users can tailor scans to detect deviations from expected configurations. This mechanism empowers organizations to enforce security standards and practices more effectively.
  • Simplicity and Ease of Use: Four Clover is designed with user-friendliness in mind. Its intuitive command-line interface and clear reporting structure make it accessible to both novice and experienced users, reducing the learning curve and streamlining adoption.
  • Comprehensive Reporting: The tool generates comprehensive reports detailing scan results, changes, and findings. These reports offer detailed insights into alterations, supporting both compliance and incident response efforts.
  • Active OWASP Involvement: As part of the OWASP Foundation, Four Clover benefits from community-driven development, review, and security scrutiny. This level of collaboration ensures ongoing improvement and alignment with best practices.
  • Integration Capabilities: Four Clover’s extensible design enables integration into DevSecOps pipelines and other security toolchains. This seamless integration enhances the overall security posture of software development and deployment processes.
  • Responsive Development: Four Clover’s open-source nature fosters a responsive development community. The tool can evolve rapidly to address emerging threats and adapt to changing cybersecurity landscapes.


    The OWASP Watchman Project is licensed under the Apache License, Version 2.0. It allows for free use, modification, and distribution of the software, as long as the license terms are respected.


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