Defensics is an automated black box fuzzing solution that discovers and identifies security weaknesses in software without requiring source code access. The tool performs fuzz testing by injecting invalid, malformed, or unexpected inputs into systems to reveal software defects and vulnerabilities, then monitors for exceptions such as crashes or information leakage. Defensics analyzes protocols, file formats, and network interfaces to reduce nonfunctional test cases and increase testing coverage accuracy. The solution includes over 250 prebuilt protocol test suites and offers a Suite Development Kit for creating custom model-based fuzzers for proprietary protocols and interfaces. Defensics integrates with development workflows through API and data export capabilities, enabling organizations to test software and device interoperability, robustness, and security.