SEC587 provides an in-depth exploration of advanced techniques for gathering and analyzing open-source intelligence (OSINT) in cybersecurity. The course teaches participants how to effectively leverage publicly available data—from social media and websites to government databases and deep web sources—to uncover potential security threats and vulnerabilities. Students will learn how to use OSINT tools for real-time threat intelligence, competitor analysis, and threat actor profiling. Emphasizing practical, hands-on exercises, SEC587 enhances the ability to conduct in-depth investigations, identify attack vectors, and anticipate cyber threats, all while adhering to legal and ethical standards.