Cyber OSINT Handbook: A Practical Guide to Digital Investigations, Threat Intelligence, and Online Attribution

The Cyber OSINT Handbook is a practical guide to discovering, analyzing, and validating intelligence from publicly available information. Designed for investigators, cybersecurity professionals, intelligence analysts, researchers, and students, it transforms scattered online data into structured, defensible findings.Readers learn how to investigate people, organizations, digital infrastructure, social media, geolocation data, domains, IP addresses, wireless environments, and cryptocurrency activity. The handbook covers advanced search techniques, passive DNS, WHOIS and RDAP analysis, Shodan and Censys, metadata extraction, identity correlation, threat-infrastructure mapping, and evidence preservation.More than a collection of tools, this book emphasizes the human judgment behind effective investigations. It provides repeatable workflows, controlled laboratories, operational playbooks, professional diagrams, and practical reporting templates while reinforcing ethical conduct, legal compliance, source validation, and responsible attribution.Whether supporting cybersecurity operations, conducting due diligence, assessing digital exposure, or developing investigative skills, the Cyber OSINT Handbook provides a disciplined framework for turning open-source information into reliable, actionable intelligence.