Turn public information into verified, documented intelligence for responsible defensive investigations
Explain how OSINT supports defensive investigations and define verification habits for producing defensible outputs.
Determine what to collect, document authorization and minimization, and handle OSINT evidence within legal and ethical boundaries.
Translate a threat-intelligence need into search hypotheses, terms, and source choices while accounting for collection bias.
Evaluate domains, IPs, hashes, and URLs through reputable lookups and combine signals into a confidence-backed assessment.
Apply documented workflows for leak and breach monitoring, triage, notification, and external attack-surface tracking.
Produce reproducible investigation notes and a final case brief that records sources, timestamps, confidence, evidence, and limits.
5 sections · 9 lessons
Define the role of OSINT in defensive investigations and set ethical, legal, authorization, minimization, and evidence-handling boundaries for responsible collection.
2 lessonsTranslate threat-intelligence needs into focused search hypotheses, then corroborate domains, IPs, hashes, and URLs into confidence-backed assessments.
2 lessonsBuild responsible workflows for breach and credential-leak monitoring while inventorying and validating an organization’s internet-exposed assets and identities.
2 lessonsProduce reproducible notes for incident response, diagnose failures in sourcing, bias, and documentation, and apply a fix-up workflow.
2 lessonsExecute an end-to-end investigation for a realistic incident lead and deliver a defensible brief with evidence and limits.
1 lessonDefensive investigations depend on public information, but useful OSINT requires more than finding a promising result. This course develops a disciplined practice for defining collection boundaries, testing threat-intelligence questions, corroborating indicators, monitoring exposure, and documenting evidence. It is designed for security professionals who need investigation outputs that support incident response, withstand review, and clearly distinguish evidence from uncertainty.
The course covers defensible OSINT investigations, collection authorization and minimization, threat-intelligence search hypotheses, IOC lookups, leak and breach monitoring, external attack-surface discovery, incident-ready notes, and failure analysis. It concludes with an end-to-end investigation brief that states evidence and limits.
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Anything from using AI for project planning and analysis to improving workflows, decision-making, communication, and delivery. If you can describe the skill or task, Fenzo can build a course around it.
Yes. Tell Fenzo what you do, what you’re trying to accomplish, and where you’re stuck, and Fenzo will shape the course around your role, your goals, and the work you actually have to do.
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See Fenzo for BusinessYou start by describing your goal or taking a short skill benchmark. Fenzo uses that context to identify gaps and shape the learning experience around them.
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Something to operate in every section.
Three findings from decades of learning research shaped how every Fenzo lesson is built.
Average pass rate · Freeman et al., PNAS 2014
What the science says
Students in lecture-only classes are 1.5× more likely to fail.
How Fenzo does it
Every Fenzo lesson is interactive. No passive reading or watching, ever.
You work through itAI does it for you
Skill retention over time · with vs. without practice
What the science says
Offloading thinking to AI erodes the very skills you’re trying to build.
How Fenzo does it
Fenzo makes you do the thinking — guided, but never done for you.
Retrieval practiceRe-reading
Long-term recall · retrieval vs. re-reading
What the science says
Recalling information beats re-reading it for building durable understanding.
How Fenzo does it
Lessons weave in quizzes and recall prompts, so it sticks.