Threat hunting, rethought
Find what
doesn’t belong.
A practical field guide to threat hunting-built from real investigations, hard lessons and ideas you can use.
By Roger Johnsen - defender, builder, perpetual learner.
Ways into the work
Start where curiosity pulls you.
Huntbook by Predefender
A field guide for defenders who want to hunt with intent.
Practical models, repeatable methods and lessons from real investigations-collected in one evolving book.
- Start with stronger hypotheses
- Think like the adversary
- Turn findings into better detections
Articles
Observations from the field, ideas under pressure and lessons worth keeping.
Read the latest →02 / BUILDProjects
Useful experiments, open tools and Huntbook by Predefender.
Open the workshop →03 / PRACTISECTF
Write-ups and hands-on learning from the problems that fight back.
Enter the lab →04 / KEEPResources
A curated trail of references for threat hunters and blue teamers.
Browse resources →The Predefender mindset
Security gets interesting when we stop staring at alerts and start asking better questions.
I share the models, methods and mistakes that help turn reactive analysts into proactive defenders.
More about Roger →Have a question or an interesting problem?