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  Schema Chaos and the Art of STIX Maintenance

  developers tutorial July 10, 2023

  All I wanted was EPSS and CVSS to show up in OpenCTI. Instead, I ended up reverse-engineering half its schema and building new STIX Extensions from scratch. Here’s the mildly painful but oddly satisfying journey.
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  Your First STIX Objects: A Developer’s Guide to STIX 2.1 with Python

  developers tutorial June 19, 2023

  The fast, code-first way to generate valid STIX 2.1 threat intelligence in Python. Covers SDOs, SCOs, relationships, versioning, and bundling — everything you need to start building and sharing structured intel like a pro.
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  Understanding STIX 2.1 Objects: A Foundation for Structured Threat Intelligence

  analysts developers tutorial May 14, 2023

  Forget the 50-page spec. This guide explains STIX 2.1 objects—SDOs, SCOs, SROs, SMOs, and Bundles—in plain English with real threat intel examples.