Automated MITRE ATT&CK Technique Classification Using OSINT and Advanced NLP
Open-Source Intelligence (OSINT) can be considered a crucial part of the present-day Cyber Threat Intelligence (CTI) due to delivering prompt information about the adversary activity using publicly accessible reporting and analysis. Nonetheless, the conversion of unstructured OSINT stories into structured forms like the MITRE ATT&CK model is a highly manual and subjective task. The proposed paper offers an automated solution to the problem of categorizing the threat descriptions based on OSINT into the MITRE ATT&CK techniques with a sophisticated model based on transformer and natural language processing. The suggested framework has combined OSINT preprocessing, threat behavior extraction, semantic representation learning and multi-label ATT&CK techniques classification with confidence-aware outputs. Large-scale experiments on a wide OSINT corpus show that the proposed method is far more effective compared to the ones that rely on keyword parameters and conventional machine learning baselines, especially when there are missing and imprecise threat specifications. Findings indicate greater accuracy, retrieval, and strength of a vast variety of ATT&CK methods, including categories of low density. This work is a step in the right direction by facilitating scalable and standardized ATT&CK mapping of noisy OSINT data, thus leading to more effective CTI automation and decision support to the security operations of a practitioner.