Malicious packages in public registries have significantly threatened the software supply chain (SSC) security in modern software engineering. Current software component analysis (SCA) tools have been applied to detect and report these threats to protect downstream users. However, existing SCA tools rely heavily on databases of known malicious components, while existing databases such as OSV and Snyk often have delays in data updates and incomplete information. This inadequacy is particularly evident in their limited coverage of non-structured intelligence sources like social media platforms and developer forums, where emerging threats are often first reported. Consequently, the lifecycle of malicious packages is extended, posing serious threats to downstream users. To address this, we developed a novel and comprehensive approach to construct a platform IntelliRadar to pinpoint the collection, processing, and extraction of malicious components intelligence. Specifically, by exhaustively searching and snowballing the public sources of malicious package intelligence, and incorporating large language models (LLMs) with domain-specialized Least to Most prompts, IntelliRadar ensures the coverage, timeliness, and accurate information extraction of malicious package intelligence. As a result, we constructed a comprehensive malicious package database containing 34,313 malicious NPM and PyPI packages. Our evaluation shows that IntelliRadar achieves high performance (97.91% precision) on malicious package intelligence extraction. Compared to existing databases, IntelliRadar identifies 7,542 more malicious packages than OSV and 12,684 more than Snyk. Furthermore, 76.6% of NPM components and 70.3% of PyPI components in IntelliRadar were collected earlier than in Snyk’s database. IntelliRadar is also more cost-efficient, with a cost of $0.003 per piece of malicious package intelligence and only $7 per month for continuous monitoring. Furthermore, we identified and received confirmation for 1,981 malicious packages in downstream package manager mirror registries through the implementation of IntelliRadar.