An analyst would like to start automatically ingesting IoCs into the EDR tool. Which of the following sources would be the most cost effective for the analyst to use?

Government bulletins (e.g., CISA advisories, national CERTs) often provide IoCs free of charge in standardized, machine-readable formats (like STIX/TAXII feeds) that are designed for automated ingestion, making them highly cost-effective and reliable.

Social media can contain IoCs but often requires significant manual effort for curation, validation, and conversion into an ingestible format, making it less cost-effective for automated, reliable ingestion.

The dark web may contain valuable IoCs, but accessing and processing this information is legally and technically complex, carries significant risks, and is not cost-effective or practical for automated, regular ingestion.

Blogs can provide IoCs, but like social media, they are typically in unstructured formats, requiring manual effort for extraction and validation, which makes them less suitable for cost-effective automated ingestion.