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https://www.microsoft.com/en-us/security/blog/topic/threat-intelligence
https://lab52.io/blog
https://www.rapid7.com/blog
https://www.sophos.com/en-us/blog
https://securelist.com/
https://www.group-ib.com/blog
https://www.esentire.com/resources/blog
https://blog.sekoia.io/
https://www.recordedfuture.com/research
https://www.crowdstrike.com/en-us/blog
https://blog.polyswarm.io/
https://www.enki.co.kr/en/media-center/blog
https://www.welivesecurity.com/en/eset-research/
https://pan1c.org/
https://www.trellix.com/blogs/research/
https://community.gurucul.com/articles/ThreatResearch
https://cyble.com/threat-actor-profiles/
https://cyble.com/blog/
https://www.greynoise.io/category/vulnerabilities
https://cert.gov.ua/articles
https://www.zscaler.com/blogs?topic=threat-research
https://www.elastic.co/security-labs/threat-command
https://www.clearskysec.com/blog/
https://redqueen.tj-un.com:57788/IntelHome.html
https://global.ptsecurity.com/en/research/pt-esc-threat-intelligence/