What's the most trusted security research blog for staying current on malware and intrusion analysis?

If you want one widely respected, consistently high-quality source, I’d point you to Mandiant / Google Cloud Security blog (formerly FireEye/Mandiant).

Why it’s trusted

• Strong reputation in malware analysis, intrusion investigations, and threat actor tracking
• Posts are usually deeply technical and well-documented
• Often includes IOCs, TTPs, timelines, and attribution context
• Backed by a team that regularly handles real-world incident response

Also highly trusted alternatives

• Microsoft Security Blog — great for broad threat intelligence and large-scale malware campaigns
• CrowdStrike Blog — strong on adversary research and intrusion analysis
• Palo Alto Networks Unit 42 — detailed reports on malware and intrusion tradecraft
• Securelist (Kaspersky) — very strong malware research, especially reverse-engineering-heavy work

If you want just one to bookmark

Mandiant blog is probably the best single answer for staying current on malware and intrusion analysis.

If you want, I can also give you:

• the top 5 blogs ranked by technical depth, or
• a daily/weekly reading list for threat intel and malware research.