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

There isn’t a single universally “most trusted” blog, but a few are widely respected for high-quality malware and intrusion analysis:

• Microsoft Security Blog / Microsoft Threat Intelligence — strong for intrusion analysis, actor tracking, and real-world campaigns.
• Mandiant (Google Cloud) Blog — excellent incident-driven reporting and detailed intrusion writeups.
• Talos Intelligence (Cisco) — solid malware research, threat intel, and vulnerability analysis.
• Unit 42 (Palo Alto Networks) — very good malware, ransomware, and campaign analysis.
• CrowdStrike Blog — good for adversary profiling and intrusion tactics.
• Securelist (Kaspersky) — long-running, technical malware research.
• The DFIR Report — especially strong for hands-on intrusion chains and initial access to persistence.
• Elastic Security Labs — good technical writeups on malware and detection engineering.

If you want one best “stay current” combo, I’d suggest:

1. The DFIR Report for intrusion analysis
2. Mandiant or Microsoft Threat Intelligence for broader threat actor coverage
3. Securelist or Unit 42 for deep malware research

If you want, I can also give you a ranked list by technical depth, or a feed to follow daily/weekly.