The ISC provides a free analysis and warning service to thousands of Internet users and organizations.
HackerOne is a vulnerability coordination and bug bounty platform that connects businesses with penetration testers and cybersecurity researchers.
HolisticInfoSec.io is dedicated to sharing information security content and resources in an open, clear manner, with the hope of helping improve infosec for all who seek to do so.
Volexity is a security firm that assists organizations with incident response, digital forensics, trusted advisory, and threat intelligence.
Cybersecurity directives from the US Gov to patch systems etc
Aggregator for news about cybercrime, breaches, APTs and more.
The Microsoft Security Response (MSRC) team identifies, monitors, responds to and resolves security incidents and vulnerabilities in Microsoft software. Go MSRC!
Cisco Talos Intelligence Group is one of the largest commercial threat intelligence teams in the world.
CrowdStrike provide cloud workload and endpoint security, threat intelligence, and cyberattack response services.
FireEye provide hardware, software, and services to investigate cybersecurity attacks, protect against malicious software, and analyze IT security risks.
General security analysis and research from Microsoft.
Network-orientated analysis and research from Cloudflare
UK-orientated general analysis and research from the National Cyber Security Centre.
Email/spam threat research from Proofpoint.