1. First website. common vulnerability scoring system. https://www.first.org/cvss/
2. Github website. atomic red team tests. https://github.com/redcanaryco/atomic-red-team
3. Github website. MITRE CALDERA. https://github.com/mitre/caldera
4. Github website. MITRE CASCADE. https://github.com/mitre/cascade-server
5. MITRE website. MITRE ATT&CK enterprise matrix. https://attack.mitre.org/matrices/enterprise/