This cheat sheet covers cybersecurity fundamentals—common threats, best practices, incident response steps, and key frameworks. Useful as a quick reference or training resource.
Common Threats and Vulnerabilities
- Malware: Malicious software like viruses, ransomware, spyware, Trojans.
- Phishing: Deceptive emails or messages tricking users into revealing sensitive information.
- Social Engineering: Exploiting human psychology to gain access or information.
- Zero-Day Attacks: Exploits for unknown vulnerabilities.
- Password Attacks: Guessing, brute forcing, or stealing passwords.
- Unpatched Software: Outdated software with known security holes.
- Weak Encryption: Data not encrypted strongly enough for protection.
- Denial-of-Service (DoS) Attacks: Overwhelming a system with traffic to make it unavailable.
Security Best Practices:
- Use Strong Passwords & Multi-Factor Authentication (MFA): Complex, unique passwords and additional verification methods.
- Keep Software Updated: Patch systems and applications promptly.
- Beware of Phishing: Don't click suspicious links or attachments; verify sender legitimacy.
- Be Cautious with Downloads: Only download from trusted sources.
- Enable Firewalls & Antivirus: Use security software to filter traffic and detect threats.
- Back Up Your Data: Regularly back up data to a secure location.
- Educate Users: Train employees on cybersecurity best practices and threat awareness.
- Secure Your Network: Implement strong network security measures.
- Segment Networks: Isolate critical systems from less sensitive ones.
Incident Response Steps:
- Identify & Contain: Identify the breach and contain it to prevent further damage.
- Investigate: Analyze the incident to understand the scope and root cause.
- Eradicate: Remove the threat and restore compromised systems.
- Recover: Restore data from backups and resume normal operations.
- Report & Learn: Report the incident and document lessons learned to prevent future attacks.
Key Security Frameworks and Standards:
- NIST Cybersecurity Framework (CSF): Provides a high-level approach to managing cybersecurity risk. (https://www.nist.gov/cyberframework)
- ISO/IEC 27001: International standard outlining information security management best practices. (https://www.iso.org/standard/27001)
- HIPAA: Protects patient health information in the US. (https://www.hhs.gov/hipaa/index.html)
- PCI DSS: Protects credit card data for merchants that accept payments. (https://www.pcisecuritystandards.org/)
Remember: Research each point for a deeper understanding.
