You're reading from Effective Threat Investigation for SOC Analysts

Product type Book

Published in Aug 2023

Publisher Packt

ISBN-13 9781837634781

Pages 314 pages

Edition 1st Edition

Languages

Concepts

Cybersecurity

Author (1):

Mostafa Yahia

Table of Contents (22) Chapters

Preface

1. Part 1: Email Investigation Techniques

2. Chapter 1: Investigating Email Threats

3. Chapter 2: Email Flow and Header Analysis

4. Part 2: Investigating Windows Threats by Using Event Logs

5. Chapter 3: Introduction to Windows Event Logs

6. Chapter 4: Tracking Accounts Login and Management

7. Chapter 5: Investigating Suspicious Process Execution Using Windows Event Logs

8. Chapter 6: Investigating PowerShell Event Logs

9. Chapter 7: Investigating Persistence and Lateral Movement Using Windows Event Logs

10. Part 3: Investigating Network Threats by Using Firewall and Proxy Logs

11. Chapter 8: Network Firewall Logs Analysis

12. Chapter 9: Investigating Cyber Threats by Using the Firewall Logs

13. Chapter 10: Web Proxy Logs Analysis

14. Chapter 11: Investigating Suspicious Outbound Communications (C&C Communications) by Using Proxy Logs

15. Part 4: Investigating Other Threats and Leveraging External Sources to Investigate Cyber Threats

16. Chapter 12: Investigating External Threats

17. Chapter 13: Investigating Network Flows and Security Solutions Alerts

18. Chapter 14: Threat Intelligence in a SOC Analyst’s Day

19. Chapter 15: Malware Sandboxing – Building a Malware Sandbox

20. Index

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Firewall logs anatomy

A firewall generates very useful logs, including valuable information. By understanding these firewall logs and their valuable information, you can investigate several attack tactics, such as lateral movement, reconnaissance, command and control, and exfiltration.

Let’s discuss and explain all the possible fields that exist in the logs that are generated by a network firewall, regardless of the vendor or product name, and how to benefit from them during incident investigations.

The firewall log fields are called Log Timestamp, Source IP, Source Port, Destination IP, Destination Port, Source Interface Zone, Destination Interface Zone, Device Action, Sent Bytes, Received Bytes, Sent Packets, Received Packets, Source Geolocation country, and Destination Geolocation country. We’ll look at these in detail in the following subsections.