Linux Logging for SOC: How SOC Analysts Investigate Linux Systems | TryHackme | SOC Level 1 2025

This walkthrough of the TryHackMe – Linux Logging for SOC room teaches you how to investigate Linux systems using the most important log sources for SOC triage. According to the room description, you’ll explore authentication logs, runtime logs, system logs, package logs, bash history, and auditd, all of which are essential for detecting Linux‑based intrusions. You’ll begin by learning how Linux logs work, focusing on plain‑text log files stored in /var/log, including syslog, auth.log, and kernel logs. Linux logs are less structured than Windows logs, so you’ll practice filtering, searching, and parsing text‑based telemetry. Next, you’ll analyze authentication logs to detect SSH brute‑force attempts, failed logins, sudo usage, and user‑management events. You’ll then explore common Linux logs, including kernel logs, dpkg package‑installation logs, and bash history. After that, you’ll learn runtime monitoring, focusing on system calls like execve, which is used to execute programs. You’ll understand why system calls cannot be bypassed and how they form the foundation of Linux monitoring. Finally, you’ll dive into auditd, a powerful Linux auditing framework that monitors process execution, file access, and security‑relevant events. Auditd is essential for detecting suspicious activity on Linux servers and cloud workloads. 🔍 What you’ll learn: • How Linux logs work and where they are stored • How to detect SSH brute‑force attempts and failed logins • How to identify new user creation and privilege changes • How to analyze syslog, kernel logs, dpkg logs, and bash history • How system calls like execve reveal runtime activity • How auditd monitors process execution and file access • How SOC analysts correlate Linux logs to detect intrusions 🚀 Try it yourself: https://tryhackme.com/room/linuxloggi... FOR EDUCATIONAL PURPOSES ONLY 👍 Like, comment, and subscribe to ‪@wiredogsec‬ for more SOC, blue‑team, and Linux‑forensics walkthroughs.