The Unofficial BTL1 2026 Notes: The Blue Team Level 1 Survival Guide

The Unofficial BTL1 2026 Notes: The Blue Team Level 1 Survival Guide

If you are preparing for the Blue Team Level 1 (BTL1) certification, you already know that the 24-hour practical exam is a grueling test of endurance, skill, and methodology.

These BTL1 Notes are not just a summary; they are a comprehensive battle plan designed to cut through the noise and give you exactly what you need to pass. Unlike generic cybersecurity textbooks that drown you in theory, this guide is built for the trenches. It consolidates over 260 pages of critical incident response frameworks, command-line cheat sheets, and tool-specific workflows into a single, indispensable resource.

Whether you are staring down a complex Phishing investigation or frantically parsing Splunk logs for a hidden C2 beacon, these notes act as your external brain, ensuring you never freeze up when the exam clock is ticking.

Master Phishing Analysis & Email Forensics

Phishing analysis is often where Blue Teamers struggle because of the sheer volume of artifacts involved. These notes turn chaos into a checklist. You will find a step-by-step methodology for dissecting email headers to identify spoofing attempts using SPF, DKIM, and DMARC failures.

The guide doesn't just tell you what to look for; it gives you the specific tools and commands.

You’ll learn to use PhishTool and EmlAnalyzer to extract IOCs like malicious URLs and attachment hashes, and how to safely detonate payloads in a sandbox. Crucially, it breaks down the anatomy of a phishing attack from "typosquatting" domains to hidden "zero-font" attacks ensuring you can spot the subtle indicators that automated tools often miss.

Dominate Digital Forensics & Incident Response (DFIR)

The BTL1 exam requires you to be a jack-of-all-trades, and this guide makes you a master of them. It provides an exhaustive breakdown of the PICERL framework (Preparation, Identification, Containment, Eradication, Recovery, Lessons Learned), which is the absolute gold standard for structuring your exam report.

 You will find deep-dive technical references for memory forensics using Volatility 2 & 3, including exact syntax for listing hidden processes (psxview), dumping DLLs, and detecting code injection with malfind. For disk forensics, it covers Autopsy workflows and manual artifact recovery from the Recycle Bin and Windows Timeline, ensuring you can reconstruct an attacker's footprints even after they've tried to cover their tracks.

SIEM & Splunk: The Query-to-Win Cheat Sheet

Let's be honest: Splunk Search Processing Language (SPL) can be a nightmare under pressure. These notes include a dedicated "Splunk Survival" section that is practically a cheat sheet for the exam. It gives you ready-to-use queries for detecting Brute Force attacks, finding SQL Injection patterns in web logs, and correlating network traffic to identify data exfiltration.

You’ll learn how to filter out noise using dedup and stats, and how to hunt for specific HTTP methods or DNS anomalies that indicate Command & Control (C2) channels. This section alone is worth the price of admission, saving you hours of trial-and-error during your investigation.

Network Traffic Analysis (NTA) with Wireshark

Packet analysis is often the final frontier for many analysts, but this guide simplifies it into actionable steps. It provides a library of Wireshark display filters for spotting everything from TCP SYN scans (tcp.flags.syn==1) to SMB encryption keys.

You will learn how to extract files from PCAP data, decrypt SSL/TLS traffic using session keys, and identify "beaconing" behavior in regular traffic flows. The notes also cover Log Analysis for Linux (auth.log, syslog) and Windows (Event IDs like 4624 and 4688), ensuring you can correlate network packets with endpoint logs for a complete picture of the attack.

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