🎯 Goal
Master the art of collecting, preserving, and analyzing digital evidence while managing live security incidents. Learn to determine the scope of a breach, contain it, eradicate the threat, and recover – all while maintaining forensic integrity.
🔑 Key Skills to Learn
- Incident Response Lifecycle: Preparation, Detection & Analysis, Containment/Eradication, Recovery, Post-Incident Activity (NIST 800-61).
- Evidence Acquisition & Chain of Custody: Order of volatility, forensic imaging (dead/live), write-blockers, documentation.
- Disk & File System Forensics: MBR/GPT, NTFS/FAT/ext4 internals, file carving, timeline analysis (MACB times).
- Memory Forensics: Acquire RAM dumps, analyze process listings, network connections, injected code, registry hives in memory.
- Windows Forensics: Registry analysis (MRU, USB devices, ShimCache, AmCache), Event Log deep-dive, Prefetch, LNK files, $MFT analysis.
- Linux/Mac Forensics: Log analysis (auth.log, syslog), shell history, persistence mechanisms (cron, systemd timers), plist analysis (Mac).
- Network Forensics: PCAP analysis for incident scoping, extracting files and C2 patterns, flow analysis.
- Malware Analysis (Triage): Static analysis (strings, PE headers, hashes), dynamic analysis in a sandboxed environment (basic behavior observation).
- Threat Hunting: Hypothesis-driven investigation, leveraging EDR telemetry and logs to find undetected compromises.
- Reporting: Executive summary, technical findings, timelines, IoCs, remediation steps.
🛠️ Essential Tools & Technologies
| Tool | Purpose |
|---|---|
| Autopsy / The Sleuth Kit | Disk image analysis, file recovery, timeline creation (GUI/CLI). |
| Volatility 3 | Advanced memory forensics framework for Windows/Linux/Mac dumps. |
| KAPE | Fast triage collection and processing of forensic artifacts from live Windows systems. |
| FTK Imager | Free tool for creating forensic images and mounting them for analysis (Windows). |
| Velociraptor | Open-source endpoint monitoring, digital forensics, and incident response (like EDR with forensic depth). |
| Wireshark / Tshark | Network traffic and PCAP analysis. |
| RegRipper | Automated parsing of Windows Registry hives for key forensic artifacts. |
| CyberChef | Data manipulation, decoding, and analysis (often used to deobfuscate payloads). |
| SIFT Workstation (VM) | Ubuntu-based DFIR toolkit by SANS with all major open-source tools pre-installed. |
| REMnux (VM) | Linux distribution for malware analysis (reverse engineering and behavioral). |
📖 Free Learning Resources
- TryHackMe – SOC Level 1 & Cyber Defense Paths – Rooms: "DFIR: An Introduction", "Volatility", "Autopsy". Link
- Blue Team Labs Online (BTLO) – Free DFIR challenges covering disk, memory, and network investigations. Link
- CyberDefenders – Free, high-quality blue team CTF challenges (PCAPs, memory dumps, disk images). Link
- SANS DFIR Posters – Essential cheat sheets for Windows forensic artifacts, memory forensics, event logs. Link
- DFIR Training – Aggregator of free resources, tools, certifications, and blogs. Link
- The DFIR Report – Real-world intrusion analysis by SentinelOne, showing exactly how attacks unfold. Link
- AboutDFIR – Links to free ebooks, cheat sheets, and videos. Link
- "Windows Forensics" by 13Cubed (YouTube) – Excellent walkthrough of key artifacts and tools. Link
- PicoCTF – Contains digital forensics challenges in past competitions (beginner-friendly). Link
🔗 Roadmap Placement
- Prerequisites: Blue Team/SOC Fundamentals (logs, alerts, basic triage), solid Linux and Windows command line, networking (packet analysis).
- Directly Enables: Digital Forensics Analyst, Incident Responder, Threat Hunter, Malware Analyst, or Purple Team roles.
- Next Steps: After mastering DFIR, you can specialize in Malware Analysis & Reverse Engineering, Threat Hunting, or Cloud DFIR.