Defensive / Blue TeamAdvancedFree

Digital Forensics & Incident Response

Carve deleted data, follow an attacker, and recover the truth from a machine.

Estimated time
2 hours
Rooms
4 rooms
Points
750 pts
Enrolled
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About this path

DFIR is the discipline of answering "what happened on this machine?" with evidence that holds up. This path deepens the defensive skillset: recovering data the owner believed was gone, reconstructing a full intrusion from logs and shell history, and reversing the tricks operators use to stage and hide their loot.

Who should start here

Defenders ready to go deeper than first-line triage — people who want to carve artefacts from raw media, work memory and process state, and produce a defensible reconstruction of an incident.

Prerequisites

The Blue Team path or equivalent experience: confident on a Linux shell, reading logs, and basic decoding. Familiarity with files on disk and process state helps.

What you will be able to do

  • Carve files and archives out of raw disk evidence
  • Recover artefacts still held open by a running process
  • Reconstruct an end-to-end intrusion from logs, history and persistence
  • Reverse layered obfuscation (base64 over XOR) to read staged data
  • Write up a clear, evidence-backed incident timeline

Curriculum

  1. Module 1 — Disk & file recovery0 of 1 rooms complete

    The bytes outlive the directory entry.

    1. 01Deleted Diaries — Not startedChallengeEasy20 min100 pts
  2. Module 2 — Live host & memory0 of 1 rooms complete

    What a process still holds when the file is gone.

    1. 02Memory of a Ghost — Not startedChallengeMedium30 min250 pts
  3. Module 3 — Full intrusion reconstruction0 of 2 rooms complete

    From first failed login to staged exfil.

    1. 03Silent Witness — Not startedLesson + challengeMedium35 min250 pts
    2. 04The Last Login — Not startedLesson + challengeMedium40 min150 pts
Digital Forensics & Incident Response — CyberA4U learning path | CyberA4U