Digital › Module 8 › Lesson 1
Report Structure
DFIR report structure literacy — executive summary, scope, methodology, findings, limitations on $DFIR_LAB practice cases.
Visual · t26_report_structure
Report structure = legal-ready sections. $DFIR_LAB. Original Cyberlium.
Opening
A report judges your evidence discipline — structure it so counsel and blue team can act, not so Twitter can cheer.
Report structure literacy: cover/metadata, executive summary (non-technical), scope and legal authority reference, evidence inventory, methodology (tools, versions, hashes), timeline summary, findings (observed/inferred/hypothesis separated), limitations and gaps, conclusions, appendices/exhibits pointer. Cyberlium templates for $DFIR_LAB practice cases — NOT submitting lab fiction as real incident to employer, NOT omitting limitations to sound confident, NOT reports built from unauthorized acquisitions. Tone: professional, ticket-ready, no meme language. chmod 600 under $HOME/cyberlium-lab/reports. Feeds Module 8 report lab and Module 9 case workflow.
1. Core sections
Scope, authority, inventory, methodology, timeline, findings, limitations, conclusions — minimum eight.
Executive summary ≤ three sentences for mentor review literacy.
Command guide
Try these commands — Core sections
═══ LINUX / macOS (Malware Static & Dynamic Triage) ═══
Inspect PE / ELF binary headers and sections
Command — copy this
readelf -h sample.bin 2>/dev/null || xxd -g 1 -l 32 sample.bin
Check binary entropy (high entropy often signals packed or encrypted payloads)
Command — copy this
python3 -c "
import math, sys
data = open('sample.bin', 'rb').read() if len(sys.argv) > 1 else b'MZX\x00\x90'
ent = -sum((data.count(bytes([b]))/len(data))*math.log2(data.count(bytes([b]))/len(data)) for b in set(data))
print(f'Calculated File Entropy: {ent:.4f} (Entropy > 7.0 suggests packed/encrypted)')
" sample.bin 2>/dev/nullPrimary tools to practice this lesson: grep, python3. Reference sites: DFIR report writing (https://www.sans.org/cyber-security-skills/digital-forensics/); CISA IR reporting (https://www.cisa.gov/topics/cybersecurity-best-practices/incident-response); RFC 3227 (https://www.rfc-editor.org/rfc/rfc3227). Run every command in the box — install first, then the usage lines — only on YOUR lab / program scope.
2. Findings discipline
Each finding: ID, observed evidence, inference optional, recommendation, severity in lab context.
Hypotheses in separate subsection — not smuggled into observed bullets.
3. Scope refuse
No report claiming unauthorized access was performed; no forged evidence inventory.
Practice reports labeled practice when brief requires.
4. What you ship: report outline template
Eight sections defined + findings row fields + limitations paragraph stub + practice label line.
5. What you record before the next lesson
Report outline template path.
6. Wrong vs right: tampering evidence vs chain of custody
Worked failure — same MSF word, opposite target. Right never needs a café Wi-Fi or classmate laptop.
Wrong
Submit practice report to client as real breach assessment without label.
Right
Report outline template for $DFIR_LAB practice case. Next: Exhibits/Hashes.
Mission: report outline template
1) List eight report sections. 2) Define finding row fields. 3) Write limitations stub. 4) Label practice vs authorized case per brief.
Stuck? Ask Cyberlium AI Mentor
Ask Mentor: “Executive summary — what to omit?”
Knowledge Check
APPLY: DFIR report includes:
Multiple choice
Knowledge Check
APPLY: True or False: Omit limitations to sound confident.
True or False
Knowledge Check
APPLY: Findings separate:
Multiple choice