Digital › Module 1 › Lesson 3
Legal Authority
Legal authority names permission to collect — consent, warrant, policy, or contract — before ANY imaging on $DFIR_LAB or live cases.
Visual · t26_legal_authority
Authority literacy. $DFIR_LAB only. Original Cyberlium.
Opening
Tools do not grant permission — authority does. Cyberlium refuses stranger-device work without it.
Legal authority is the documented right to access and image a device or account: owner consent, search warrant, court order, employment policy on company-owned assets, or explicit course/lab enrollment scope. Without authority, forensic skill becomes unauthorized access — criminal or civil risk depending on jurisdiction. Cyberlium maps authority types on YOUR $DFIR_LAB — you cite course letter, lab VM ownership, or practice dataset license — never 'found a phone, let's image it.' Next: CoC Lab.
1. Authority types (named)
Consent: written permission from owner or authorized agent. Warrant/order: judicial authorization with scope limits. Policy: employer-owned device under acceptable-use and IR policy. Lab scope: course enrollment, CTF range rules, or self-owned VM/image you created.
On $DFIR_LAB, write which authority applies to each practice artifact — 'self-created VM snapshot' and 'course dataset license' are common student answers.
Command guide
Try these commands — Authority types (named)
═══ 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: RFC 3227 (https://www.rfc-editor.org/rfc/rfc3227); CISA evidence handling (https://www.cisa.gov/topics/cybersecurity-best-practices/incident-response); SANS DFIR (https://www.sans.org/cyber-security-skills/digital-forensics/). Run every command in the box — install first, then the usage lines — only on YOUR lab / program scope.
2. Scope limits matter
Authority is rarely 'everything everywhere.' Warrants list locations and data classes; consent can be withdrawn; employment policy may exclude personal cloud accounts. Document scope in case notes before acquisition.
Defenders escalate to legal counsel when scope is unclear — students practice the pause habit on lab scenarios.
3. Refusal when authority is missing
Forbidden: imaging roommate laptop, ex-partner phone, employer device outside IR ticket, or 'public' USB sticks from parking lots without policy. Allowed: authority card naming type, scope, and source document for $DFIR_LAB.
Ship: authority card — type, scope sentence, source (consent form, course letter, self-owned). Next: CoC Lab.
4. What you ship: legal authority card for $DFIR_LAB
Authority type, scope, source document. $DFIR_LAB named. NEVER stranger devices without authority. chmod 600.
5. What you record before the next lesson
Date. Authority card. $DFIR_LAB named. File t26-m01-l03-legal-authority.txt chmod 600.
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
Image a found phone 'for practice.' Assume employer laptop is always fair game.
Right
Write authority card for YOUR $DFIR_LAB practice surface. Next: CoC Lab.
Mission: document YOUR authority source
1) Name authority type for your practice image. 2) Write one-sentence scope. 3) Cite source (course, self-owned, license). 4) chmod 600.
Stuck? Ask Cyberlium AI Mentor
When in doubt, stop and ask counsel — lab habit beats career-ending guesses.
Knowledge Check
APPLY: Legal authority on Cyberlium means:
Multiple choice
Knowledge Check
APPLY: True or False: Course enrollment can be valid lab authority for $DFIR_LAB datasets.
True or False
Knowledge Check
APPLY: Found a stranger phone — you:
Multiple choice