Incident › Module 1 › Lesson 3
No Stranger IR
No stranger IR means refuse isolating third-party networks, running containment on systems you do not own, and unauthorized live-incident replication — write the refusal habit into YOUR $IR_LAB ethics card.
Visual · t34_no_stranger_ir
Stranger-network refusal. $IR_LAB only. Original Cyberlium.
Opening
Stranger ISP links, third-party cloud tenants, and unauthorized production isolation — all stop outside YOUR org scope. Literacy names the risk; drills stay on tabletop scenarios you own.
Unauthorized IR actions include isolating stranger networks without legal authorization, deploying ransomware or wipers for 'realism,' running destructive containment on third-party SaaS tenants, and scraping victim data without legal scope. Org scope follows ownership: employer networks require written incident authorization — stranger networks stay off limits. Cyberlium practices refusal sentences on YOUR $IR_LAB — 'I practice IR on fictional tabletop scenarios and name risks for defender context' — never copy workflows that aim containment at networks you do not operate. Next: Lab Setup.
1. Stranger IR patterns refused (named, literacy only)
Stranger-network isolation: cutting ISP or cloud links for networks you do not own — named for literacy, NOT executed on Cyberlium. Ransomware payload deployment: deploying encryptors for 'IR realism' — defender fix is tabletop narrative and recovery drills, not student replication.
On $IR_LAB, write three refusal triggers — e.g., stranger-network isolation request, ransomware payload deployment, unauthorized live-incident replication.
Command guide
Try these commands — Stranger IR patterns refused (named, literacy only)
═══ TOOLS & WEBSITES ═══ Browse / read these (authorized learning only — stay in YOUR lab / program scope)
NIST SP 800-61 — https://csrc.nist.gov/publications/detail/sp/800-61/rev-2/final CISA — https://www.cisa.gov/stopransomware (defensive ransomware guidance) FIRST — https://www.first.org/
═══ INSTALL ═══
Linux (Debian/Ubuntu):
Command — copy this
sudo apt install python3
macOS:
Command — copy this
brew install python3
Windows: Download https://python.org/downloads/
═══ LINUX / macOS ═══
Command — copy this
export IR_LAB=${IR_LAB:-$HOME/cyberlium-lab/t34-ir}
cat > "$IR_LAB/notes/no-stranger-ir.txt" <<'EOF'
SCOPE: YOUR lab folder $HOME/cyberlium-lab/t34-ir/ — tabletop scenarios + markdown playbooks only
NEVER: ransomware builders; paying criminals how-to; live isolation of stranger hosts
NEVER: execute containment on production/stranger networks without written authorization
ALLOWED: FAKE incident cards (LAB-IR-*); decision trees; comms/PIR templates; curl public IR docs
PURPOSE: defensive IR literacy — plan, tabletop, document — not offensive actions
EOFCommand — copy this
grep -E 'SCOPE|NEVER|ALLOWED' "$IR_LAB/notes/no-stranger-ir.txt"
python3 -c "print('Ethics: isolate stranger hosts = legal/ops risk — YOUR lab tabletop only')"Primary tools to practice this lesson: grep, python3. Reference sites: NIST SP 800-61 (https://csrc.nist.gov/publications/detail/sp/800-61/rev-2/final); CISA (https://www.cisa.gov/stopransomware); FIRST (https://www.first.org/). Run every command in the box — install first, then the usage lines — only on YOUR lab / program scope.
2. Why refusal protects you and others
Unauthorized containment violates laws, platform terms, and employer policy — skill without scope is career and legal risk. Victim harm: isolating stranger infrastructure or deploying payloads hurts real people and services you must not enable.
Defenders contain through authorized change control, IR plans, and org-owned assets — students practice naming these channels for hardening notes on lab scenarios only.
3. Ethics card habit
Forbidden: sharing stranger-network isolation tutorials in class chat, importing live victim IR timelines, deploying ransomware samples in lab. Allowed: ethics card — allowed lab scenario sources, NEVER list, refusal sentence you will say aloud.
Ship: IR ethics card with NEVER list and one refusal sentence. Next: Lab Setup.
4. What you ship: IR ethics card for $IR_LAB
Allowed lab scenario sources, NEVER list, refusal sentence. $IR_LAB named. NO stranger IR. chmod 600.
5. What you record before the next lesson
Date. Ethics card. $IR_LAB named. File t34-m01-l03-no-stranger-ir.txt chmod 600.
6. Wrong vs right: stranger networks vs YOUR IR tabletop
Worked failure — same MSF word, opposite target. Right never needs a café Wi-Fi or classmate laptop.
Wrong
Follow stranger-network isolation tutorial 'for containment practice.' Share live victim IR timeline in Discord.
Right
Write IR ethics card for YOUR $IR_LAB. Next: Lab Setup.
Mission: write YOUR stranger-IR refusal habit
1) List three NEVER targets (stranger-network isolation, ransomware payloads, unauthorized live-incident replication). 2) Write one refusal sentence for unauthorized IR requests. 3) Name allowed $IR_LAB scenario sources. 4) chmod 600.
Stuck? Ask Cyberlium AI Mentor
Name risks for defender context — never replicate offensive IR against networks you do not own.
Knowledge Check
APPLY: No stranger IR on Cyberlium means:
Multiple choice
Knowledge Check
APPLY: True or False: IR drills are taught with fictional tabletop scenarios only — not stranger-network isolation.
True or False
Knowledge Check
APPLY: Discord link to stranger-network isolation guide — you:
Multiple choice