L3 Handoff

L2 to L3 handoff literacy — forensics package, scope, evidence index, open questions — on $HUNT_LAB escalation stub.

L3 Handoff• Audio Walkthrough

00:00/03:10

Visual · t30_l3_handoff

L3 handoff = named forensics transfer package. $HUNT_LAB. Original Cyberlium.

L3 needs a forensics-ready package — build the L2→L3 handoff from YOUR lab escalation stub, not a vague 'need deeper look.'

L3 handoff literacy: executive summary (three lines), severity and ticket link stub, PICERL stage and containment/eradication status, evidence index from Module 6-3, hunt findings and queries UTC, detection gaps from Module 9-2, recommended L3 scope (memory capture category, timeline expansion category — literacy not unauthorized imaging), open questions, analyst contact. Analyst builds handoff block from $HUNT_LAB escalate-yes scenario — without unauthorized prod L3 page, without attack repro in next steps, without omitting evidence chain. Cyberlium extends Topic 29 L2 handoff to L3 depth on practice rows. Refused: prod escalation without RoE, handoff with offensive cookbooks, empty forensics package. Lab row: L3 handoff template with ten required fields completed for one lab scenario.

1. L3 handoff fields

Summary, severity, PICERL status, evidence index, hunt findings, gaps, L3 scope, open questions, contact — nine literacy anchors.

Handoff extends Module 6 roles — L3/forensics pickup point.

Command guide

Try these commands — L3 handoff fields

═══ TOOLS & WEBSITES ═══ Browse / read these (authorized learning only — stay in YOUR lab / program scope)

L3 handoff — https://csrc.nist.gov/publications/detail/sp/800-61/rev-2/final FIRST — https://www.first.org/ MITRE — https://attack.mitre.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 HUNT_LAB=${HUNT_LAB:-$HOME/cyberlium-lab/t30-hunt}
python3 - <<'PY'
import os
lab = os.environ.get('HUNT_LAB', os.path.expanduser('~/cyberlium-lab/t30-hunt'))
path = os.path.join(lab, 'pir', 'l3-handoff-LAB-IR-001.md')
open(path, 'w').write('
'.join([
  '# L3 Handoff — LAB-IR-001',
  '## For L3 hunt lead',
  '  - Validated hypothesis: credential guess → execution → C2',
  '  - Open: any other hosts contacted 203.0.113.99?',
  '  - Open: svc_backup SMB lateral (LAB-IR-002) linked?',
  '## Artifacts',
  '  - hunt/hunt-hypothesis.md, correlation-notes.md',
  '  - ir/ir-timeline-LAB-IR-001.md, containment-log-LAB-IR-001.md',
  '  - pir/detection-gaps-LAB-IR-001.md',
  '## Detection tuning requests',
  '  - See hunt/tuning-notes-l2.txt + pir/detection-gaps',
  '## Refusals: no Impacket/Mimikatz/Cobalt; lab telemetry only',
]))
print(f'Wrote {path}')
PY

Command — copy this

grep -E 'L3|Artifacts|Refusals' "$HUNT_LAB/pir/l3-handoff-LAB-IR-001.md"

Primary tools to practice this lesson: grep, python3. Reference sites: L3 handoff (https://csrc.nist.gov/publications/detail/sp/800-61/rev-2/final); FIRST (https://www.first.org/); MITRE (https://attack.mitre.org/). Run every command in the box — install first, then the usage lines — only on YOUR lab / program scope.