SOC › Module 6 › Lesson 1
PICERL Named
PICERL lifecycle literacy — Preparation, Identification, Containment, Eradication, Recovery, Lessons Learned — mapped to YOUR $HUNT_LAB incident stubs, not unauthorized prod IR.
Visual · t30_picerl_named
PICERL = named IR lifecycle stages. $HUNT_LAB literacy. Original Cyberlium.
Opening
Incidents move through named phases — learn PICERL on YOUR hunt-lab stubs before you touch production response without authorization.
PICERL lifecycle literacy names defender IR phases: Preparation (playbooks, contacts, tooling readiness), Identification (confirm incident scope from telemetry), Containment (limit blast radius — decision literacy on YOUR lab host notes), Eradication (remove threat access — defender vocabulary only), Recovery (restore services with validation), Lessons Learned (PIR and detection gaps). L2/L3 analyst maps $HUNT_LAB synthetic incident timeline to PICERL rows — cites hunt findings from prior modules — without executing lateral movement, malware deployment, or unauthorized prod containment. Cyberlium on $HUNT_LAB: instructor incident stub, your labeled hunt pack under $HOME/cyberlium-lab/t30-hunt/. Refused: prod IR without RoE, attack repro to 'practice phases,' skipping documentation between stages. Lab row: six PICERL stages with one defender checkpoint each. chmod 600 under $HOME/cyberlium-lab.
1. Named PICERL stages
Preparation → Identification → Containment → Eradication → Recovery → Lessons Learned — six literacy anchors.
Each stage has entry/exit criteria at category level — not ad-hoc heroics.
Command guide
Try these commands — Named PICERL stages
═══ LINUX / BASH (SOC Analyst Triage) ═══
Filter system logs for security-relevant warnings and errors
Command — copy this
journalctl -p 3 -xb --no-pager | head -20
Search for suspicious persistent cron entries or service changes
Command — copy this
ls -lat /etc/cron.* /etc/systemd/system/ | head -15
═══ WINDOWS POWERSHELL ═══ Triage recent system service installations (Event 7045)
Command — copy this
Get-WinEvent -FilterHashtable @{LogName='System';Id=7045} -MaxEvents 5 -ErrorAction SilentlyContinue | Format-Table TimeCreated, Message -WrapCheck open listening network connections with process owners
Command — copy this
Get-NetTCPConnection -State Listen | Select-Object LocalAddress, LocalPort, OwningProcess | Sort-Object LocalPort
Primary tools to practice this lesson: grep, curl. Reference sites: NIST SP 800-61 PICERL (https://csrc.nist.gov/publications/detail/sp/800-61/rev-2/final); SANS IR (https://www.sans.org/white-papers/incident-handlers-handbook/); FIRST (https://www.first.org/). Run every command in the box — install first, then the usage lines — only on YOUR lab / program scope.
2. Mapping hunt findings
Hunt hypothesis hits feed Identification; disposition triggers Containment decision literacy.
Separate observed telemetry from inferred impact — same discipline as Topic 29 triage.
3. $HUNT_LAB boundary
PICERL notes from YOUR sample telemetry and incident stubs only — not unauthorized prod IR.
Refused: lateral movement cookbooks, malware authoring, prod containment without ticket.
4. What you ship: PICERL literacy card
Six PICERL stages + one defender checkpoint each + NEVER unauthorized prod IR line.
5. What you record before the next lesson
PICERL literacy card path.
6. Wrong vs right: stranger prod vs YOUR hunt telemetry
Worked failure — same MSF word, opposite target. Right never needs a café Wi-Fi or classmate laptop.
Wrong
Run lateral movement in employer network to 'practice Identification phase.'
Right
PICERL literacy card from $HUNT_LAB incident stub. Next: Roles in IR.
Mission: PICERL literacy card
1) Name six PICERL stages. 2) One defender checkpoint per stage. 3) Map one hunt finding to Identification row. 4) Write NEVER unauthorized prod IR line.
Stuck? Ask Cyberlium AI Mentor
Ask Mentor: “Containment vs Eradication — literacy boundary?”
Knowledge Check
APPLY: PICERL literacy on Cyberlium uses:
Multiple choice
Knowledge Check
APPLY: True or False: Lateral movement against prod is lab.
True or False
Knowledge Check
APPLY: Identification phase confirms:
Multiple choice