Evidence for Blue
Package red-team telemetry and timelines for defenders — redacted $LAB_RT evidence blue can ingest, not stranger breach dumps.
Visual · t21_evidence_for_blue
Evidence for blue = UTC timeline + logs + map. Redacted $LAB_RT. Original Cyberlium.
Blue cannot tune what they never saw — hand off timelines and log excerpts from the exercise they authorized.
Evidence for blue bundles UTC timeline, hostnames from RoE, technique IDs, redacted log excerpts, detections map, and explicit 'data touched' statement (synthetic only). Format for SOC: one-page executive pulse plus technical appendix with correlation IDs — not raw malware zips from strangers, not live user creds, not anti-forensics instructions. Cyberlium teaches handoff hygiene on $LAB_RT purple exercises — chmod 600 until blue ticket opened; redact internal IPs if policy requires; align with incident response playbooks as training, not fake crisis on unauthorized assets.
1. Blue handoff pack
Timeline UTC, TTP list, detection map, sample alerts (redacted), gaps prioritized, teardown confirmation.
Executive pulse: objective met Y/N, top two gaps, next purple cycle date.
Command guide
Try these commands — Blue handoff pack
═══ TOOLS & WEBSITES ═══ Browse / read these (authorized learning only — stay in YOUR lab / program scope)
Blue evidence — https://sigmahq.io/ (what to capture for detection engineers) Atomic Red Team — https://redcanary.com/atomic-red-team/ (validate detections on YOUR lab)
═══ INSTALL ═══
Linux (Debian/Ubuntu): Built-in (iproute2)
macOS: Use: netstat
Windows: Use: netstat
═══ LINUX / macOS ═══
Command — copy this
ss -tulpn 2>/dev/null | tee "$HOME/cyberlium-lab/t21-rt/blue-evidence-ss.txt" | head -12 journalctl --no-pager -n 40 2>/dev/null | grep -iE 'sshd|sudo|cron|network' | head -10 || journalctl --no-pager -n 15 2>/dev/null | tail -8
Primary tools to practice this lesson: journalctl, ss. Reference sites: Blue evidence (https://sigmahq.io/); Atomic Red Team (https://redcanary.com/atomic-red-team/). Run every command in the box — install first, then the usage lines — only on YOUR lab / program scope.
2. Redaction rules
Remove lab creds, synthetic tokens OK to redact entirely; never include real PII or stranger dump paste.
Mark ENGAGEMENT_ID on every page — scope clarity prevents prod confusion.
3. Integration
Map evidence to blue ticket fields — severity of gap, suggested rule owner, retest window.
No surprise drops of exploit code on blue Slack without RoE context.
4. What you ship: blue handoff template
Timeline template + log excerpt rules + exec pulse skeleton + redaction checklist.
5. What you record before the next lesson
Evidence for blue template path.
6. Wrong vs right: stranger phishing vs authorized RT lab
Worked failure — same MSF word, opposite target. Right never needs a café Wi-Fi or classmate laptop.
- Wrong: Drop live NTDS dump on blue channel to 'help them detect.'
- Right: Blue handoff template ready. Next: Purple Lab.
Mission: blue handoff template
1) Draft UTC timeline skeleton. 2) List required log excerpt types. 3) Write exec pulse format. 4) Redaction checklist + chmod 600.
Stuck? Ask Cyberlium AI Mentor
Ask Mentor: “SIEM import vs PDF handoff?”
APPLY: Evidence for blue includes:
APPLY: True or False: Live cred dumps help blue tuning.
APPLY: Handoff redaction: