Purple › Module 9 › Lesson 2
Blue Backlog
Blue backlog literacy — finding to ticket, owner stub, detection engineering task, validation criteria — backlog rows on YOUR `$PURPLE_LAB`.
Visual · t35_blue_backlog
Blue backlog = named ticket rows. $PURPLE_LAB. Original Cyberlium.
Opening
Findings die in chat without backlog — name ticket and owner rows on YOUR lab before unauthorized prod SIEM pushes.
Blue backlog literacy names: finding-to-ticket mapping category, owner/team stub category, detection engineering task category (new rule, tune, telemetry uplift literacy), acceptance criteria category, and target sprint stub category. Analyst documents blue backlog stub on `$PURPLE_LAB` finding register from 9-1 — three backlog items with task type and validation criteria — without creating unauthorized prod tickets, without vague 'fix SIEM' tasks, without skipping acceptance criteria. Cyberlium teaches handoff vocabulary — purple to blue coordination on YOUR notes. Refused: unauthorized prod ticket creation, vague tasks, skip validation criteria. Lab row: blue backlog stub (three items, owner, task, acceptance criteria).
1. Named backlog rows
Finding-to-ticket, owner, DE task, acceptance criteria, sprint stub — five literacy anchors.
Each item links finding ID from 9-1 — not orphan tasks.
Command guide
Try these commands — Named backlog rows
═══ TOOLS & WEBSITES ═══ Browse / read these (authorized learning only — stay in YOUR lab / program scope)
Elastic backlog — https://www.elastic.co/guide/en/security/current/rules-ui.html Splunk ES — https://docs.splunk.com/Documentation/ES MITRE ATT&CK — 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 PURPLE_LAB=${PURPLE_LAB:-$HOME/cyberlium-lab/t35-purple}
cat > "$PURPLE_LAB/findings/blue-backlog.csv" <<'EOF'
finding_id,priority,technique,rule_action,owner,status,due_date
PURPLE-FND-001,P2,T1110.001,tune threshold on failed-logon-lab.yml,det_eng,open,2026-09-05
PURPLE-FND-002,P1,T1082,write Sigma stub or enable audit,det_eng,open,2026-09-12
PURPLE-FND-003,P3,T1059.001,seed process jsonl + rule stub,det_eng,backlog,2026-10-01
EOFCommand — copy this
grep -E 'PURPLE-FND|det_eng|T1110' "$PURPLE_LAB/findings/blue-backlog.csv"
python3 -c "print('Blue backlog: purple findings → prioritized detection engineering work')"Primary tools to practice this lesson: grep, python3. Reference sites: Elastic backlog (https://www.elastic.co/guide/en/security/current/rules-ui.html); Splunk ES (https://docs.splunk.com/Documentation/ES); MITRE ATT&CK (https://attack.mitre.org/). Run every command in the box — install first, then the usage lines — only on YOUR lab / program scope.
2. Acceptance discipline
Criteria cite atomic retest or log replay validation — lab or ticket path literacy.
Task type specific: new rule, tune existing, telemetry source — not generic fix.
3. Refused
No unauthorized prod tickets; no vague backlog items; no skip acceptance criteria.
Backlog literacy supports delivery — not finding graveyard.
4. What you ship: blue backlog stub
Three items + owner + task + acceptance criteria + NEVER unauthorized prod ticket line.
5. What you record before the next lesson
Blue backlog stub path.
6. Wrong vs right: stranger networks vs YOUR purple lab
Worked failure — same MSF word, opposite target. Right never needs a café Wi-Fi or classmate laptop.
Wrong
Create employer prod Jira tickets from unauthorized lab finding notes without org approval.
Right
Blue backlog stub from `$PURPLE_LAB` finding register. Next: Retrospectives.
Mission: blue backlog stub
1) Name five backlog literacy rows. 2) Three items from finding register. 3) Task type and acceptance criteria each. 4) Write NEVER unauthorized prod ticket line.
Stuck? Ask Cyberlium AI Mentor
Ask Mentor: “Acceptance criteria — atomic vs replay literacy?”
Knowledge Check
APPLY: Blue backlog literacy uses:
Multiple choice
Knowledge Check
APPLY: True or False: Backlog items may skip acceptance criteria.
True or False
Knowledge Check
APPLY: Backlog stub includes:
Multiple choice