Incident Response Skill

Purpose

Establish comprehensive procedures for detecting, analyzing, containing, eradicating, and recovering from security incidents across all Hack23 projects, aligned with NIST SP 800-61r2 and ISO 27035.

Rules

Incident Classification

MUST classify incidents by severity:

Severity	Description	Response Time	Escalation
Critical	Active exploitation, data breach, system compromise	1 hour	CEO immediate
High	Vulnerability with exploit available, unauthorized access attempt	4 hours	CEO within 24h
Medium	Suspicious activity, policy violation, failed attacks	24 hours	Weekly review
Low	Minor policy deviations, informational alerts	72 hours	Monthly review

Response Phases

Phase 1: Detection & Analysis

• MUST monitor security alerts from GitHub Advanced Security (CodeQL, Dependabot, Secret Scanning)
• MUST classify incident severity within 30 minutes of detection
• MUST preserve evidence before taking containment actions
• MUST NOT modify or delete log data during investigation

Phase 2: Containment

• MUST isolate affected systems/accounts immediately for Critical incidents
• MUST revoke compromised credentials within 1 hour
• MUST document all containment actions with timestamps
• MUST NOT allow affected systems to remain accessible during active exploitation

Phase 3: Eradication & Recovery

• MUST identify root cause before recovery
• MUST verify all malicious artifacts are removed
• MUST rotate all potentially compromised secrets
• MUST validate system integrity before restoring service

Phase 4: Post-Incident

• MUST conduct lessons-learned review within 5 business days
• MUST update incident response procedures based on findings
• MUST document incident in security log with full timeline

Secret Compromise Response

When a secret is detected in source code:

1. Immediately rotate the compromised credential
2. Review git history for exposure duration
3. Check access logs for unauthorized use
4. Update .gitignore and pre-commit hooks
5. Document in incident log

Hack23 ISMS Policy References

• Incident Response Plan
• Information Security Policy
• Business Continuity Plan

Compliance Mapping

• ISO 27001:2022: A.5.24-A.5.28 (Incident Management)
• NIST CSF 2.0: RS (Respond), RC (Recover)
• CIS Controls v8.1: Control 17 (Incident Response Management)