Triaging Security Incident With Ir Playbook

Triaging Security Incident With Ir Playbook

Overview

Cybersecurity skill for triaging security incident with ir playbook. Follows industry best practices and security standards.

When to Use

Trigger phrases:

• "triaging security incident with ir playbook"

• "Classify and prioritize security incidents using structured IR playbooks to dete"

• New security alert received from SIEM, EDR, or other detection sources

• SOC analyst needs to determine if an alert is a true positive requiring response

• Incident needs severity classification and team assignment

• Multiple concurrent incidents require prioritization

• Automated triage rules need validation or tuning

When NOT to Use

• When you lack proper authorization for testing
• For production systems without change management
• When the task requires legal or compliance expertise beyond technical scope

Prerequisites

• SIEM platform with alert correlation (Splunk, Elastic, QRadar, Sentinel)
• Incident response playbook library (by incident type)
• Severity classification matrix approved by CISO
• On-call rotation and escalation procedures
• Ticketing system for incident tracking (ServiceNow, Jira, TheHive)
• Threat intelligence feeds for IOC enrichment

Workflow

# Example: IOC detection
import re

IOC_PATTERNS = {
    "ip": r"\b(?:\d{1,3}\.){3}\d{1,3}\b",
    "domain": r"\b[a-z0-9-]+\.[a-z]{2,}\b",
    "hash_md5": r"\b[a-f0-9]{32}\b",
    "hash_sha256": r"\b[a-f0-9]{64}\b",
}

def extract_iocs(text: str) -> dict:
    return {k: re.findall(v, text) for k, v in IOC_PATTERNS.items()}

1. Define Objectives — Clarify the goals and scope for security incident.
2. Gather Resources — Collect tools, data, and access needed for security incident.
3. Execute Process — Carry out security incident operations methodically.
4. Verify Quality — Check results against acceptance criteria.
5. Document Outcomes — Record findings, decisions, and next steps.

Tools

• ir playbook — Primary tool for this skill
• Analysis Platform — Data processing and visualization
• Collaboration Tools — Team coordination and knowledge sharing

Process

1. Reconnaissance — Gather target information, identify attack surface, enumerate services
2. Analysis/Exploitation — Execute the technique, analyze results, document findings
3. Reporting — Document IOCs, write findings, provide remediation recommendations

Verification

• All security incident procedures executed completely and documented
• Findings validated against multiple data sources
• False positives identified and filtered
• Results documented with evidence and timestamps
• Recommendations provided with risk-based prioritization

Anti-Rationalization Table