HOW TO SETUP CSIRT AND SOC

Executive Summary: Building Next-Generation Security Operations

As enterprise attack surfaces expand across multi-cloud environments, remote endpoints, and SaaS applications, security breaches are no longer a question of "if," but "when." Preventing catastrophic ransomware and data exfiltration requires a centralized, 24/7 Security Operations Center (SOC) combined with a highly specialized Computer Security Incident Response Team (CSIRT).

HOW TO SETUP CSIRT AND SOC is the definitive 105-page operational reference manual for CISOs, Security Managers, SOC Leads, and Incident Responders. Spanning 8 comprehensive modules, this book provides an exact blueprint for establishing enterprise SOC/CSIRT capability: from organizational chartering and FIRST compliance to SIEM correlation engineering, SOAR playbook automation, threat intelligence integration (STIX/TAXII), and digital forensics incident response (DFIR).

Deep Dive: Core SOC & CSIRT Operational Subsystems

The handbook provides production SIEM correlation rules, Python SOAR automation scripts, and incident response playbooks across five key domains:

1. SIEM Log Aggregation & Correlation Engineering

Ingesting telemetry at scale across enterprise infrastructure:

• Elastic Security & Splunk Detection Rules: Writing SIGMA and KQL detection rules for detecting command execution (`vssadmin delete shadows`), credential dumping (`lsass.exe` memory access), and suspicious PowerShell invocations.

2. SOAR Playbook Automation & Enrichment

Eliminating analyst alert fatigue through automated response orchestration:

• Automated Containment: Querying VirusTotal/AbuseIPDB APIs, isolating compromised EDR hosts, and pushing firewall block rules via automated SOAR workflows.

3. CSIRT Governance & NIST SP 800-61 Framework

Standardizing enterprise incident containment:

• Incident Response Stages: 1) Preparation; 2) Detection & Analysis; 3) Containment, Eradication & Recovery; 4) Post-Incident Activity.

Field Engineering: SIEM Correlation Rule & Python SOAR Containment

Chapter 3 of the handbook provides practical Elastic KQL rules for detecting ransomware shadow copy deletion:

# Elastic SIEM KQL Rule: Detect Volume Shadow Copy Deletion (T1490)
event.category: "process" and event.type: "start" and
process.name: ("vssadmin.exe", "wmic.exe", "powershell.exe") and
process.args: (
  "*delete*shadows*",
  "*shadowcopy*delete*",
  "*Resize-Partition*",
  "*wbadmin*delete*catalog*"
)

import requests
import json

# Python SOAR Playbook: Automated Threat Containment
def isolate_compromised_host_and_block_ip(agent_id, malicious_ip):
    headers = {"Authorization": "Bearer YOUR_EDR_API_TOKEN", "Content-Type": "application/json"}
    
    # 1. Trigger EDR Host Isolation (CrowdStrike / Wazuh)
    print(f"[*] Triggering EDR Isolation for Endpoint Agent: {agent_id}...")
    isolation_url = f"https://api.edr-platform.com/v1/agents/{agent_id}/isolate"
    resp = requests.post(isolation_url, headers=headers)
    if resp.status_code == 200:
        print(f"[+] Endpoint {agent_id} ISOLATED successfully!")
        
    # 2. Push Block Rule to Palo Alto / Fortinet Firewall
    print(f"[*] Pushing IP Block Rule for: {malicious_ip}...")
    firewall_url = "https://api.firewall-gateway.com/v1/blocklist"
    requests.post(firewall_url, json={"ip": malicious_ip, "reason": "Automated SOAR Triage"}, headers=headers)
    print(f"[+] Malicious IP {malicious_ip} BLOCKED on Perimeter Firewall!")

isolate_compromised_host_and_block_ip("AGENT-9942-WIN11", "185.220.101.5")

Complete Table of Contents & Module Syllabus

• Module 01 CSIRT & SOC Foundations: Charters, FIRST & Mandates

  Pages 1–12
  Establishing organizational authority, FIRST guidelines, defining legal mandates, and building SOC team structures.
• Module 02 SOC Architecture: Log Ingestion, SIEM & EDR Engineering

  Pages 13–26
  Designing log pipelines (Syslog, Windows Event Logs, AWS CloudTrail), SIEM sizing, and EDR agent deployment.
• Module 03 Detection Engineering: SIGMA, KQL Rules & MITRE ATT&CK

  Pages 27–40
  Mapping alerts to MITRE ATT&CK matrix, writing SIGMA & KQL correlation rules, and reducing false positive alert fatigue.
• Module 04 SOAR Playbook Automation & Threat Intelligence Integration

  Pages 41–55
  Building Shuffle/Cortex XSOAR playbooks, integrating STIX/TAXII feeds, MISP threat intelligence, and API enrichment.
• Module 05 Incident Response Playbooks (NIST SP 800-61 Lifecycle)

  Pages 56–70
  Standard operating procedures (SOPs) for Ransomware, BEC Phishing, Cloud Account Compromise, and Insider Threats.
• Module 06 Digital Forensics & Incident Response (DFIR) Essentials

  Pages 71–85
  Memory forensics (Volatility 3), disk triage (FTK Imager), timeline analysis (Plaso/log2timeline), and chain of custody.
• Module 07 SOC Operations: Staffing, Shift Handover & SLA Metrics

  Pages 86–98
  Tier 1/2/3 shift rotation models, follow-the-sun SOC operations, tracking MTTD & MTTR, and analyst burnout mitigation.
• Module 08 Continuous Improvement: Threat Hunting, Tabletop Exercises & Audit

  Pages 99–105
  Proactive hypothesis-driven threat hunting, conducting executive tabletop simulation exercises, and SOC maturity assessments.

Who Should Read This Handbook?

This handbook is designed for security leadership and SOC operations teams:

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