Essential SOC Analyst Checklist: A Technical Guide for Blue Teamers

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Introduction

Security Operations Center (SOC) analysts play a critical role in defending organizations against cyber threats. This guide provides a structured checklist covering threat detection, incident response, and threat hunting workflows. Whether you’re a beginner or an experienced analyst, these actionable insights will enhance your SOC operations.

Learning Objectives

  • Understand key SOC workflows, from IOC analysis to post-incident reviews.
  • Learn essential commands and tools for threat detection and response.
  • Improve efficiency with playbooks, log mapping, and threat actor TTP alignment.

1. IOC & Threat Intelligence Repository

Objective: Correlate Indicators of Compromise (IOCs) with MITRE ATT&CK tactics.

Command:

 Query VirusTotal for an IOC (IP, hash, domain) 
curl --request GET --url "https://www.virustotal.com/api/v3/ip_addresses/{IP}" --header "x-apikey: YOUR_API_KEY"

Steps:

1. Replace `{IP}` with the suspicious IP.

  1. Use the API response to check reputation and linked malware.

3. Cross-reference with internal logs for detection.

2. Detection Engineering with KQL & Splunk

Objective: Write effective detection rules in KQL (Kusto Query Language).

Query:

SecurityEvent 
| where EventID == 4688 and CommandLine contains "powershell -nop -exec bypass" 
| project TimeGenerated, Computer, CommandLine

Steps:

  1. This detects suspicious PowerShell execution (common in attacks).
  2. Adjust filters (EventID, CommandLine) based on threat intel.

3. Export results for further analysis.

  1. Log Source Mapping for Sysmon & EDR
    Objective: Ensure critical logs (Sysmon, EDR) are ingested for detection.

Command:

 Check Sysmon service status (Windows) 
Get-Service -Name Sysmon

Steps:

1. Verify Sysmon is running (`Running` status).

  1. If missing, install Sysmon with a standard config: 
    sysmon.exe -i -accepteula -n
  2. Map logs to MITRE techniques (e.g., `T1059` for command-line execution).

4. Incident Response Playbook: Phishing Triage

Objective: Quickly assess and contain phishing incidents.

Command:

 Extract email headers for analysis 
grep -i "received:" phishing_email.eml

Steps:

1. Analyze headers for spoofing or malicious links.

2. Block sender IP/domain in the firewall:

iptables -A INPUT -s MALICIOUS_IP -j DROP

3. Notify users and scan endpoints for malware.

5. Threat Actor TTPs: Hunting for LOLBins

Objective: Detect living-off-the-land binaries (LOLBins) abuse.

Command:

 Find unusual PowerShell executions (Windows) 
Get-WinEvent -FilterHashtable @{LogName='Microsoft-Windows-PowerShell/Operational'; ID=4104} | Select-Object -First 10

Steps:

  1. Review script block logs (ID 4104) for obfuscated code.
  2. Compare with known LOLBins (e.g., `certutil.exe` downloading payloads).

3. Isolate affected hosts using EDR tools.

6. Threat Hunting with Sigma Rules

Objective: Proactively hunt for anomalies using Sigma.

Sigma Rule Example:

title: Suspicious Scheduled Task Creation 
description: Detects malicious scheduled task creation 
author: SOC Team 
logsource: 
product: windows 
service: system 
detection: 
selection: 
EventID: 106 
TaskName: 'Update' 
condition: selection

Steps:

1. Deploy rule in SIEM (Elastic, Splunk).

2. Monitor for unexpected task creations.

3. Investigate and escalate if malicious.

7. Post-Incident Review & Rule Tuning

Objective: Improve defenses after an incident.

Command:

 Check SIEM alert history (ELK example) 
curl -XGET 'http://localhost:9200/siem_alerts/_search?q=event.severity:high'

Steps:

1. Identify false positives and adjust thresholds.

2. Update detection rules based on attacker TTPs.

3. Document lessons learned for future incidents.

What Undercode Say

  • Key Takeaway 1: A structured SOC checklist ensures consistency in threat detection and response.
  • Key Takeaway 2: Automation (SOAR, EDR scripts) reduces manual workload and speeds up containment.

Analysis:

SOC analysts must balance proactive threat hunting with reactive incident response. By integrating MITRE ATT&CK, refining detection rules, and maintaining playbooks, teams can stay ahead of adversaries. The future of SOC operations lies in AI-driven anomaly detection, but foundational skills (log analysis, IOCs, TTP mapping) remain critical.

Prediction:

As attack surfaces expand (cloud, IoT), SOC teams will increasingly rely on AI-assisted triage. However, human expertise in interpreting alerts and refining automation will remain indispensable.

Further Learning:

By following this checklist, SOC analysts can enhance their workflows, reduce mean time to detect (MTTD), and improve overall security posture. 🚀

IT/Security Reporter URL:

Reported By: Ouardi Mohamed – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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