SOC (Security Operation Centre) – A Comprehensive Guide For SOC Analysts

A SOC Analyst’s role revolves around rapid detection, response, and continuous learning. Below is an in-depth breakdown of essential phases, tools, and responsibilities for effective SOC operations.

Incident Response Phases

1. Preparation – Define policies, procedures, and playbooks.

Identification – Detect threats using SIEM, IDS/IPS, and log analysis.
Containment – Isolate affected systems to prevent spread.

4. Eradication – Remove malware, close vulnerabilities.

5. Recovery – Restore systems securely.

6. Lessons Learned – Document improvements.

You Should Know: Essential SOC Tools & Commands

1. Packet Analysis & Capture

Wireshark (GUI-based packet analysis):
```
wireshark
```
Tcpdump (CLI packet capture):
```
tcpdump -i eth0 -w capture.pcap
```
Filtering HTTP Traffic:
```
tcpdump -i eth0 port 80 -A
```

2. Network Scanning & Enumeration

Nmap (Port & service discovery):
```
nmap -sV -p- -T4 <target_IP>
```

Netcat (Network debugging & backdoor checks):

nc -zv <IP> <port>  Port check
nc -nvlp 4444  Listen for connections

3. Log Analysis & SIEM Queries

Splunk (Log correlation):

source="/var/log/auth.log" | stats count by user

Grep for Failed SSH Attempts:

grep "Failed password" /var/log/auth.log

Journalctl for System Logs:

journalctl -u sshd --no-pager | grep "Failed"

4. Threat Hunting & Forensics

YARA for Malware Detection:

yara -r malware_rules.yar /suspicious_directory

Volatility (Memory Forensics):
```
volatility -f memory.dump pslist
```
Chkrootkit for Rootkit Detection:
```
sudo chkrootkit
```

5. Phishing & Malware Analysis

VirusTotal API (CLI):

curl -s -X POST --url 'https://www.virustotal.com/vtapi/v2/url/scan' --data "apikey=API_KEY&url=http://malicious.site"

URLScan.io Submission:

curl -X POST "https://urlscan.io/api/v1/scan/" -H "Content-Type: application/json" -d '{"url":"https://example.com", "public":"on"}'

Key SOC Responsibilities

Log Monitoring: Analyze auth logs (/var/log/auth.log), syslog, and Windows Event Logs (Get-WinEvent).
Threat Intelligence: Follow CVE databases (cve.mitre.org), OSINT tools like theHarvester.
SIEM Optimization: Fine-tune Splunk, ELK, or QRadar rules.
Continuous Learning: Engage in CTFs (TryHackMe, HackTheBox).

What Undercode Say

A SOC Analyst must master CLI tools (tcpdump, grep, netcat) and automate repetitive tasks with scripting (Bash, Python). Proactive threat hunting (YARA, Volatility) and log analysis (Splunk, ELK) are critical. Always verify alerts before escalation and document IR steps meticulously.

Expected Output: A well-structured SOC workflow with actionable commands and best practices.

Relevant URLs:

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References:

Reported By: Dharamveer Prasad – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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