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Introduction:
A Security Operations Center (SOC) Analyst is the first line of defense against cyber threats, requiring mastery of networking, operating systems, SIEM platforms, and incident response frameworks. The structured roadmap shared by industry expert Priom Biswas outlines a comprehensive path from core IT skills to advanced deception and purple teaming, bridging the gap between monitoring and proactive threat hunting.
Learning Objectives:
- Implement SIEM log analysis and correlation using Splunk, ELK, or QRadar to detect real-time anomalies.
- Perform threat hunting and IOC extraction with OSINT tools like Maltego, Shodan, and Zeek for network security monitoring.
- Execute purple team simulations mapping to MITRE ATT&CK, leveraging EDR and honeypots for validated defense improvements.
You Should Know:
- SIEM Log Analysis & Correlation with Splunk and ELK
SOC analysts spend 60% of their time analyzing logs from firewalls, endpoints, and servers. SIEM platforms normalize disparate data sources, enabling real-time alerting and forensic searches.
Step‑by‑step guide for Splunk (Linux):
1. Install Splunk Free:
wget -O splunk.tgz 'https://www.splunk.com/en_us/download/splunk-enterprise.html?academic=false' tar -xzvf splunk.tgz cd splunk/bin ./splunk start --accept-license
2. Ingest Windows Event Logs via Universal Forwarder:
- Download `SplunkForwarder.msi` on Windows.
- Configure `inputs.conf` to monitor Security logs:
[WinEventLog://Security] index = main disabled = false
- Search for brute-force attempts (Linux CLI alternative using `grep` on raw logs):
grep "Failed password" /var/log/auth.log | awk '{print $11}' | sort | uniq -c | sort -nr
4. Create correlation alert in Splunk:
index=main sourcetype=WinEventLog:Security EventCode=4625 | stats count by src_ip | where count > 10
For ELK (Elasticsearch, Logstash, Kibana):
- Use Filebeat to ship
/var/log/syslog:curl -L -O https://artifacts.elastic.co/downloads/beats/filebeat/filebeat-8.x-amd64.deb sudo dpkg -i filebeat-8.x-amd64.deb sudo filebeat modules enable system sudo filebeat setup --dashboards
2. Network Traffic Analysis with Zeek & Wireshark
NSM (Network Security Monitoring) uncovers malicious traffic that signatures miss. Zeek generates rich logs; Wireshark provides deep packet inspection.
Step‑by‑step Zeek setup on Ubuntu:
1. Install Zeek:
sudo apt install zeek -y export PATH=$PATH:/opt/zeek/bin
2. Monitor interface `eth0`:
sudo zeek -i eth0 -C
3. Extract DNS tunneling attempts from `dns.log`:
cat dns.log | zeek-cut query | awk -F'.' '{print length($1)}' | awk '$1 > 50'
4. Windows PowerShell equivalent – capture live traffic with netsh:
netsh trace start capture=yes provider=Microsoft-Windows-NDIS-PacketCapture maxsize=100 filemode=circular netsh trace stop Convert .etl to .pcap using etl2pcapng (external tool)
Wireshark CLI (tshark) for TLS certificate anomalies:
tshark -r capture.pcap -Y "tls.handshake.certificate" -T fields -e tls.handshake.extensions_server_name -e x509sat.uTF8String
- Linux & Windows Security Commands for Incident Response
Rapid triage requires native OS commands to extract IOCs, processes, and persistence.
Linux IR commands:
List listening ports with process names sudo ss -tulpn Check for modified system binaries in last 24 hours find /bin /usr/bin -type f -mtime -1 -ls Extract scheduled cron jobs for persistence crontab -l; sudo cat /etc/crontab; ls -la /etc/cron. Hunt for reverse shells via netstat netstat -antp | grep ESTABLISHED | grep -E ':(443|80|53)'
Windows PowerShell IR commands (run as Admin):
Get recent security events (failed logins)
Get-WinEvent -FilterHashtable @{LogName='Security'; ID=4625} -MaxEvents 50 | Format-List TimeCreated, Message
List all running processes with network connections
Get-NetTCPConnection | Group-Object -Property OwningProcess | ForEach-Object {Get-Process -Id $_.Name} | Select ProcessName, Id
Check for persistent WMI event subscriptions
Get-WMIObject -Namespace root\subscription -Class __EventFilter
Extract autoruns (requires Sysinternals)
.\Autorunsc64.exe -accepteula -a -c > autoruns.csv
4. Vulnerability Scanning & Configuration Hardening with Nessus/Qualys
Continuous vulnerability monitoring ensures patching aligns with risk appetite. Nessus detects missing patches and misconfigurations against CIS benchmarks.
Step‑by‑step Nessus Essentials (free) on Linux:
1. Register and download from tenable.com, then install:
sudo dpkg -i Nessus-<version>.deb sudo /bin/systemctl start nessusd
2. Access https://localhost:8834, complete setup.
3. Create a basic network scan for subnet `192.168.1.0/24` using “Basic Network Scan” template.
4. Export results in CSV and prioritize by CVSS score > 7.0:
Example: parse CSV with awk to filter critical
awk -F',' '$5 >= 7.0 {print $1","$2","$5}' nessus_export.csv
Linux hardening command (CIS benchmark check):
Ensure auditd is installed and rules active
sudo auditctl -l
Check for world-writable files
sudo find / -xdev -type f -perm -0002 -exec ls -la {} \;
Windows hardening via PowerShell (disable SMBv1):
Set-SmbServerConfiguration -EnableSMB1Protocol $false -Force Get-WindowsFeature FS-SMB1 | Uninstall-WindowsFeature -Restart
- Threat Hunting with OSINT: Shodan, Maltego, and Censys
Proactive hunting uses public data to discover exposed assets, leaked credentials, or adversary infrastructure.
Shodan CLI hunting for vulnerable services:
Install shodan CLI pip install shodan shodan init YOUR_API_KEY Search for unauthenticated Redis servers shodan search 'redis port:6379 !unauthorized' --fields ip_str,port Hunt for default Elasticsearch clusters shodan search 'port:9200 elasticsearch' --fields ip_str,http.title
Maltego transforms for domain intelligence:
- Install Maltego CE, load “DNS Name → IP Address” transform.
- Run “To IP Address” on target domain, then “To ASN” to map infrastructure.
- Use “To Files (VirusTotal)” for hash lookups.
Linux CLI IOC extraction from web logs:
Extract unique IPs scanning for /wp-admin
grep "wp-admin" /var/log/apache2/access.log | awk '{print $1}' | sort -u
Cross-reference with threat intelligence feeds
curl -s "https://urlhaus.abuse.ch/downloads/csv/" | grep -f iplist.txt
- Purple Teaming: MITRE ATT&CK Simulation with Atomic Red Team
Purple teaming combines red (attack) and blue (defense) to validate detections. Atomic Red Team provides test cases mapped to ATT&CK.
Step‑by‑step atomic test on Linux:
1. Install Atomic Red Team:
git clone https://github.com/redcanaryco/atomic-red-team.git cd atomic-red-team/atomics pip install -r requirements.txt
2. Execute a T1059.004 (Unix Shell) test:
./execution/linux/T1059.004/T1059.004.yaml
3. Monitor detection in SIEM: ensure alert for `bash` parent process spawning `nc` or curl.
4. Windows example (PowerShell as Admin):
Simulate T1003.001 – LSASS memory dumping Invoke-AtomicTest T1003.001 -TestNumbers 1
5. Validate EDR (CrowdStrike/SentinelOne) logs for `lsass.exe` process access.
Deception with Honeypot (T1560.002):
Deploy T-Pot honeypot on Ubuntu:
git clone https://github.com/telekom-security/tpotce cd tpotce ./install.sh --type=auto
Review logs in `/opt/tpot/logs` for SSH bruteforce attempts.
7. Zero Trust Infrastructure Monitoring & API Security
Monitor segmentation via firewall logs, enforce TLS/SSL inspection, and audit API tokens.
Linux iptables logging for east-west traffic:
sudo iptables -A FORWARD -j LOG --log-prefix "FW-DENY: " --log-level 4 sudo tail -f /var/log/kern.log | grep "FW-DENY"
Windows Firewall logging (enable via PowerShell):
Set-NetFirewallProfile -Profile Domain,Public,Private -LogFileName C:\fw.log -LogAllowed $true -LogBlocked $true
API security check for JWT misconfigurations (using `jq`):
Decode JWT without signature validation echo "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwicm9sZSI6InVzZXIiLCJpYXQiOjE1MTYyMzkwMjJ9" | cut -d"." -f2 | base64 -d 2>/dev/null | jq . Look for 'role: admin' or long expiration 'exp'
What Undercode Say:
- Key Takeaway 1: A SOC analyst’s effectiveness hinges on hands-on proficiency with both open-source (ELK, Zeek, Atomic Red Team) and commercial tools (Splunk, CrowdStrike), not just theoretical frameworks.
- Key Takeaway 2: Purple teaming and deception technologies are no longer optional – they transform reactive SOCs into proactive threat hunting units that measure detection coverage via MITRE ATT&CK mapping.
Analysis: The roadmap reflects the industry shift from siloed alert triage to integrated cyber defense. Modern SOC analysts must write regex for log parsing, script automation in Python/Bash, and interpret compliance frameworks (GDPR, PCI-DSS) while maintaining operational tempo. The inclusion of “Zero Trust” and “Infrastructure Monitoring” signals that perimeter-less security demands continuous verification of every packet and API call. However, many junior analysts overlook the “Awareness Support” branch – phishing simulation metrics and user feedback loops are critical for reducing human risk, which accounts for 74% of breaches. As AI-driven SOAR platforms automate low-level alerts, the analyst’s role will evolve toward threat hunting, deception deployment, and purple team orchestration. Commands provided above for SIEM querying, network forensics, and atomic testing are directly transferable to CompTIA CySA+, BTL1, or SC-200 certification labs.
Prediction:
By 2028, SOCs will rely on generative AI to auto-generate correlation rules from historical incident data, reducing false positives by 60%. However, adversaries will simultaneously adopt AI to craft polymorphic malware and evade signature-based detection. This will force SOC analysts to specialize in adversarial machine learning (AML) and federated threat intelligence sharing across organizations. Entry-level roles will require at least Purple Team certification (e.g., MITRE ATT&CK Defender) and hands-on experience with cloud-native SIEMs (e.g., Microsoft Sentinel, Google Chronicle). The SOC Analyst roadmap of today will expand to include “AI Security Monitoring” and “LLM Log Sanitization” as mandatory core skills.
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IT/Security Reporter URL:
Reported By: Priombiswas Infosec – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
