Listen to this Post
Introduction:
Security Information and Event Management (SIEM) remains the backbone of modern Security Operations Centers (SOCs), enabling real-time log aggregation, correlation, and threat detection across cloud, endpoint, and network environments. With cyber threats evolving rapidly, mastering SIEM platforms like Splunk, IBM QRadar, Microsoft Sentinel, and Elastic is essential for any security analyst – and this article provides a curated, hands-on roadmap using only free training resources and open-source tools.
Learning Objectives:
- Understand core SIEM concepts: log management, correlation rules, and incident prioritization.
- Deploy and configure free tiers of leading SIEM platforms (Splunk Free, Elastic Stack, QRadar CE).
- Implement Windows and Sysmon logging, write correlation queries, and integrate threat intelligence feeds.
You Should Know:
- Building a Free SIEM Lab with Elastic Stack (ELK)
Elastic Stack (Elasticsearch, Logstash, Kibana) offers a powerful, open-source SIEM alternative. Follow this step-by-step guide to set up your own lab on Ubuntu 22.04.
Step 1: Install Elasticsearch
wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add - sudo apt-get install apt-transport-https echo "deb https://artifacts.elastic.co/packages/8.x/apt stable main" | sudo tee /etc/apt/sources.list.d/elastic-8.x.list sudo apt-get update && sudo apt-get install elasticsearch sudo systemctl start elasticsearch sudo systemctl enable elasticsearch
Step 2: Install Kibana
sudo apt-get install kibana sudo systemctl start kibana sudo systemctl enable kibana
Access Kibana at `http://your-server-ip:5601`. Use the enrollment token generated during Elasticsearch installation.
Step 3: Install Filebeat to Ship Windows Logs
On a Windows machine, download Filebeat from Elastic. Edit `filebeat.yml` to set Elasticsearch output and enable the `winlogbeat` module. Run:
.\filebeat.exe modules enable winlogbeat .\filebeat.exe setup .\filebeat.exe -e
Now you can visualize Windows Event logs in Kibana’s SIEM app. Free training: Elastic Fundamentals and Manual.
- Mastering Windows Logging & Sysmon for SIEM Ingestion
Effective SIEM analysis starts with rich Windows logs. Enable advanced auditing and deploy Sysmon to capture process creation, network connections, and file changes.
Step 1: Enable Command Line Logging in Event 4688
Via Group Policy: Computer Configuration → Administrative Templates → Windows Components → Windows Logon Options → “Include command line in process creation events” → Enabled.
Step 2: Install Sysmon with SwiftOnSecurity Configuration
Download Sysmon and config Invoke-WebRequest -Uri https://live.sysinternals.com/Sysmon64.exe -OutFile C:\Tools\Sysmon64.exe Invoke-WebRequest -Uri https://raw.githubusercontent.com/SwiftOnSecurity/sysmon-config/master/sysmonconfig-export.xml -OutFile C:\Tools\sysmon.xml Install C:\Tools\Sysmon64.exe -accepteula -i C:\Tools\sysmon.xml
Step 3: Query Windows Event Logs with PowerShell
Get recent 4624 (successful logons)
Get-WinEvent -FilterHashtable @{LogName='Security'; ID=4624; StartTime=(Get-Date).AddHours(-24)} | Select-Object TimeCreated, Message
Export to CSV for SIEM ingestion
Get-WinEvent -FilterHashtable @{LogName='Microsoft-Windows-Sysmon/Operational'; ID=1} | Export-Csv -Path C:\Logs\sysmon_process.csv
Reference: Windows Logging Basics and PowerSIEM – Analyzing Sysmon Events with PowerShell.
3. Deploying Splunk Free for Hands-On Correlation
Splunk Free indexes up to 500 MB/day – perfect for learning. Install on Linux and ingest sample logs.
Step 1: Install Splunk Free on Ubuntu
wget -O splunk.tgz 'https://www.splunk.com/en_us/download/splunk-enterprise.html?academic=false&architecture=x86_64&platform=linux&version=9.2.0&product=splunk' tar -xzvf splunk.tgz sudo ./splunk/bin/splunk start --accept-license
Access web UI at port 8000. Default credentials: admin/changeme.
Step 2: Ingest Windows Event Logs via Universal Forwarder
On Windows, install Splunk Universal Forwarder. Configure `inputs.conf`:
[WinEventLog://Security] index = main disabled = false [WinEventLog://Application] index = main
Then forward to Splunk indexer. Use the search head to run:
index=main EventCode=4624 | stats count by Account_Name, Source_Network_Address
Step 3: Create a Correlation Alert
Search for 5 failed logons followed by a success within 60 seconds:
index=main (EventCode=4625 OR EventCode=4624) | transaction Account_Name maxspan=1m | where mvcount(EventCode) > 1 AND EventCode=4624
Save as an alert. Free courses: Basic Searching, Practical Splunk: Zero to Hero.
4. Microsoft Sentinel: Cloud-Native SIEM with KQL
Microsoft Sentinel is a scalable, cloud-native SIEM. Set up a free trial Azure account and deploy a Log Analytics workspace.
Step 1: Create Log Analytics Workspace
Install Az module Install-Module -Name Az -AllowClobber Connect-AzAccount Create workspace New-AzOperationalInsightsWorkspace -ResourceGroupName "SIEM-RG" -Name "SentinelWorkspace" -Location "EastUS"
Step 2: Enable Sentinel and Connect Data Connectors
In Azure Portal, navigate to Microsoft Sentinel → Add workspace. Then under “Data connectors”, install:
– Azure Active Directory (sign-in logs)
– Security Events (via Azure Monitor Agent)
– Microsoft 365 Defender
Step 3: Write KQL Queries for Hunting
// Failed logons over 10 attempts per user SigninLogs | where ResultType == 50057 | summarize Count = count() by UserPrincipalName, IPAddress | where Count > 10 // Lateral movement detection (event 4624 from remote IP) SecurityEvent | where EventID == 4624 and LogonType == 3 | summarize RemoteLogons = count() by Account, IpAddress
Training: Microsoft Sentinel Level 400 and SOC 101.
- IBM QRadar Community Edition: AQL and Offense Management
QRadar CE is free for up to 50 EPS. Install on VMware or bare metal (minimum 8GB RAM, 4 cores).
Step 1: Install QRadar CE
Download from IBM and deploy OVA. Access console via HTTPS. Follow initial setup wizard (admin/password).
Step 2: Add a Log Source – Windows Event Collector
Navigate to Admin → Log Sources → Add. Select “Microsoft Windows Event Log”. Provide WEC server IP and credentials. QRadar will start pulling events.
Step 3: Write an Ariel Query Language (AQL) Statement
SELECT username, sourceip, COUNT() as attempts FROM events WHERE eventname = 'User Logon Failed' AND username IS NOT NULL LAST 24 HOURS GROUP BY username, sourceip HAVING attempts > 5
Save as a custom rule to generate an offense. Free resources: QRadar 101, Ariel Query Language Guide, and Jose Bravo’s 38-video series.
- Cloud Hardening & API Security for SIEM Ingestion
Modern SIEMs ingest cloud logs (AWS CloudTrail, Azure Monitor, GCP). Secure your API integrations and avoid common misconfigurations.
Step 1: Forward AWS CloudTrail to Splunk
Using Splunk Add-on for AWS. Configure IAM role with least privilege:
{
"Version": "2012-10-17",
"Statement": [{
"Effect": "Allow",
"Action": ["logs:DescribeLogGroups", "logs:GetLogEvents"],
"Resource": ""
}]
}
Step 2: Harden Cloud SIEM Access
- Enforce MFA for all SIEM console users.
- Use Azure Private Link or AWS VPC Endpoints to keep SIEM traffic internal.
- Rotate API keys every 90 days; store in Azure Key Vault or AWS Secrets Manager.
Step 3: Detect API Abuse with SIEM
// Azure: Multiple failed API calls then success AppServiceHTTPLogs | where ScStatus == 401 or ScStatus == 200 | summarize Failures = countif(ScStatus == 401), Success = countif(ScStatus == 200) by CIp | where Failures > 10 and Success > 0
Explore free resources: Chronicle Security (Google Cloud) and Exabeam Fusion SIEM.
What Undercode Say:
- Free training portals from Splunk, Elastic, and Microsoft provide production-grade labs without financial barriers – leverage them to build a SOC analyst portfolio.
- Combining Windows Sysmon with open-source correlation engines (ELK + PowerSIEM) rivals expensive commercial solutions for small environments.
- API security and cloud logging are non-negotiable; misconfigured cloud SIEM ingestion is a top attack vector for data exfiltration.
Prediction:
By 2027, AI-driven SIEMs will automate 70% of alert triage using large language models and user behavior analytics, reducing false positives but requiring analysts to master natural language querying (e.g., “show me all suspicious PowerShell executions last hour”). Open-source SIEM adoption will surge among SMEs, while cloud-native platforms like Microsoft Sentinel will dominate enterprise SOCs. Hands-on training from this 2026 edition will become mandatory for certifications like CISSP and Security+.
▶️ Related Video (82% Match):
🎯Let’s Practice For Free:
IT/Security Reporter URL:
Reported By: Ouardi Mohamed – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
