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Security Information and Event Management (SIEM) tools are critical for monitoring, detecting, and responding to cybersecurity threats. Open-source SIEM solutions provide cost-effective alternatives to commercial products while maintaining robust security capabilities. Below are some of the best open-source SIEM tools available:
1. Wazuh
Wazuh combines XDR (Extended Detection and Response) and SIEM capabilities, offering log analysis, intrusion detection, and file integrity monitoring.
Key Features:
- Real-time log analysis
- Compliance monitoring (PCI DSS, GDPR, HIPAA)
- Cloud security monitoring (AWS, Azure, GCP)
Installation Command (Linux):
curl -sO https://packages.wazuh.com/key/GPG-KEY-WAZUH && sudo rpm --import GPG-KEY-WAZUH sudo yum install wazuh-manager
### **2. MozDef (Mozilla Defense Platform)**
MozDef is an underrated but powerful SIEM tool developed by Mozilla, designed for real-time security event processing.
**Key Features:**
- Automated alert triaging
- Integration with Elasticsearch for log storage
- Customizable dashboards
**Setup Steps:**
git clone https://github.com/mozilla/MozDef cd MozDef docker-compose up -d
### **3. Grafana Loki**
Grafana Loki is a log aggregation system optimized for storing and querying logs, often paired with Prometheus for metrics.
**Key Features:**
- Lightweight log storage
- Seamless Grafana integration
- Supports multi-tenancy
**Installation (Docker):**
docker run -d --name=loki -p 3100:3100 grafana/loki
### **4. OSSEC**
OSSEC is a host-based intrusion detection system (HIDS) that provides log analysis, rootkit detection, and active response.
**Key Features:**
- File integrity monitoring
- Automated threat response
- Multi-platform support (Linux, Windows, macOS)
**Installation:**
sudo apt-get update && sudo apt-get install ossec-hids-server
### **5. Apache Metron**
Apache Metron is a big-data security analytics framework that integrates with Hadoop for large-scale log processing.
**Key Features:**
- Real-time threat intelligence
- Behavior analytics
- Machine learning-based anomaly detection
**Deployment:**
git clone https://github.com/apache/metron cd metron mvn clean package -DskipTests
## **You Should Know:**
### **Essential SIEM Commands & Practices**
#### **Linux Log Analysis (Wazuh & OSSEC)**
<h1>Check Wazuh agent status</h1> sudo systemctl status wazuh-agent <h1>Search for failed SSH attempts</h1> grep "Failed password" /var/log/auth.log <h1>Analyze OSSEC alerts</h1> tail -f /var/ossec/logs/alerts/alerts.log
#### **Windows SIEM Logging (PowerShell)**
<h1>Enable PowerShell logging</h1> Set-ItemProperty -Path "HKLM:\Software\Policies\Microsoft\Windows\PowerShell\ScriptBlockLogging" -Name "EnableScriptBlockLogging" -Value 1 <h1>Export Event Logs</h1> Get-WinEvent -LogName Security | Export-CSV "C:\SecurityLogs.csv"
#### **Elasticsearch SIEM Integration**
<h1>Install Elasticsearch SIEM plugin</h1> sudo /usr/share/elasticsearch/bin/elasticsearch-plugin install ingest-attachment
## **What Undercode Say:**
Open-source SIEM tools like Wazuh, MozDef, and OSSEC provide enterprise-grade security without licensing costs. They integrate seamlessly with Elasticsearch, Grafana, and Prometheus, making them ideal for SOC teams.
**Key Takeaways:**
- Use Wazuh for XDR and compliance monitoring.
- MozDef excels in automated alert handling.
- Grafana Loki is best for lightweight log storage.
- OSSEC remains a top choice for HIDS.
**Expected Output:**
A fully configured SIEM system with real-time threat detection, automated alerts, and compliance reporting.
**Relevant URLs:**
References:
Reported By: Ethical Hacks – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
