theProtector v2.3

A comprehensive host-based security monitoring framework that implements real-time threat detection through eBPF kernel monitoring, YARA pattern matching, network honeypots, and anti-evasion techniques.

Overview

theProtector provides multi-layer security monitoring for Linux systems by combining user-space and kernel-space detection mechanisms. The framework operates continuously to detect suspicious activities, malware, and evasion attempts while maintaining minimal system overhead.

Features

• eBPF Kernel Monitoring: Real-time process execution tracking and system call analysis
• YARA Malware Detection: Pattern-based scanning for webshells, reverse shells, and crypto miners
• Network Honeypots: Automated deployment of listeners on commonly targeted ports
• Anti-Evasion Detection: Cross-validation techniques to identify hidden processes and connections
• Threat Intelligence Integration: Automated updates with IP reputation checking
• REST API Interface: Web dashboard and programmatic access to monitoring data
• Forensic Capabilities: Detailed logging with integrity verification and quarantine functions
• Container Support: Optimized monitoring for containerized environments

Requirements

System Requirements

• Linux kernel 4.9+ (for eBPF functionality)
• Bash 4.0+

Optional Dependencies

# Ubuntu/Debian
sudo apt update
sudo apt install yara jq inotify-tools bcc-tools netcat-openbsd python3

# Fedora/RHEL
sudo dnf install yara jq inotify-tools bcc-tools nmap-ncat python3

# Arch Linux
sudo pacman -S yara jq inotify-tools bcc netcat python

Dependency Functions

• yara: Advanced malware detection rules
• jq: Enhanced JSON processing and output formatting
• inotify-tools: Real-time file system monitoring
• bcc-tools: eBPF kernel instrumentation
• netcat: Network honeypot implementation
• python3: API server and advanced monitoring features

Installation

Quick Start

# Download
git clone https://github.com/IHATEGIVINGAUSERNAME/theprotector.git
cd theProtector/
chmod +x theprotector.sh

# Test installation
sudo ./theprotector.sh test

# Run basic scan
sudo ./theprotector.sh

# Run enhanced monitoring
sudo ./theprotector.sh enhanced

Automated Installation

# Install scheduled monitoring (hourly cron job)
sudo ./theprotector.sh install

# Install systemd service (recommended for servers)
sudo ./theprotector.sh systemd

Nix Flake Installation

Note: the Nix flake bundles theprotector.sh as a wrapper script that includes all optional dependencies for theprotector.sh

Run the following command to install theprotector.sh with Nix:

nix profile install github:IHATEGIVINGAUSERNAME/theprotector

Usage

Basic Commands

Unprivileged usage -- running without sudo -- is also supported

# Run standard security scan
sudo ./theprotector.sh

# Run enhanced monitoring with all features
sudo ./theprotector.sh enhanced

# Test installation and show capabilities
sudo ./theprotector.sh test

# Check system status
sudo ./theprotector.sh status

Advanced Features

# Start web dashboard
sudo ./theprotector.sh dashboard
# Access at http://127.0.0.1:8080

# Run specific monitoring modules
sudo ./theprotector.sh yara        # YARA scanning only
sudo ./theprotector.sh honeypot    # Network honeypots only
sudo ./theprotector.sh ebpf        # eBPF monitoring only

# Performance mode (reduced overhead)
sudo ./theprotector.sh performance

Maintenance Commands

# View real-time logs
sudo ./theprotector.sh logs

# View today's alerts
sudo ./theprotector.sh alerts

# View JSON output
sudo ./theprotector.sh json

# Update threat intelligence
sudo ./theprotector.sh enhanced  # Automatic during scan

# Create new baseline
sudo ./theprotector.sh baseline

# Clean up processes and fix issues
sudo ./theprotector.sh cleanup

Configuration

Configuration File

Create sentinel.conf in the same directory as the script:

# Monitoring modules
MONITOR_NETWORK=true
MONITOR_PROCESSES=true
MONITOR_FILES=true
MONITOR_USERS=true
MONITOR_ROOTKITS=true
MONITOR_MEMORY=true

# Advanced features
ENABLE_ANTI_EVASION=true
ENABLE_EBPF=true
ENABLE_HONEYPOTS=true
ENABLE_API_SERVER=true
ENABLE_YARA=true
ENABLE_THREAT_INTEL=true

# Performance tuning
PERFORMANCE_MODE=false
MAX_FIND_DEPTH=2
SCAN_TIMEOUT=180
PARALLEL_JOBS=2

# Notifications
SEND_EMAIL=false
EMAIL_RECIPIENT=""
WEBHOOK_URL=""
SLACK_WEBHOOK_URL=""
SYSLOG_ENABLED=true

# Threat intelligence
ABUSEIPDB_API_KEY=""
VIRUSTOTAL_API_KEY=""
THREAT_INTEL_UPDATE_HOURS=6

# Network settings
API_PORT=8080
HONEYPOT_PORTS=("2222" "8080" "23" "21" "3389")

Environment Variables

# Override API port
export DASHBOARD_PORT=8081

# Custom log directory
export GHOST_SENTINEL_LOG_DIR="/custom/log/path"

Whitelisting

Edit the configuration to whitelist known-good processes and connections:

# Process whitelist (exact matching)
WHITELIST_PROCESSES=("firefox" "chrome" "docker" "systemd" "ssh")

# Network whitelist
WHITELIST_CONNECTIONS=("127.0.0.1" "8.8.8.8" "1.1.1.1")

# Path exclusions
EXCLUDE_PATHS=("/opt/tools" "/var/lib/docker" "/snap")

Output and Logging

Log Locations

# Root user
/var/log/ghost-sentinel/

# Non-root user
$HOME/.ghost-sentinel/logs/

Log Files

• sentinel.log - General activity log
• alerts/YYYYMMDD.log - Daily alert files
• latest_scan.json - Structured scan results
• honeypot.log - Network connection attempts
• ebpf_events.log - Kernel-level events
• quarantine/ - Quarantined files with forensic data

JSON Output Format

{
  "version": "2.3",
  "scan_start": "2025-01-15T10:30:00Z",
  "scan_end": "2025-01-15T10:32:15Z",
  "hostname": "server-01",
  "summary": {
    "total_alerts": 3,
    "critical": 0,
    "high": 1,
    "medium": 2,
    "low": 0
  },
  "alerts": [
    {
      "level": 2,
      "message": "Suspicious process detected",
      "timestamp": "2025-01-15T10:31:22Z"
    }
  ]
}

API Interface

Starting API Server

sudo ./theprotector.sh api
# Access dashboard at http://127.0.0.1:8080

API Endpoints

# System status
curl http://127.0.0.1:8080/api/status

# Recent alerts
curl http://127.0.0.1:8080/api/alerts

# Latest scan results
curl http://127.0.0.1:8080/api/scan

# Honeypot activity
curl http://127.0.0.1:8080/api/honeypot

Integration Examples

SIEM Integration

# Syslog output (automatic if SYSLOG_ENABLED=true)
logger -t "theprotector" -p security.alert "Alert message"

# JSON log parsing
tail -f /var/log/ghost-sentinel/latest_scan.json | jq '.alerts[]'

Webhook Notifications

# Configure webhook URL in sentinel.conf
WEBHOOK_URL="https://your-siem.com/webhook"
SLACK_WEBHOOK_URL="https://hooks.slack.com/services/..."

Cron Scheduling

# Manual cron entry (automatic with 'install' command)
0 * * * * /path/to/theprotector.sh enhanced >/dev/null 2>&1

Troubleshooting

Common Issues

Permission Denied

chmod +x ./theprotector.sh
sudo ././theprotector.sh test

eBPF Not Working

# Check kernel version
uname -r  # Should be 4.9+

# Install BCC tools
sudo apt install bcc-tools  # Ubuntu
sudo dnf install bcc-tools  # Fedora

Port Already in Use

# Check what's using the port
sudo ss -tulnp | grep :8080

# Use different port
export DASHBOARD_PORT=8081
sudo ./theprotector.sh api

High Resource Usage

# Enable performance mode
sudo ./theprotector.sh performance

# Or configure limits in sentinel.conf
PERFORMANCE_MODE=true
MAX_FIND_DEPTH=1
PARALLEL_JOBS=1

Debug Mode

# Enable verbose output
sudo ./theprotector.sh --verbose enhanced

Reset and Cleanup

# Fix common issues
sudo ./theprotector.sh cleanup

# Reset integrity checks after updates
sudo ./theprotector.sh reset-integrity

# Recreate baseline
sudo ./theprotector.sh baseline

Performance Considerations

Resource Usage

• CPU: 2-5% during normal operation, 8-12% during active scanning
• Memory: 15-40MB resident memory
• Disk: 1-3MB/hour log generation
• Network: 500KB every 6 hours for threat intelligence updates

Optimization Settings

# Production environments
PERFORMANCE_MODE=true
MAX_FIND_DEPTH=1
SCAN_TIMEOUT=60
PARALLEL_JOBS=1

# High-security environments
MAX_FIND_DEPTH=3
SCAN_TIMEOUT=300
ENABLE_ANTI_EVASION=true
ENABLE_EBPF=true

Security Considerations

Privilege Requirements

• Root access required for eBPF monitoring and honeypots
• Non-root operation available with limited functionality
• API server binds to localhost only by default

Log Security

• Alert logs include integrity checksums
• Quarantined files preserve forensic metadata
• Structured logging enables SIEM integration

Network Security

• Honeypots bind to localhost by default
• API authentication can be implemented for remote access
• Threat intelligence uses HTTPS with timeout controls

Contributing

Development Setup

git clone https://github.com/yourusername/theprotector.git
cd theprotector

# Run shellcheck for code quality
shellcheck theprotector.sh

# Test across environments
sudo ./theprotector.sh test

Adding Detection Rules

Edit YARA rules in the init_yara_rules() function or add new rule files to the YARA rules directory.

Extending Functionality

The modular design allows for easy extension:

• Add new monitoring modules in the main detection loop
• Implement additional API endpoints in the Python server
• Create new alert notification methods

License

This project is released under the MIT License. See LICENSE file for details.

Changelog

v2.3

• Added eBPF kernel monitoring
• Implemented network honeypots
• Enhanced anti-evasion detection
• Added REST API and web dashboard
• Improved threat intellig