NetExec MCP Server

A Model Context Protocol (MCP) server that provides AI assistants with access to NetExec (nxc), the powerful network execution and penetration testing tool formerly known as CrackMapExec.

Features

This MCP server enables AI assistants to execute NetExec commands via SSH to a Kali Linux machine, supporting:

Additional features:

• Password spraying across all protocols
• Module management and execution
• SMB share enumeration and file operations
• NetExec credential database queries

Prerequisites

• Node.js 18+
• SSH access to a Kali Linux machine with NetExec installed
• SSH key-based authentication (recommended) or password

Installation

# Clone the repository
git clone https://github.com/schwarztim/sec-netexec-mcp.git
cd sec-netexec-mcp

# Install dependencies
npm install

# Build the project
npm run build

Configuration

Environment Variables

Claude Desktop Configuration

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "netexec": {
      "command": "node",
      "args": ["/path/to/sec-netexec-mcp/dist/index.js"],
      "env": {
        "KALI_HOST": "your-kali-host",
        "SSH_USER": "kali",
        "SSH_KEY": "/path/to/ssh/key"
      }
    }
  }
}

Available Tools

nxc_smb

SMB protocol operations including enumeration, share listing, user/group/session enumeration, credential dumping (SAM, LSA, NTDS), and command execution.

nxc_winrm

WinRM remote management for authentication testing, cmd/PowerShell execution, and credential dumping.

nxc_ssh

SSH protocol for authentication testing, key-based auth, and remote command execution.

nxc_ldap

LDAP/Active Directory operations including user/group/computer enumeration, Kerberoasting, ASREPRoast, BloodHound collection, and trust enumeration.

nxc_mssql

SQL Server operations including queries, xp_cmdshell execution, and login enumeration.

nxc_rdp

RDP credential validation and screenshot capture.

nxc_wmi

WMI-based command execution on Windows targets.

nxc_modules

List and query available NetExec modules for each protocol.

nxc_spray

Password spraying with configurable options including user/password lists, jitter, and continue-on-success.

nxc_shares

SMB share enumeration and file operations (spider, get, put).

nxc_raw

Execute raw NetExec commands for advanced scenarios not covered by other tools.

nxc_database

Query the NetExec credential database for stored hosts and credentials.

Usage Examples

Enumerate SMB Hosts

{
  "tool": "nxc_smb",
  "arguments": {
    "target": "192.168.1.0/24"
  }
}

List Shares with Credentials

{
  "tool": "nxc_smb",
  "arguments": {
    "target": "192.168.1.10",
    "username": "admin",
    "password": "P@ssw0rd",
    "domain": "CORP",
    "action": "shares"
  }
}

Pass-the-Hash Attack

{
  "tool": "nxc_smb",
  "arguments": {
    "target": "192.168.1.10",
    "username": "admin",
    "hash": "aad3b435b51404eeaad3b435b51404ee:5fbc3d5fec8206a30f4b6c473d68ae76",
    "domain": "CORP",
    "action": "shares"
  }
}

Password Spray

{
  "tool": "nxc_spray",
  "arguments": {
    "protocol": "smb",
    "target": "192.168.1.0/24",
    "userList": "/tmp/users.txt",
    "password": "Summer2024!",
    "domain": "CORP",
    "continueOnSuccess": true
  }
}

BloodHound Collection

{
  "tool": "nxc_ldap",
  "arguments": {
    "target": "dc01.corp.local",
    "username": "user",
    "password": "password",
    "domain": "CORP",
    "action": "bloodhound",
    "bloodhoundCollection": "All"
  }
}

Dump NTDS from Domain Controller

{
  "tool": "nxc_smb",
  "arguments": {
    "target": "dc01.corp.local",
    "username": "admin",
    "password": "P@ssw0rd",
    "domain": "CORP",
    "action": "ntds"
  }
}

Security Considerations

This tool is intended for authorized security testing only. Always ensure you have:

• Written authorization to test target systems
• Proper scope definition for penetration testing engagements
• Compliance with applicable laws and regulations

Never use this tool against systems you do not have explicit permission to test.

Development

# Watch mode for development
npm run dev

# Build for production
npm run build

# Start the server
npm start

Architecture

┌─────────────────┐     ┌──────────────────┐     ┌────────────────┐
│   AI Assistant  │────▶│  NetExec MCP     │────▶│  Kali Linux    │
│  (Claude, etc.) │     │  Server (Node.js)│ SSH │  (nxc)         │
└─────────────────┘     └──────────────────┘     └────────────────┘
                              │
                              │ stdio
                              ▼
                        ┌──────────────┐
                        │ MCP Protocol │
                        └──────────────┘

References

• NetExec Official Wiki
• NetExec GitHub Repository
• Model Context Protocol
• NetExec Cheat Sheet
• Kali Linux NetExec

License

This project is licensed under the MIT License - see the LICENSE file for details.

Disclaimer

This software is provided for educational and authorized security testing purposes only. The authors are not responsible for any misuse or damage caused by this program. Users are responsible for ensuring compliance with all applicable laws and regulations.