# Informação Básica

O Protocolo Modbus é uma estrutura de mensagens desenvolvida pela Modicon em 1979. É usado para estabelecer comunicação mestre-escravo/cliente-servidor entre dispositivos inteligentes.

**Porta padrão:** 502
```
PORT    STATE SERVICE
502/tcp open  modbus
```
# Enumeração

## Modbus TCP

### Nmap

```bash
nmap -sV --script modbus-discover <target>
```

### Modscan

Modscan is a tool that can be used to perform Modbus enumeration and exploitation.

```bash
modscan32.exe <target>
```

### mbtget

mbtget is a tool that can be used to read and write Modbus registers.

```bash
mbtget -a <target>
```

### Metasploit

Metasploit has a module that can be used to perform Modbus enumeration and exploitation.

```bash
use auxiliary/scanner/scada/modbusclient
```

### Other tools

Other tools that can be used for Modbus enumeration and exploitation include:

- [CAS Modbus Scanner](https://www.chipkin.com/products/software/modbus-software/cas-modbus-scanner/)
- [Simply Modbus](http://www.simplymodbus.ca/)
- [Modbus Poll](https://www.modbustools.com/modbus_poll.html)

## Modbus RTU

### mbtget

mbtget can also be used to read and write Modbus RTU registers.

```bash
mbtget -s /dev/ttyS0 -a <target>
```

### Other tools

Other tools that can be used for Modbus RTU enumeration and exploitation include:

- [CAS Modbus Scanner](https://www.chipkin.com/products/software/modbus-software/cas-modbus-scanner/)
- [Simply Modbus](http://www.simplymodbus.ca/)
- [Modbus Poll](https://www.modbustools.com/modbus_poll.html)
```bash
nmap --script modbus-discover -p 502 <IP>
msf> use auxiliary/scanner/scada/modbusdetect
msf> use auxiliary/scanner/scada/modbus_findunitid
```
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