> For the complete documentation index, see [llms.txt](https://angelica.gitbook.io/hacktricks/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://angelica.gitbook.io/hacktricks/network-services-pentesting/pentesting-modbus.md).

# 502 - Pentesting Modbus

{% hint style="success" %}
Learn & practice AWS Hacking:<img src="/files/Xcgr3q6BP5MpWT3hTn6d" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/files/Xcgr3q6BP5MpWT3hTn6d" alt="" data-size="line">\
Learn & practice GCP Hacking: <img src="/files/aQnEyHWQGyok3qCc92qt" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/files/aQnEyHWQGyok3qCc92qt" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)

<details>

<summary>Support HackTricks</summary>

* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks_live)**.**
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.

</details>
{% endhint %}

<figure><img src="/files/wkmyDmsvKJMEUQuPRvN4" alt=""><figcaption></figcaption></figure>

**Get a hacker's perspective on your web apps, network, and cloud**

**Find and report critical, exploitable vulnerabilities with real business impact.** Use our 20+ custom tools to map the attack surface, find security issues that let you escalate privileges, and use automated exploits to collect essential evidence, turning your hard work into persuasive reports.

{% embed url="<https://pentest-tools.com/?utm_term=jul2024&utm_medium=link&utm_source=hacktricks&utm_campaign=spons>" %}

## Basic Information

In 1979, the **Modbus Protocol** was developed by Modicon, serving as a messaging structure. Its primary use involves facilitating communication between intelligent devices, operating under a master-slave/client-server model. This protocol plays a crucial role in enabling devices to exchange data efficiently.

**Default port:** 502

```
PORT    STATE SERVICE
502/tcp open  modbus
```

## Enumeration

```bash
nmap --script modbus-discover -p 502 <IP>
msf> use auxiliary/scanner/scada/modbusdetect
msf> use auxiliary/scanner/scada/modbus_findunitid
```

{% hint style="success" %}
Learn & practice AWS Hacking:<img src="/files/Xcgr3q6BP5MpWT3hTn6d" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/files/Xcgr3q6BP5MpWT3hTn6d" alt="" data-size="line">\
Learn & practice GCP Hacking: <img src="/files/aQnEyHWQGyok3qCc92qt" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/files/aQnEyHWQGyok3qCc92qt" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)

<details>

<summary>Support HackTricks</summary>

<img src="/files/wkmyDmsvKJMEUQuPRvN4" alt="" data-size="original">

**Get a hacker's perspective on your web apps, network, and cloud**

**Find and report critical, exploitable vulnerabilities with real business impact.** Use our 20+ custom tools to map the attack surface, find security issues that let you escalate privileges, and use automated exploits to collect essential evidence, turning your hard work into persuasive reports.

* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks_live)**.**
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.

</details>
{% endhint %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://angelica.gitbook.io/hacktricks/network-services-pentesting/pentesting-modbus.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.