Writing a Basic Burp Extension in Python

Burp Suite is a popular web security testing tool that helps you secure web applications by testing and validating vulnerabilities. It’s a comprehensive platform for performing security assessments on web applications, and its extensibility is one of its key features.

Burp Suite extensions are add-ons that allow you to customize and extend the functionality of Burp Suite. These extensions can be written in any JVM-compatible language, including Java, Python, and Ruby. In this article, we’ll focus on writing a Burp Suite extension using Python.

Why write a Burp Suite extension in Python:

Python is a popular programming language for security testing and is widely used in the security community. It’s a high-level language that’s easy to read and write, making it a great choice for writing Burp Suite extensions. Python also has a large number of libraries and tools that you can use to extend the functionality of Burp Suite.

Getting started with writing a Burp Suite extension in Python:

Install Python: You’ll need to have Python installed on your system to write a Burp Suite extension in Python. You can download and install Python from the official website (https://www.python.org/) .

Install the Python Jython library: Jython is a library that allows you to run Python code on the Java virtual machine. You’ll need to install this library to write a Burp Suite extension in Python. You can download the Jython library from the official website (http://www.jython.org/) .

Install Burp Suite: You’ll need to have Burp Suite installed on your system to test and run your Burp Suite extension. You can download Burp Suite from the official website (https://portswigger.net/burp) .

Write the code: Now that you’ve got all the necessary tools installed, it’s time to start writing your Burp Suite extension. Here’s a simple example of a Burp Suite extension in Python that prints the request and response details for each request/response processed by Burp Suite:

from burp import IBurpExtender
from burp import IHttpListener


class BurpExtender(IBurpExtender, IHttpListener):

    def registerExtenderCallbacks(self, callbacks):
        self._callbacks = callbacks
        self._helpers = callbacks.getHelpers()
        callbacks.setExtensionName("Example extension”)callbacks.registerHttpListener(self)


def processHttpMessage(self, toolFlag, messageIsRequest, messageInfo):
    if messageIsRequest:
        request = self._helpers.bytesToString(messageInfo.getRequest())
        print("Request:”)"
              "print(request)
    else:
        response = self._helpers.bytesToString(messageInfo.getResponse())
        print("Response:”)
        print(response)

Writing a Burp Suite extension in Python is a great way to extend the functionality of Burp Suite and automate your web security testing.