Cryptography for secure communication

In this section, we will learn how to implement cryptography for secure malware communication: we will create the simplest information stealer malware that will carry out encryption and transmit it over a secure channel.

Let’s dive into an example of implementing secure communication using a common scenario of encrypting and decrypting messages between two parties.

Practical example

Let’s create a basic example with two programs: a receiver (Linux HTTPS server) for receiving information from client programs (Windows malware).

To do so, we’ll create a Python HTTPS server: https://github.com/PacktPublishing/Malware-Development-for-Ethical-Hackers/blob/main/chapter11/02-malware-communication/server.py.

The logic is pretty simple: receive a POST request, decrypt the data, and print the result.

Let’s break down the code and explain each part. First, we must import the necessary modules:

import http.server...