Inside Ransomware: Practical Construction, Cryptography, and Botnet Managemen

Link to Course: https://www.udemy.com/course/ethical-hacking-daniel-graham-video-companion/?referralCode=C56EEA92D994AF5F2EBE In this lecture, we delve into the concept of ransomware, a type of malicious software that encrypts data on victim machines. The discussion includes building a basic ransomware that targets a single file, understanding the role of a reverse shell for communication, and implementing encryption with symmetric key algorithms like AES in counter mode. We explore storing and protecting keys using both symmetric and asymmetric cryptography, explaining how to use a public and private key pair to maintain security. The lecture also covers managing large botnets and the computational implications of different encryption techniques. Throughout, references to a detailed PDF and Python code examples are provided to aid in implementing your own ransomware for the week's homework. 00:00 Introduction to Ransomware 00:36 Building Your Own Ransomware 00:45 Reverse Shell and Communication 01:40 Encryption Techniques 02:13 Key Management Strategies 04:35 Asymmetric Key Cryptography 06:57 Combining Symmetric and Asymmetric Methods 09:13 Botnets and Ransomware Networks 11:46 Conclusion and Further Learning