Discussing a ransomware sample that contains inherent flaws in its cryptographic design. Although well-established cryptographic primitives are used (like AES), they are used in a flawed way and introduce vulnerabilities that when exploited, lead to the decryption of ransomed files without knowing the encryption password and/or key.

In this 2 hour workshop, Didier will guide you through XOR Cryptanalysis exercises using several open source tools (several of these tools are created and maintained by Didier).