Tag Archives: rsa

WanaCryptor File Encryption and Decryption

Introduction This is a quick post about the WanaCryptor ransomware wreaking havoc on many networks across the world this weekend. With all the news coverage, most of you already know the trouble caused by it. Once executed on a system, … Continue reading

Posted in cryptography, encryption, malware, public key exchange, security, windows | Tagged , , , , , , , , | 8 Comments

Shellcode: A Windows PIC using RSA-2048 key exchange, AES-256, SHA-3

Introduction This won’t be a tutorial on writing shellcode although you might glean something useful from the source code when writing your own PIC in C. This is a PIC (Position Independent Code) for the Windows Operating System written in … Continue reading

Posted in assembly, cryptography, diffie hellman merkle, networking, programming, public key exchange, security, shellcode, windows | Tagged , , , , , , , | 1 Comment

Windows: Interactive shells Part 4

Introduction Just to summarize what we’ve looked at so far in parts 1-3 Create a simple shell where a socket is assigned to stdin, stdout and stderr of cmd.exe. Use synchronization to handle unexpected closure of socket or termination of … Continue reading

Posted in cryptography, networking, programming, security, windows | Tagged , , , , , , , , | 1 Comment