#gdb
2 writeups
encrypter
QnQSec · 2025 · Sep 20, 2025
AES-256-CBC with the key produced by embedded shellcode. Break on EVP_EncryptInit_ex at runtime, read the key/IV out of registers, decrypt offline.
#aes #openssl #gdb #shellcode
medium nimrod
ImaginaryCTF 2025 · 2025 · Jul 5, 2025
Stripped Nim binary that XORs input with a keystream derived from a hard seed. Extract the keystream at runtime with gdb and XOR out the flag.
#nim #xor #gdb #keystream
easy