BroncoCTF : Atomic Substitution Theory Writeup

BroncoCTF featured two distinct challenges. The Atomic Substitution Theory task involved decoding secret.txt, which contained comma-separated tuples of small integers and literal tokens like braces and underscores, suggesting a coordinate lookup cipher for the bronco{...} flag format. Meanwhile, the Negative Bread challenge provided an ELF 64-bit LSB executable named bank. This menu-driven simulator required users to increase a starting balance of $100 to $1,000,000 using deposits, withdrawals, investments, and a one-time charge dispute to buy the flag.