11 writeups

picoCTF - Reverse Engineering

picoCTF reverse-engineering challenge writeups.

picoCTF Add On Trap writeup analyzing a binary with anti-debugging traps and reversing the validation to extract the correct flag.

picoCTF AutoRev 1 writeup using automated reverse engineering tools like angr or Z3 to solve constraint-based flag validation.

picoCTF Binary Instrumentation 3 writeup using dynamic binary instrumentation tools like Frida or Pin to trace and solve the challenge.

picoCTF Binary Instrumentation 4 writeup applying advanced instrumentation techniques to hook functions and extract the flag at runtime.

picoCTF Bypass Me writeup patching or reversing binary validation logic to bypass authentication checks and reveal the flag.

picoCTF Gatekeeper writeup reversing a gatekeeper binary with multiple validation stages to find the correct input sequence for the flag.

picoCTF Hidden Cipher 1 writeup reversing an encryption algorithm to decode the hidden flag from ciphertext output.

picoCTF Hidden Cipher 2 writeup tackling a more complex cipher implementation requiring deeper static analysis to reverse the encoding.

picoCTF JITFP writeup reversing a just-in-time compiled program, analyzing dynamically generated code to understand flag computation.

picoCTF Secure Password Database writeup reversing a password database application to extract stored credentials and recover the flag.

picoCTF Silent Stream writeup recovering hidden data from a binary that outputs the flag through non-obvious channels or side effects.