CTF Writeups

Reverse Engineering Challenges And CTF Solutions

7th April, 2024

Zero Days CTF (2024) RE - 5

In this final challenge of ZeroDays CTF 2024, participants are presented with a captivating reverse engineering task encapsulated in the 'the_kings_secret.zip' challenge. As we embark on this journey, we navigate through the provided ZIP file, unraveling its intricacies to uncover hidden insights and solutions. Join us as we delve into the depths of reverse engineering, exploring the complexities of executable analysis and decryption techniques to unlock the secrets concealed within.

6th April, 2024

Zero Days CTF (2024) RE - 4

Dive into the intriguing world of binary analysis with the fourth challenge, 'acup.exe'. Discover the secrets hidden within this packed executable file, as we unravel its obfuscated code and delve into its cryptographic algorithms. Through meticulous examination, we uncover the ingenious methods employed to conceal its true purpose. However, the journey doesn't end there - further exploration reveals the key to decrypting the flag, awaiting those who dare to venture into the depths of its intricacies.

5th April, 2024

Zero Days CTF (2024) RE - 1

Embark on the inaugural reverse engineering CTF challenge, 'mystery.pyc', to unravel Python's .pyc file intricacies. Explore compiled bytecode and decompiled output, culminating in flag reconstruction using CyberChef.

5th April, 2024

Zero Days CTF (2024) RE - 2

In this challenge, we'll explore binary analysis, focusing on binary file formats, executable packers, and static analysis techniques. We'll examine the structure of executables, how packers like UPX compress them, and how to unpack and analyze such binaries using tools like HxD, Detect-It-Easy, and Binary Ninja. Through this exploration, we'll uncover hidden information and potential flags within binary files.

5th April, 2024

Zero Days CTF (2024) RE - 3

This challenge involves navigating a compressed archive frequently utilized for software distribution and file archiving in Unix-like environments. The archive's dual compression method reduces file size effectively. Participants are tasked with exploring the archive's contents to gain insights, emphasizing asset analysis over immediate reverse engineering.