SECCON security contest 2017 writeups

noras noras |

Tags: #CTF #Forensics #Steganography

After more than 6 month of not playing any CTF… I decided to join ChalmersCTF to play SECCON. After giving it about 2+ hours I could solve 4 challenges. And here is how I did it. Run me! (Programming 100 points) Run me! —– import sys sys.setrecursionlimit(99999) def f(n): return n if n < … Continue reading “SECCON security contest 2017 writeups”

Tags: #CTF #Reverse engineering #Side channel attack #Steganography

From time-based side-channel, automated reverse-engineering¬†and classic steganography… Here is a list of challenges I thought were interesting and how I solved them. Let’s begin by summing up the mentioned problems: scratches : is about automating a solution for a simple crack-me reverse challenge. Taylor’s Magical Flag Oracle: is about a time based side channel attack. … Continue reading “UIUCTF 2017 writeups”

Tags: #Cryptography #CTF #Forensics #Reverse engineering #Steganography

For the past year I’ve been competing in almost every CTF announced on, with my team that we have created at our university called ChalmersCTF. For those who doesn’t know what CTF stands for I suggest reading this description. Here are a list of challenges that I though were interesting for me that has … Continue reading “TAMUctf 2017 Writeups”

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