Break In CTF 2018

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Tags: #CTF #Web security

Aalekh and his business Aalekh joined IIIT in 2014. Soon, he started selling T-shirts and hoodies. One day, Aalekh got a big order and trusted his childhood friend to handle the order. But his friend betrayed him and sold bad pieces. College students got angry and tried to beat Aalekh up. His good friend, Anshul, … Continue reading “Break In CTF 2018”

Tags: #CTF #Python #Web security

I always like to give the forensics challenges a chance at CTFs that I don’t intend to play seriously because lack of time in my schedule. This challenge was kinnda classic with a binary file encoded as colors in a web page. Here is my solution. Bit Map – 500 Points We’re developing our own … Continue reading “3DSCTF 2017 writeup – Bit Map”

Tags: #Android #CTF #Java #Reverse engineering

I did not have so much time this weekend to spend on CTF. However I managed to solve few challenges from different CTF that were running at the same time. One of them being InCTF. I was surprised to see the mobile challenge category and went immediately to check the first challenge. Rev 150 There … Continue reading “InCTF 2017 mobile Rev challenge writeup”

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! —– RunMe.py 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 CTFtime.org, 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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