Category: H4CK1T CTF 2016

There is an .rtf file. Considering that the title of this challenge is RTFspy, there must be something in this file. First, of course, I tried to open it in the...

Just like I did with Canada – 1n51d3r’5 j0b and Germany – ch17ch47, I started grep'ing. As there was only one file, which was a pcap, I chose to first look for ...

The ZIP archive attached to the challenge contains a ./Docs directory that held several files and directories. First, I looked at all the files to get some idea...

The attached ZIP archive contained an image called planet.png. It was a regular-looking image, so let's look for any hidden stuff inside. First, I looked for...

Attached was a .pcap file. An easy approach of getting any interesting files from the pcap is using the tool foremost. It carves the file by searching through t...

Germany appeared to be another challenge that seems to contain an unintended way to solve it. Just like I did when solving Canada – 1n51d3r’5 j0b, I started ...

The solution on this one is quite simple, probably due to a mistake made by the developer. Still, a simple solution is also a solution. First, I extracted th...

The target was a normal looking website. It did not have too much interesting user interaction etc., except for three pages (which I believe were home, about an...

The challenge file consisted of only one file of unknown type. First thing to try is to run the file command to see what we are dealing with.

As it seems, the script created the image pixel by pixel using the putpixel function from the PIL module for Python. This means that, for each pixel, an X and Y...