• Sat. Apr 17th, 2021

CTF Writeups

Writeups of CTF challenges

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  • Objective 10 – Defeat Fingerprint Sensor

Objective 10 – Defeat Fingerprint Sensor

For this challenge all we require is the use of chromes dev tools. If you are not familiar with using browser dev tools this guide video proved useful to me…

Objective 9 – ARP Shenanigans

The ARP shenanigans objective contains several moving parts that need to be completed in order to gain shell access to the hijacked server I would say the best starting point…

Objective 8 – Broken Tag Generator

For the broken tag generator the first step is to load up a burp proxy and try uploading pictures/ non pictures and look at the results. When uploading an erroneous…

Objective 7 – Solve the Sleigh’s CAN-D-BUS Problem

So for this challenge first step was to watch the Sans video can bus can can https://www.youtube.com/watch?v=96u-uHRBI0I which gave some good insight into how to interpret can bus data. Now…

Objective 6 – Splunk challenge

For this one first thing you need to do is be Santa otherwise you cannot get access to do this you need to enter the room you opened in the…

Challenge 5 – Open HID Lock

So for this challenge we first need to pick up the Proxmark3 which should be laying around in the backroom of the workshop. Once obtained I watched the video from…

Objective 4 – Operate the Santavator

So this challenge is fairly straight forward and there is two ways to do it first way is to collect items dotted around the map which include screws, straw ,…

Objective 3 – Point of Sale Password Recovery

The third objective involved us needing to obtain the password for the point of sale terminal and we are provided with an executable binary of the file. The first thing…

Objective 2 – Investigate S3 bucket

For this task we needed to identify an insecure s3 bucket obtain a payload in the form of an overly wrapped present 😛 and  retrieve a text string from the…

Objective 1 – Uncover Santa’s Gift List

For this challenge the power of the lovely open source GIMP (GNU graphics manipulation program) Proved my salvation. After loading the initial image into gimp I selected the area where…

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