Stack the Flags 2020

A local Singaporean CTF hosted by GovTech, where we managed to place 3rd under the name ItzyBitzySpider. I participated in this CTF with my regular teammates in the JC category, @jloh02, @OceanKoh, @NyxTo. Many of the writeups below were written by them, so credits to them.

Challenge Writeups

Reversing
An invitation [981]

Web
Unlock Me [905]

Cryptography
Can COViD steal Bob’s idea? [960]

Forensics
Walking down a colourful memory lane [992] Voices in the head [1692]

Mobile
A to Z of COViD! [1986]

Internet of Things (IoT)
COVID’s Communication Technology! [984] I smell updates! [1986]

Cloud
Find the leaking bucket! [978]

Open Source Intelligence (OSINT)
Only time will tell! [691] Sounds of freedom! [750] What is he working on? Some high value project? [790] Hunt him down! [970] Who are the possible kidnappers? [1990]

Social Engineering
Can you trick OrgX into giving away their credentials? [2000]