Login [Mobile]
Simple mobile reversing challenge (that doesn’t require much mobile knowledge XD). First mobile challenge from DSO-NUS 2021.
FlashyLighty [Mobile]
Mobile reversing challenge that uses time of execution to check for conditions. Third mobile challenge from DSO-NUS 2021.
Three Trials [RE]
Simple reversing challenge with some math. First RE challenge from DSO-NUS 2021.
Insecure [Pwn]
Exploit a program that changes user privilege to root with setuid() to escalate privilege. First pwn challenge from DSO-NUS 2021.
NyaVM [RE]
Read. Understand. Patch. Get flag. A cool challenge that requires patching binaries. Second RE challenge from DSO-NUS 2021.
Space Playwright [RE]
Reverse a program written in Shakespeare Programming Language (SPL). Second RE challenge in STANDCON2021.
Ancient Computing [Forensics]
Study and understand a very old file spreadsheet format (WK1 for Lotus 1-2-3), then retrieve data stored in a cell. First forensics challenge from STANDCON20...
Airlock Breakout [RE]
JavaScript flag checking functions solved using z3-solver. First RE challenge from STANDCON 2021.
What do the numbas mean? [RE]
Analyze python Intermediate Representation and recover the flag. First RE challenge from CTF.SG 2021.
Haachama cooking [RE]
A simple Golang binary reversing challenge with some AES. Second RE challenge from CTF.SG 2021.
Take Control [Pwn]
Simple Return Oriented Programming challenge. Second pwn challenge in CDDC2021.
POP IT [Pwn]
Python code injection attack on an echo server. Third pwn challenge in CDDC2021.
Dice Is You [RE]
A wasm reversing challenge using closure compiler to simplify code, and z3 to solve for final solution.
The Watness III [RE, Web]
Reverse engineer a WebGL game by reversing its fragment shader program. First RE and Web challenge from Plaid CTF 2021.