hsctf_writeups

Writeups i wrote for flags captured during High-school capture the flag

What is a CTF

src: wikipedia
In computer security, Capture the Flag (CTF), a type of wargame, is a computer security competition. CTF contests are usually designed to serve as an educational exercise to give participants experience in securing a machine, as well as conducting and reacting to the sort of attacks found in the real world (i.e., bug bounty programs in professional settings). Reverse-engineering, network sniffing, protocol analysis, system administration, programming, and cryptanalysis are all skills which have been required by prior CTF contests at DEF CON. There are three main styles of capture the flag competitions: attack/defense, hardware challenges and jeopardy.

What is HSCTF

HSCTF is an international online hacking competition designed to educate high schoolers in computer science. Teams of up to 5 students will be challenged to....

• Crack Codes
• Reverse Engineer
• Design Algorithms
• Master The Internet

Why did i participate

I participated in this ctf because when i discovered googlectf in a youtube video, it made me interested in ctfs as i had some notions in cybersecurity, i searched for a team and mine was pretty awesome

Major takeaways

• Some stego tools
• Cyberchef
• Crypto notions
• Burp suite and it's uses
• Netcat
• Some common vulnerabilities i did not know of

Writeups:

Binary exploitation:

• Intro to netcat2

forensics

• Mad libs
• Comments
• Meta mountains
• Traffic Lights F
• We love Puppies

Algorithms:

• Pythagorean tree fractal 1
• Pythagorean tree fractal 2

Reverse engineering

• AP labs: Cs primer

Crypto

• xored
• Morbid
• Unexpected

Misc

• Does ctf work
• Discord flag
• Do stars spin?
• Primes
• Bored out of my mined
• My first calculator
• Binary word search

Web exploitation

• Blurry eyes
• Debt simulator
• Inspector gadget
• Broken tokens
• Trafic Lights
• Very safe login