2021

CryptoCat's capture the flag challenge writeups, solve scripts and video walkthroughs 💜

Pico

• Pwn: Unsubscriptions Are Free

Crusaders of Rust (COR)

• Crypto: Fibinary

• Pwn: Chainblock

HTB Cyber Santa

• Crypto: Meet Me Halfway

• Crypto: Xmas Spirit

• Pwn: Minimelfistic

• Pwn: Mr. Snowy

• Pwn: Naughty List

• Pwn: Sleigh

• Rev: Infiltration

• Rev: Intercept

K3rn3l

• Crypto: Badseed

• Crypto: Twizzty Buzzinezz

HTB x Synack RedTeamFive

• Misc: Context

• Misc: Hotel

• Pwn: Air Supplies

• Pwn: Injection Shot

• Pwn: Library

• Pwn: Recruitment

• Rev: Knock Knock

• Rev: Split

KillerQueen

• Pwn: A Kind of Magic

• Pwn: Tweety Birb

• Pwn: Zoom2Win

HacktivityCon

• Pwn: Retcheck

• Pwn: The Library

• Pwn: Yabo

• Web: Availability

CSAW

• Pwn: Alien Math

• Pwn: Password Checker

• Rev: Checker

HackyHolidays

• Crypto: Cute Invoice

• Crypto: Mineslazer

• Forensics: Injection Traffic

• Forensics: Power Snacks

• Pwn: Deleted Flag

• Pwn: Engine Control

• Web: Skylark

HTB Cyber Apocalypse

• Crypto: Phasestream

• Misc: Alien Camp

• Misc: Build Yourself In

• Pwn: Controller

• Pwn: System Drop

• Web: Blitzprop

• Web: E-Tree

• Web: Wild Goose Hunt

Angstrom

• Pwn: Sanity Checks

• Pwn: Secure Login

• Pwn: Sticky Stacks

• Pwn: Tranquil

• Rev: Free Flags

• Rev: Jailbreak

• Web: Jar