picoCTF-2021

picoCTF 2021 Write-Ups by Team Cha0s (final score:8720 , final placement globaly:23rd).

For the following tables, :white_check_mark: indicates a completed puzzle and write-up, and :x: an incomplete puzzle.

General Skills

Name	Points	Done
Obedient Cat	5	✅
Python Wrangling	10	✅
Wave a flag	10	✅
Nice netcat...	15	✅
Static ain't always noise	20	✅
Tab, Tab, Attack	20	✅
Magikarp Ground Mission	30	✅

Forensics

Name	Points	Done
information	10	✅
Weird File	20	✅
Matryoshka doll	30	✅
tunn3l v1s10n	40	✅
Wireshark doo dooo do doo...	50	✅
MacroHard WeakEdge	60	✅
Trivial Flag Transfer Protocol	90	✅
Wireshark twoo twooo two twoo...	100	✅
Disk, disk, sleuth!	110	✅
Disk, disk, sleuth! II	130	✅
Surfing the Waves	150	✅
Milkslap	200	✅
Very very very Hidden	300	✅

Web Exploitation

Name	Points	Done
Ancient History	10	✅
GET aHEAD	20	✅
Cookies	40	✅
Scavenger Hunt	50	✅
Who are you?	60	✅
Some Assembly Required 1	70	✅
More Cookies	90	✅
It is my Birthday	100	✅
Some Assembly Required 2	110	✅
Super Serial	130	✅
Most Cookies	150	✅
Some Assembly Required 3	160	✅
Web Gauntlet 2	170	✅
Startup Company	180	✅
Some Assembly Required 4	200	✅
X marks the spot	250	✅
Web Gauntlet 3	300	✅
Bithug	500	✅

Cryptography

Name	Points	Done
Mod 26	10	✅
Mind your Ps and Qs	20	✅
Easy Peasy	40	✅
New Caeser	60	✅
Mini RSA	70	✅
Dacshund Attacks	80	✅
No Padding, No Problem	90	✅
It's Not My Fault 1	100	✅
Play Nice	110	✅
Double DES	120	✅
Compress and Attack	130	✅
Scrambled RSA	140	✅
It is my Birthday 2	170	✅
Pixelated	200	✅
New Vignere	300	✅
It's not my Fault 2	400	✅
Clouds	500	❌

Binary Exploitation

Name	Points	Done
Binary Gauntlet 0	10	✅
Stonks	20	✅
Binary Gauntlet 1	30	✅
What's your input?	50	✅
Binary Gauntlet 2	50	✅
Cache Me Outside	70	✅

Reverse Engineering