TSG CTF 2020

Challenges List

Name	Genre	Difficulty	Author	Solves
Sanity Check	Misc	sanity	@hakatashi	605
Beginner's Pwn	Pwn	beginner	@moratorium08	42
Detective	Pwn	easy	@moratorium08	14
Violence Fixer	Pwn	easy	@smallkirby_	13
RACHELL	Pwn	med-hard	@smallkirby_	7
Karte	Pwn	easy	@smallkirby_	6
std::vector	Pwn	med-hard	@moratorium08	5
Beginner's Web	Web	beginner	@hakatashi	31
Note	Web	hard	@kcz146	7 (Part1), 3 (Part2)
Slick Logger	Web	medium	@hakatashi	5
Beginner's Crypto	Crypto	beginner	@hakatashi	86
Sweet like Apple Pie	Crypto	medium	@hakatashi	24
Rubikrypto	Crypto	easy	@hakatashi	12
Modulus Amittendus	Crypto	medium	@hakatashi	5
Reverse-ing	Rev	easy	@satos---jp	74
ONNXrev	Rev	med-hard	@satos---jp	3
Beginner's Misc	Misc	beginner	@hakatashi	36
BlindCoder	Misc	medium	@hakatashi	9
Self Host	Misc	medium	@satos---jp	8
Poor Stego Guy	Misc	hard	@hakatashi	3
Slowest Decryption	ppc	medium	@naan4UGen	16

Official writeups are placed in the file writeup.md of each directory.

Release Schedule

Release time	Name	Genre	Difficulty
0:00	Sanity Check	Misc	sanity
0:00	Beginner's Crypto	Crypto	beginner
0:00	Beginner's Pwn	Pwn	beginner
0:00	Beginner's Web	Web	beginner
0:00	Beginner's Misc	Misc	beginner
0:00	Reverse-ing	Rev	easy
0:00	std::vector	Pwn	med-hard
0:00	Poor Stego Guy	Misc	hard
1:00	Detective	Pwn	easy
2:00	Modulus Amittendus	Crypto	medium
3:00	Self Host	Misc	medium
4:00	Note	Web	hard
5:00	ONNXrev	Rev	med-hard
6:00	RACHELL	Pwn	med-hard
6:00	BlindCoder	Misc	medium
7:00	Violence Fixer	Pwn	easy
8:00	Sweet like Apple Pie	Crypto	medium
9:00	Slowest Decryption	ppc	medium
10:00	Karte	Pwn	easy
11:00	Slick Logger	Web	medium
12:00	Rubikrypto	Crypto	easy
18:00	Survey

External Write-ups

English

Also take a look at CTFTime :)

• exploit.py - GitHub Gist
  • Beginner's Web
• CTF-Docs/Beginners-Web.md at master · TeamUnderdawgs/CTF-Docs
  • Beginner's Web
• Beginner's Crypto writeup - GitHub Gist
  • Beginner's Crypto
• Sweet like Apple Pie writeup - GitHub Gist
  • Sweet like Apple Pie
• Rubikrypto writeup - GitHub Gist
  • Rubikrypto
• Modulus Amittendus writeup - GitHub Gist
  • Modulus Amittendus
• [TSG CTF 2020] Reverse-ing - FiR333
  • Reverse-ing
• TSG CTF 2020 - std::vector - GitHub Gist
  • std::vector
• TSG CTF 2020 - Karte - GitHub Gist
  • Karte
• TSG CTF 2020 Writeup - CTFするぞ
  • Beginner's Pwn, Detective, Violence Fixer, RACHELL, Karte
• CTF-writeups/2020/tsgctf/std-vec at master · pr0cf5/CTF-writeups
  • std::vector
• CTFWriteups/2020/TSG CTF at 2020 · shift-crops/CTFWriteups
  • Beginner's Pwn, Detective, RACHELL, Violence Fixer
• tsg-ctf-2020-slick-logger.py - GitHub Gist
  • Slick Logger
• tsgctf-note1 - GitHub Gist
  • Note
• TSGCTF Note (both 1 and 2) - GitHub Gist
  • Note, Note2
• TSG CTF 2020 writeup by NaruseJun - HackMD
  • Reverse-ing
• TSG CTF 2020 onnxrev write-up - GitHub Gist
  • ONNXrev
• CTF-writeups/TSG CTF 2020 at master · S3v3ru5/CTF-writeups
  • Beginner's Crypto, Modulus Amittendus
• CTFium/TSGCTF/2020 at master · sajjadium/CTFium
  • Beginner's Pwn, Detective, Karte, RACHELL, std::vector, Violence Fixer
• TSGCTF 2020 rubikrypto - GitHub Gist
  • Rubikrypto

Japanese

• TSG CTF 2020 writeup - YouTube
  • Beginner's Crypto, Beginner's Misc
• TSGCTF 2020 writeup slowest decryption - YouTube
  • Slowest Decryption
• Beginner's Web [TSG CTF 2020] - はまやんはまやんはまやん
  • Beginner's Web
• TSG CTF 2020 write-up - Qiita
  • Beginner's Pwn, Beginner's Web, Beginner's Crypto, Sweet like Apple Pie, Rubikrypto, Reverse-ing, Beginner's Misc, BlindCoder, Slowest Decryption
• TSG CTF 2020 writeup (Beginner's Web, Note 1) - Ark's Blog
  • Beginner's Web, Note
• TSGCTF 2020 Write-Up - 雑記
  • Beginner's Misc, Self Host
• TSG CTF 2020 - Detective - HackMD
  • Detective
• TSG CTF 2020 - Karte - HackMD
  • Karte
• TSG CTF 2020 - RACHELL - HackMD
  • RACHELL
• TSGCTF 2020 Writeup - Qiita
  • Beginner's Crypto, Sweet like Apple Pie
• TSGCTF2020writeup.ja.md - GitHub Gist
  • Beginner's Crypto, Sweet like Apple Pie, Rubikrypto, Modulus Amittendus, Beginner's Misc, BlindCoder, Slowest Decryption
• TSG CTF 2020 Writeup - h_nosonの日記
  • Beginner's Pwn, Detective
• TSG CTF 2020 writeup by NaruseJun - HackMD
  • Self Host
• Python + C拡張モジュールのExploit（TSG CTF 2020 std::vector） - h_nosonの日記
  • std::vector

Chinese

• [原创]TSG CTF 2020 Reverse-ing-『CTF对抗（原CrackMe版）』-看雪安全论坛
  • Reverse-ing

Related blogposts

• TSG CTF 2020 作問感想 - 博多電光 (Japanese)
• TSG CTF 2020 開催記 - 博多電光 (Japanese)
• 【pwn 31.0】 TSGCTF 2020 作問反省 - newbieからバイナリアンへ (Japanese)