Balsn CTF 2022

Hello everyone, We are here again! This year, Balsn CTF 2022 will feature creative and interesting challenges. We cordially invite you to join our party. Don't forget to join our CTF event!

• Date: 03 Sep. 2022, 10:00 (UTC+8) ~ 05 Sep. 2022, 10:00 (UTC+8)
• Format: 48-hour Online Jeopardy
• CTFTime: event/1697
• Official URL: balsnctf.com
• Prize:
  • 1st place: $30,000 TWD
  • 2nd place: $20,000 TWD
  • 3rd place: $10,000 TWD
  • Balsn CTF 2022 Taiwan Stars (top 3 domestic teams with more than 3 challenges solved, excluding top 3 prizes):
    • 1st place: $9,000 TWD
    • 2nd place: $5,000 TWD
    • 3rd place: $3,000 TWD
  • All the prize will be transferred in ETH.
• All of the above information is subject to change.

Congratulations to the following teams:

• Global top 3:

  • 1st place: Never Stop Exploiting
  • 2nd place: organizers
  • 3rd place: More Smoked Leet Chicken

• Balsn CTF 2022 Taiwan Stars:

  • TSJ
  • 不快樂暑假營

• Challenges

  • Web
    • 2linenodejs
    • Health Check 1
    • Health Check 2
    • my first app
  • Crypto
    • Old but gold
    • LFSR
    • vss
    • Yet another RSA with hint
  • Rev
    • ProjectO
    • Keep It Rollin'
    • Propaganda
  • Pwn
    • Asian Parents
    • Flag Market 1
    • Flag Market 3
    • Want my signature?
    • Sentinel
  • Others
    • NFT Marketplace
    • Flag Market 2
    • Cairo Reverse

Challenges

Web

2linenodejs

• Solved: 13 / 584
• Author: ginoah
• Link: https://gist.github.com/ginoah/e723a1babffae01ffa5149121776648c

Health Check 1

• Solved: 70 / 584
• Author: chiffoncake
• Link: https://github.com/ktpss95112/my-ctf-challenges/tree/main/2022-balsnctf/health-check

Health Check 2

• Solved: 32 / 584
• Author: chiffoncake
• Link: https://github.com/ktpss95112/my-ctf-challenges/tree/main/2022-balsnctf/health-check

my first app

• Solved: 263 / 584
• Author: ysc
• Link: https://gist.github.com/YSc21/b1cf72f4cc124c84f13028c1dc6f1ecd

crypto

Old but gold

• Solved: 4 / 584
• Author: kevin47
• Link: https://github.com/kevin47/CTF-writeups/tree/master/22/balsn-ctf/old_but_gold

LFSR

• Solved: 6 / 584
• Author: utaha
• Link: https://github.com/utaha1228/BalsnCTF-2022

vss

• Solved: 9 / 584
• Author: utaha
• Link: https://github.com/utaha1228/BalsnCTF-2022

Yet another RSA with hint

• Solved: 38 / 584
• Author: utaha
• Link: https://github.com/utaha1228/BalsnCTF-2022

reverse

ProjectO

• Solved: 9 / 584
• Author: terrynini38514
• Link: http://blog.terrynini.tw/en/2022-BalsnCTF-ProjectO-Write-up/

Keep It Rollin'

• Solved: 7 / 584
• Author: paulhuang
• Link: https://gist.github.com/paulhuangkm/cdd24bb7ab46186ec2cbd58414273b23

Propaganda

• Solved: 29 / 584
• Author: frank lin
• Link:

pwn

Asian Parents

• Solved: 8 / 584
• Author: paulhuang
• Link:

Flag Market 1

• Solved: 43 / 584
• Author: how2hack
• Link: https://github.com/how2hack/my-ctf-challenges/blob/master/2022/balsnctf-2022/flag_market/README_part1.md

Flag Market 3

• Solved: 0 / 584
• Author: how2hack
• Link: https://github.com/how2hack/my-ctf-challenges/blob/master/2022/balsnctf-2022/flag_market/README_part3.md

Want my signature?

• Solved: 0 / 584
• Author: kevin47
• Link: https://github.com/kevin47/CTF-writeups/tree/master/22/balsn-ctf/want_my_signature

Sentinel

• Solved: 8 / 584
• Author: jwang
• Link:

Sentinel Revenge

• Solved: 5 / 584
• Author: jwang
• Link:

Others

NFT Marketplace

• Solved: 10 / 584
• Author: ysc
• Link: https://gist.github.com/YSc21/b1cf72f4cc124c84f13028c1dc6f1ecd

Flag Market 2

• Solved: 35 / 584
• Author: how2hack
• Link: https://github.com/how2hack/my-ctf-challenges/blob/master/2022/balsnctf-2022/flag_market/README_part2.md

Cairo Reverse

• Solved: 41 / 584
• Author: ysc
• Link: https://gist.github.com/YSc21/b1cf72f4cc124c84f13028c1dc6f1ecd