Hello everyone, We are here again! This year, Balsn CTF 2023 will feature creative and interesting challenges. We cordially invite you to join our party. Don’t forget to join our CTF event! 07 十月 2023, 02:00 UTC — 星期一, 09 十月 2023, 02:00 UTC
- Date: 07 Oct. 2023, 10:00 (UTC+8) ~ 09 Oct. 2023, 10:00 (UTC+8)
- Format: 48-hour Online Jeopardy
- CTFTime: event/2056
- Official URL: Wait and see!
- Exciting News:
- The first place of Balsn CTF 2023 will get the qualification in the HITCON CTF 2023 final!.
Balsn CTF 資安搶旗賽又來啦！ 今年我們會舉辦 Balsn CTF 2023，依然會有許多充滿創意以及有趣的題目，誠摯歡迎各位一起來參加比賽！請大家記得在行事曆上空出日子，來參與這個盛大的宴會吧！
- 日期: 10/07 (六) 早上 10:00 ~ 10/09 (一) 早上 10:00 (UTC+8, 台北時間)
- 形式: 48 小時的線上解題 (jeopardy) 形式
- CTFTime: event/2056
- 註冊網址: Wait and see!
- Balsn CTF 2023 的第一名將獲得參加 HITCON CTF 2023 決賽的資格
Balsn is CTF team from Taiwan founded in 2016. Most of our current members are affiliated with Network Security Lab in National Taiwan University. We actively participate in online and onsite CTF competitions. You can browse our recently participated events and rankings on CTFtime. We also publish writeups on CTF challenges.
We are a group of cybersecurity enthusiasts interested in various areas including software security, binary analysis, web security, cryptography, IoT security, and etc. Besides our own research, all of us enjoy playing CTF because we believe it is an excellent chance to hone our skills in practice, catch up with the latest trend, and most importantly – compete and have fun!
In 2020 summer, Balsn attended DEFCON 28 CTF World Final online as a joint team HITCON⚔Balsn, collaborating with HITCON. We ranked in third place in this great competition.
Current leader of Balsn. (๑•ᴗ•)⊃━*✩⁺˚🕸
Pwning my life. (๑•̀ㅂ•́)ﻭ✧
Give me flag (・ω・)
Yet another Shaman King of Balsn. He focuses on all kinds of challenges.
I enjoy playing web challenges!
- Blog: https://bookgin.tw
- Twitter: @bookgin_tw
sces60107 (a.k.a Shaman King) knows nothing about reverse engineering and binary exploit, but he knows how to get the flag. This guy specializes in mind-reading and guessing the flag.
Warning: He is a dangerous guy. Everything he touched will malfunction in a jiffy.
I love CTFs, but they don’t like me…
mainly studied in pwn and crypto
Nothing to do with RB Tree
struggling with solidity QQ
∠( ᐛ 」∠)＿
Nothing … Something … Anything … Everything
I’m a huge fan of sasdf!
github: Frank Lin
Play crypto but am learning pwn OwO
Crypto ε≡ﾍ( ´∀`)ﾉ Pwn
A newbie who knows a little RE (a.k.a. Reverse Elephant).
I love misc!
pwn newbie who is finding crystal ball.
cats are more adorable than flags even in
Just call me namo !
professional trash code generator
Fugi is as cute as a cat.
A professional bug maker.
Have a happy day!
> “This might be a game, but it isn’t something you play.”
Transfer from pwn to web. Often got a production boost at the last hour of a game.
Solve the challenges ranging from pwn to crypto, from crypto to bruteforce, from butefore to guessing, from guessing to ESP…
is my waifu.
( The challenge I can solve ) ≡ ( The challenge which is too easy )
> “Every challenge is brute-forceable if you believe in yourself.”
For me, 500 500 CAPTCHAs are just an hour of human work.
Welcome to the world of CTF.
A girl studies in computer science and interested in classical music.
She has absolute pitch and used the ability to decode music in D-CTF final. She is now focusing on the area of machine learning.
A student who interested in binary analysis and like to PWN everything.
BalsnCTF System Guardian. (OwO)^
Lead System Architect of BalsnCTF (2019, 2020)
|DEFCON 28 CTF Finals, 3rd place (HITCON⚔Balsn)||Online, Aug. 2020|
|DEFCON 27 CTF Finals, 2nd place (HITCON⚔BFKinesiS)||Las Vegas, USA, Aug. 2019|
|DEFCON 26 CTF Finals, 12th place (BFS)||Las Vegas, USA, Aug. 2018|
|HITCON CTF 2021, 2nd place||Online, Dec. 2021|
|Dragon CTF 2021, 1st place||Online, Nov. 2021|
|0CTF/TCTF 2021 Finals, 3rd place||Online, Sep. 2021|
|PlaidCTF 2021, 4th place||Online, Apr. 2021|
|WCTF 2020, 1st place||Online, Nov. 2020|
|0CTF/TCTF 2020 Finals, 2nd place||Online, Sep. 2020|
|Codegate CTF 2020 Finals, 3rd place||Online, Sep. 2020|
|0CTF/TCTF 2019 Finals, 2nd place||Shanghai, China, Jun. 2019|
|HITCON CTF 2018, 3rd place (BFKinesiS)||Online, Oct. 2018|
|Trend Micro CTF 2019 Finals, 3rd place||Tokyo, Japan, Nov. 2019|
|Pwn2Win CTF 2019, 2nd place||Online, Nov. 2019|
|TokyoWesterns CTF 5th 2019, 1st place||Online, Sep. 2019|
|Facebook CTF 2019, 2nd place||Online, Jun. 2019|
|PlaidCTF 2019, 4th place||Online, Apr. 2019|
|Teaser Dragon CTF 2019, 3rd place||Online, Sep. 2019|
|N1CTF 2019, 2nd place||Online, Sep. 2019|
|RCTF 2019, 3rd place||Online, May. 2019|
|*CTF 2019, 3rd place||Online, Apr. 2019|
|Teaser CONFidence CTF 2019, 2nd place||Online, Mar. 2019|
|Codegate CTF 2019 Final, 6th place||Seoul, Korea, Mar. 2019|
|HITB-XCTF GSEC CTF 2018 Finals, 5th place||Singapore City, Singapore, Sep. 2018|
|Pwn2Win CTF 2018, 1st place||Online, Nov. 2018|
|Hackover CTF 2018, 2nd place||Online, Oct. 2018|
|ASIS CTF Finals 2018, 5th place||Online, Nov. 2018|
|DefCamp CTF Finals||Bucharest, Romania, Nov. 2018|
|DefCamp CTF Finals||Bucharest, Romania, Nov. 2017|
|Trend Micro CTF 2018 Finals||Tokyo, Japan, Dec. 2018|
|SECCON 2018 Finals||Tokyo, Japan, Dec. 2018|
|SECCON 2017 Finals (1$@AIS3, Balsn)||Tokyo, Japan, Feb. 2018|
Please contact us at balsn2015 [at] gmail [dot] com. You can write the mail in Chinese, English or Taiwanese.
If you have any question regarding our writeups, please feel free to create an issue in the writeup repository.