Balsn

a CTF team from Network Security Lab of National Taiwan University

About Members Awards Contact Writeups CTFtime Twitter

Balsn

News

We are going to hold our first CTF event Balsn CTF in October 2019.

The champions will pre-qualify directly for HITCON CTF Finals in December (Onsite in Taipei, Taiwan).

The prize will be proceed in BTC or ETH.

Note that all the information above are subjected to change. Stay tuned!

If you are interested in sponsoring Balsn CTF, feel free to contact us via email!


Balsn CTF 搶旗競賽將會於 2019 十月舉行。

本場比賽的冠軍,將可直接獲得 HITCON CTF 台北決賽的資格。

獎金將會使用比特幣或以太幣的方式發送。

About

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 2019 summer, Balsn attended DEFCON 27 CTF World Final in Las Vegas as a joint team HITCON⚔BFKinesiS. The joint team consists of 5 different CTF teams from Taiwan, including HITCON, Balsn, BambooFox, DoubleSigma and KerKerYuan. We are so proud to rank in second place in such a great competition. It’s also a pleasure to collaborate with HITCON to attend this event.

Team Members

Active Memebers

how2hack
Current leader of Balsn. Give me flag (・ω・)
sasdf
Yet another Shaman King of Balsn. He focuses on all kinds of challenges.
bookgin
I enjoy playing web challenges!
- Blog: https://bookgin.tw
- Twitter: @bookgin_tw
kevin47
(。>_ŏ)▄︻̷̿┻̿═━一
sces60107
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.
qazwsxedcrfvtg14
Warning: He is a dangerous guy. Everything he touched will malfunction in a jiffy.
shw
Blog: https://x9453.github.io/
fweasd
I love CTFs, but they don’t like me…
mainly studied in pwn and crypto
RB363
Nothing to do with RB Tree
YY
A student who interested in binary analysis and like to PWN everything.
lingling
She is a reverse engineer. She reverses what she is interested in and figures out how it does what it does. (especially for Windows OS). Her interests also include Malware Research and Threat Intelligence.
Blog: 0x00.tw
Twitter: @0x000050
cli4125
A very beginner who interest in pwn and reverse engineering. Now study in NTU-EECS.
pone
pone!
hortune
struggling with solidity QQ
yuawn
Pwning my life. (๑•̀ㅂ•́)ﻭ✧
Github: yuawn
treetree
If you see a 🌲 walking on the sidewalk.
That’s me. 🙂
leon0xff
My name is Leon Off.
Kaibro
∠( ᐛ 」∠)_
Website: kaibro.tw
Blog: blog.kaibro.tw
maojui
ヽ(✿゚▽゚)ノ
Billy
Nothing … Something … Anything … Everything
NiNi
blog: blog.terrynini.tw

Honorary Members

Isaac
> “This might be a game, but it isn’t something you play.”
Blog: https://poning.me
ysc
Transfer from pwn to web. Often got a production boost at the last hour of a game.
Blog: https://ysc21.github.io
lwc
Solve the challenges ranging from pwn to crypto, from crypto to bruteforce, from butefore to guessing, from guessing to ESP…
lsc
is my waifu.
bbiiggppiigg
( The challenge I can solve ) ≡ ( The challenge which is too easy )
Xinra
> “Every challenge is brute-forceable if you believe in yourself.”
For me, 500 500 CAPTCHAs are just an hour of human work.
ymk
Welcome to the world of CTF.
laurice
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.

Selected Awards

DEFCON 27 CTF Finals, 2nd place (HITCON⚔BFKinesiS) Las Vegas, USA, Aug. 2019
DEFCON 27 CTF Qualifier, 2nd place (HITCON⚔BFKinesiS) Online, May. 2019
DEFCON 26 CTF Final, 12th place (BFS) Las Vegas, USA, Aug. 2018
HITCON CTF 2018, 3rd place (BFKinesiS) Online, Oct. 2018
0CTF/TCTF Finals, 2nd place Shanghai, China, Jun. 2019
PlaidCTF 2019, 4th place Online, Apr. 2019
Facebook CTF 2019, 2nd place Online, Jun. 2019
RCTF 2019, 3rd place Online, May. 2019
*CTF 2019, 3rd place Online, Apr. 2019
Teaser CONFidence CTF 2019, 2nd place Online, March 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

Contact

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.


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