LemonTea's blog

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2026-02-23 3.7k words 23 mins

THJCC 2026 Official WriteUp (English)

Official Write-Up for THJCC Challenges I Created TL;DR The translation is from GPT so if there is any issue just dm me thx >w< Super baby reverse First, check the file type with file: 123alvin@suiseiiscute ~/Downloads> file THJCC_Super_Baby_Reverse THJCC_Super_Baby_Reverse: ELF 64-bit LS

2026-02-23 3.8k words 22 mins

THJCC 2026 offical WriteUp (中文版)

THJCC 我出的題目官方解 Super baby reverse 先 file 看看檔案類型 123alvin@suiseiiscute ~/Downloads> file THJCC_Super_Baby_Reverse THJCC_Super_Baby_Reverse: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=643efc950df55d8188e8eeac

2026-02-10 9.5k words 56 mins

LA CTF Writeup

LA CTF Writeup TL;DR 這次與 ICEDTEA 的各位拿到 LACTF 第 9 名開心以下是我有打的題目，大部分都是有依靠 AI 如果我理解有錯歡迎私我指正感謝 DC: tbk_lteaar LLM 真的好強 Reverse the-fish Solver: LemonTea sorce: 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172

2026-01-19 888 words 4 mins

金盾獎回顧

金盾獎 20 周年心得兼回顧今年很榮幸能夠進去金盾決賽感謝隊友 Viivie Robin。早上：因為跟隊友們約 8 點到會場於是我早早就到了，但某個人搭錯車所以其實完全會合大概是 9:00 的事了到了會場後我們在場外等到報道時間，並且同時也跑去找認識的人聊天，當天同時也是交大放榜，恭喜隊友 Robin 備上交大（希望我也可以上交大）進到會場，聽了規則規則如下：可以用 AI 情境題大家都會解到不能用通訊軟體開提示會扣分教學題載教學檔案也會扣分比賽：這場比賽因為可以用 AI 於是就有透過 AI 輔助我去解那我有解出 1 - 2 題 Reverse 跟協助

2025-08-18 543 words 3 mins

Sekai CTF 2025 write up

Sekai CTF 2025 write up Web My Flask App This question give us the source code: 123456789101112131415161718192021222324from flask import Flask, request, render_templateapp = Flask(__name__)@app.route('/')def hello_world(): return render_template('index.html')@app.route(&#x2

2025-08-03 503 words 1 min

AIS3 2025心得文

這是個AIS3 2025心得文我不會寫長文所以這篇應該會很短 XDD DAY 0 第0天到交大前有跟 Jackoha Grissia chilin kohiro p23 eric他們去打竹喵，打一打就一群人搭計程車到交大，然後就去報道，跟舍友認識一下。 DAY1 開始上課我蠻喜歡馬老師的課的，之後有機會來研究kernel好了然後聽完校友的分享後就下午了我也蠻喜歡NiNi的課的.w. 雖然沒找到他要簽名QwQ 晚上就開始討論專題然後就開始我的熬夜之旅了對DAY1 只睡1小時 .w. DAY2 聽了兩場我都覺得有趣的課 Web 跟 Linux kernel蠻好玩的但ke

2025-07-20 1.1k words 7 mins

DownUnder CTF 2025 Write up

DownUnder CTF 2025 Write-up Before Everything In this competition, I played with Team QnQSec. cert: Reverse zeus First, I looked at the main function: 1234567891011121314151617181920212223242526272829303132333435363738394041int __fastcall main(int argc, const char **argv, const char **envp)&#1

2025-07-08 505 words 3 mins

NHNC official write up

NHNC official writeUP b@by_r3v3rs3 difficulty 2/10 as the question we can get a web assembling file when we download it as we need do disassemble the web assembling to c we can use a tool call wabt and how to use it just do 1wasm2c b@by_r3v3rs3.wasm -o main.c and we can get a c file as seeing the

2025-07-03 6.4k words 38 mins

AIS3 2025 pre-exam WriteUp

AIS3 2025 pre-exam Before All 因為我手受傷所以不太能生腳本基本上本篇的腳本都是我告訴AI解法AI生的又或者直接丟AI 然後write up 寫的跟大便一樣請見諒 Misc welcome Flag: AIS3{Welcome_And_Enjoy_The_CTF_!} Ramen CTF 題目給了一張圖片看到桌子上的發票透過統編去查是哪家店找到地址丟到google map 得到然後去找菜單接著通靈出菜品 Flag: AIS3{樂山溫泉拉麵:蝦拉麵} AIS3 Tiny Server - Web / Misc 這題的解法根

2025-04-30 6 words 1 min

WASM 初探

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