| ID | Title | Author | Categories | Stars | Points | Solves |
|---|---|---|---|---|---|---|
| 00 | 差一些什麼? / babyUXSS | ozetta | Web | ★☆☆☆☆ | 100 | 7/234 |
| 01 | 神奇的糊塗魔藥 / Potion of Ciphermath | mystiz | Misc, Crypto | ★★★★☆ | 450 | 1/234 |
| 02 | Freedom / Cipher Mode Picker | mystiz | Crypto | ★☆☆☆☆ | 100 | 21/234 |
| 04 | 所有遺失的東西 / All Missing | cire_meat_pop | Pwn | ★☆☆☆☆ | 150 | 27/234 |
| 05 | 留下來的人 / The Remaining One | cire_meat_pop | Misc, Pwn | ★★★☆☆ | 300 | 4/234 |
| 06 | 今天我不想做嘢 / Let's Chill | mystiz | Reverse | ★★★★☆ | 450 | 4/234 |
| 07 | 集合吧！地球保衛隊 / Sratslla SEA | mystiz | Crypto | ★★★★☆ | 450 | 2/234 |
| 10 | Ophiuchus | ozetta | Web | ★★★★★ | 500 | 2/234 |
| 11 | 無聲浪 / The Wave of Us | byronwai | Forensics | ☆☆☆☆☆ | 50 | 152/234 |
| 12 | 深夜浪漫 1 / babyURIi | ozetta | Web, Pwn | ★★☆☆☆ | 200 | 4/234 |
| 12b | 深夜浪漫 2 / Return of babyURIi | ozetta | Web | ★★★☆☆ | 350 | 3/234 |
| 15 | 幫緊你！幫緊你！ / Flag Checker™ | mystiz | Pwn | ★★☆☆☆ | 250 | 3/234 |
| 17 | 最難行的路 / The Hardest Path | mystiz | Reverse, Misc | ★★★☆☆ | 300 | 9/234 |
| 20 | 開燈．熄燈 (熄燈版) / Jail of Blind | cire_meat_pop | Pwn | ★★★☆☆ | 300 | 4/234 |
| 22 | 小諧星 / A Joke Cipher | mystiz | Crypto | ☆☆☆☆☆ | 50 | 88/234 |
| 23 | 郵差叔叔送信純熟迅速送出 1 / Jack Botnet Service 1 | eriri | Forensics | ★★★☆☆ | 300 | 12/234 |
| 24 | 郵差叔叔送信純熟迅速送出 2 / Jack Botnet Service 2 | eriri | Forensics | ★☆☆☆☆ | 150 | 8/234 |
| 28 | 想改寫的事 / To Modify the Past | cire_meat_pop | Pwn | ☆☆☆☆☆ | 50 | 54/234 |
| 29 | 告別式 / Cool Down | cire_meat_pop | Pwn | ★★☆☆☆ | 200 | 10/234 |
| 30 | 世上唯一雙細胞 1 / Fortune Cookie 1 | cire_meat_pop | Pwn | ★★☆☆☆ | 250 | 4/234 |
| 31 | 世上唯一雙細胞 2 / Fortune Cookie 2 | cire_meat_pop | Pwn | ★★★☆☆ | 350 | 3/234 |
| 32 | 薛丁格的盒子 / Unobserved Box | cire_meat_pop | Pwn, Reverse | ★★☆☆☆ | 250 | 6/234 |
| 35 | 千世書 / Mastermind | cire_meat_pop | Pwn | ★★★★★ | 500 | 0/234 |
| 36 | 逐步拾回自己 / Step by Step | cire_meat_pop | Reverse, Misc | ★☆☆☆☆ | 100 | 68/234 |
| 37 | 暈暈陀陀 1 / CTF Tuning Master (Read) | ozetta | Web, Misc | ★☆☆☆☆ | 150 | 15/234 |
| 37b | 暈暈陀陀 2 / CTF Tuning Master (Execute) | ozetta | Web | ★★★☆☆ | 300 | 3/234 |
| 38 | 點點心 / Steamed Meatball | ozetta | Misc | ★☆☆☆☆ | 150 | 7/234 |
| 39 | 選擇困難 / Difficult Choice | byronwai | Forensics | ★★★★☆ | 400 | 5/234 |
| 40 | 純孩兒 / babyXSS | ozetta | Web | ★☆☆☆☆ | 100 | 37/234 |
| 41 | 消失的人 / The Disappeared | byronwai | Forensics | ★★☆☆☆ | 200 | 51/234 |
| 43 | 理性與任性之間 / Shuffle | harrier | Reverse | ☆☆☆☆☆ | 50 | 60/234 |
| 44 | 哥本哈根的另一個我 / Another VM in København | harrier | Reverse | ★★★☆☆ | 300 | 2/234 |
| 45 | 一知半解 / Half-truth VM | harrier | Reverse | ★★☆☆☆ | 250 | 2/234 |
| 46 | 要做更壞的事 / Make it worse VM | harrier | Reverse | ★★★★★ | 500 | 0/234 |
| 49 | 漫漫碎 / Scattered | harrier | Reverse | ★☆☆☆☆ | 100 | 16/234 |
| 51 | Old Fashioned / ↑←↓↑x | harrier | Reverse | ★★☆☆☆ | 250 | 11/234 |
| 53 | 無門 / Doorless 1 | byronwai | Forensics | ★☆☆☆☆ | 100 | 6/234 |
| 54 | 幻象 / No Door 2 | byronwai | Forensics | ★★☆☆☆ | 200 | 14/234 |
| 55 | 塵 / Positron | ozetta | Web, Pwn, Browser, Misc, Reverse, Crypto | ★★★★☆ | 400 | 3/234 |
| 56 | 因講了出來 / Because I Said It | byronwai | Web | ★☆☆☆☆ | 150 | 76/234 |
| 57 | 長話短說 / Key Backup Service 1 | mystiz | Crypto | ★☆☆☆☆ | 150 | 6/234 |
| 58 | Braceless / Key Backup Service 2 | mystiz | Crypto | ★★★☆☆ | 350 | 5/234 |
| 59 | 返鄕下耕田啦你 / easyheap | ken | Pwn | ★★☆☆☆ | 250 | 5/234 |
| 61 | 倒數 / babyre | ken | Reverse | ★★★★☆ | 450 | 3/234 |
| 62 | 角落生物 1 / Squirrel Community 1 | apple | Web | ☆☆☆☆☆ | 50 | 176/234 |
| 62b | 角落生物 2 / Squirrel Community 2 | apple | Web | ★★☆☆☆ | 250 | 2/234 |
| 63 | 回到12歲 / scratch-tic-tac-toe | apple | Misc | ★★☆☆☆ | 200 | 86/234 |
| 64 | 荊棘海 / The Wilderness | mystiz | Web | ★☆☆☆☆ | 100 | 39/234 |
| 67 | 約定的夢幻島 / Sign In Please, Again | mystiz | Crypto | ★★★★★ | 500 | 2/234 |
| 70 | 樂園 / JQ Playground | apple | Web | ★★☆☆☆ | 200 | 15/234 |
| 72 | 中二病人 / A Junior Mathematician | mystiz | Reverse | ★★★☆☆ | 350 | 3/234 |
| 74 | 時間的囚犯 / Timebomb | darkfloyd | Reverse | ★☆☆☆☆ | 100 | 16/234 |
| 79 | FreeRider / Tenet: The Plagarism | mystiz | Crypto | ★★★☆☆ | 350 | 4/234 |
| 98 | 網絡安全隱患 / Infant Browser | ozetta | Web, Pwn, Browser, 手把手教你玩 | ☆☆☆☆☆ | 50 | 52/234 |
| s1 | 玩咗先至瞓 / Sanity Check | ? | ☆☆☆☆☆ | 50 | 234/234 | |
| s2 | 係咁先啦 / Feedback | ? | ☆☆☆☆☆ | 50 | 169/234 |
| ID | Title | Author | Categories |
|---|---|---|---|
| T1 | Infant XSS | Ozetta | Web, 手把手教你玩 |
| T2 | Simple Sign On | Mystiz | Crypto |
| T3 | Jail of Seccomp | cire_meat_pop | Pwn |
| T4 | Python calculator | cire_meat_pop | Pwn |
| T5 | Mr. Robot - Rootkit | Darkfloyd | Reverse |
This repo contains all challenges from HKCERT CTF 2021, including those are not by Black Bauhinia.
Thank you to HKCERT and all challengers for publicizing challenges in this repository!
└── id-challengename/
├── env/ a dockerized environment that is accessible via `nc` or browsers
│ ├── docker-compose.yml
│ ├── image1/
│ │ ├── Dockerfile
│ │ └── ...
│ └── image2/
│ ├── Dockerfile
│ └── ...
├── src/ whatever files that is used as auxiliary to the challenge, in whatever
│ use. this includes but not limited to the source code for the binary,
│ the solution script (or writeup) that is considered to solve the
│ challenge.
├── writeups/
│ ├── team1/
│ │ └── README.md the writeup and any auxiliary script that you used to solve a
│ └── team2/ challenge - one folder per team (feel free to include the link to your
│ ├── README.md writeup, too).
│ └── solve.py
└── README.md the README file that contains a brief summary (title, description,
category, author and flag) of the challenge