This is a collection of all challenges in HKCERT CTF 2021

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Deep Learninghkcert-ctf-2021
Overview

香港網絡保安新生代奪旗挑戰賽 2021 (HKCERT CTF 2021)

This is a collection of all challenges (and writeups) in HKCERT CTF 2021

Challenges

ID Chinese name Name Score Solves Tags (Categories)
1 玩咗先至瞓 Sanity Check 50 234 #☆☆☆☆☆
2 Freedom Cipher Mode Picker 100 21 #crypto #★☆☆☆☆
4 所有遺失的東西 All Missing 150 27 #pwn #★☆☆☆☆
5 留下來的人 The Remaining One 300 4 #pwn #misc #★★★☆☆
6 今天我不想做嘢 Let's Chill 450 4 #reverse #misc #★★★★☆
7 集合吧！地球保衛隊 Sratslla SEA 450 2 #crypto #★★★★☆
10 Ophiuchus Ophiuchus 500 2 #web #★★★★★
11 無聲浪 The Wave of Us 50 152 #forensics #☆☆☆☆☆
12 深夜浪漫 1 babyURIi 200 4 #pwn #web #★★☆☆☆
15 幫緊你！幫緊你！ Flag Checker™ 250 3 #pwn #★★☆☆☆
17 最難行的路 The Hardest Path 300 9 #reverse #misc #★★★☆☆
20 開燈．熄燈 (熄燈版) Jail of Blind 300 4 #pwn #★★★☆☆
22 小諧星 A Joke Cipher 50 88 #crypto #☆☆☆☆☆
23 郵差叔叔送信純熟迅速送出 1 Jack Botnet Service 1 300 12 #forensics #★★★☆☆
24 郵差叔叔送信純熟迅速送出 2 Jack Botnet Service 2 300 8 #forensics #★★★☆☆
28 想改寫的事 To Modify the Past 50 54 #pwn #☆☆☆☆☆
29 告別式 Cool Down 200 10 #pwn #★★☆☆☆
30 世上唯一雙細胞 1 Fortune Cookie 1 250 4 #pwn #★★☆☆☆
31 世上唯一雙細胞 2 Fortune Cookie 2 350 3 #pwn #★★★☆☆
32 薛丁格的盒子 Unobserved Box 250 6 #pwn #reverse #★★☆☆☆
35 千世書 Mastermind 500 0 #pwn #★★★★★
36 逐步拾回自己 Step by Step 100 68 #reverse #misc #★☆☆☆☆
37 暈暈陀陀 1 CTF Tuning Master (Read) 150 15 #web #misc #★☆☆☆☆
38 點點心 Steamed Meatball 150 7 #misc #★☆☆☆☆
39 選擇困難 Difficult Choice 400 5 #forensics #★★★★☆
40 純孩兒 babyXSS 100 37 #web #★☆☆☆☆
41 消失的人 The Disappeared 200 51 #forensics #★★☆☆☆
43 理性與任性之間 Shuffle 50 60 #reverse #☆☆☆☆☆
44 哥本哈根的另一個我 Another VM in København 300 2 #reverse #★★★☆☆
45 一知半解 Half-truth VM 250 2 #crypto #reverse #★★☆☆☆
46 要做更壞的事 Make it worse VM 500 0 #pwn #reverse #★★★★★
49 漫漫碎 Scattered 100 16 #reverse #★☆☆☆☆
51 Old Fashioned ↑←↓↑x 250 11 #reverse #★★☆☆☆
53 無門 No Door 1 100 6 #forensics #★☆☆☆☆
54 幻象 No Door 2 200 14 #forensics #★★☆☆☆
55 塵 Positron 400 3 #crypto #pwn #reverse #web #misc #★★★★☆
56 因講了出來 Because I Said It 150 76 #web #★☆☆☆☆
57 長話短說 Key Backup Service 1 150 6 #crypto #★☆☆☆☆
58 Braceless Key Backup Service 2 350 5 #crypto #★★★☆☆
59 返鄕下耕田啦你 easyheap 250 5 #pwn #★★☆☆☆
61 倒數 babyre 450 3 #reverse #★★★★☆
62 角落生物 1 Squirrel Community 1 50 176 #web #☆☆☆☆☆
63 回到12歲 scratch-tic-tac-toe 200 86 #misc #★★☆☆☆
64 荊棘海 The Wilderness 100 39 #web #★☆☆☆☆
67 約定的夢幻島 Sign In Please, Again 500 2 #crypto #★★★★★
70 樂園 JQ Playground 200 15 #web #★★☆☆☆
72 中二病人 A Junior Mathematician 350 3 #reverse #★★★☆☆
74 時間的囚犯 Timebomb 100 16 #reverse #★☆☆☆☆
79 FreeRider Tenet: The Plagarism 350 4 #crypto #★★★☆☆
98 網絡安全隱患 Infant Browser 50 52 #pwn #web #☆☆☆☆☆
111 神奇的糊塗魔藥 Potion of Ciphermath 450 1 #crypto #misc #★★★★☆
123 差一些什麼? babyUXSS 100 7 #web #★☆☆☆☆
60944 係咁先啦 Feedback 50 169 #☆☆☆☆☆
6825524 深夜浪漫 2 Return of babyURIi 350 3 #web #★★★☆☆
24397312 角落生物 2 Squirrel Community 2 250 2 #web #★★☆☆☆
33330996 暈暈陀陀 2 CTF Tuning Master (Execute) 300 3 #web #★★★☆☆
Owner
Ah!
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