Fri, 10 Nov. 2023, 10:00 UTC — Sun, 12 Nov. 2023, 10:00 UTC 
On-site
A HKCERT CTF event.
Format: Jeopardy 
Official URL: https://ctf.hkcert.org/
This event's future weight is subject of public voting!
Event organizers
(This is an online competition, NOT an onsite event)
This is the 4th year we organise this CTF competition. The objective is to arouse the cyber security skills and awareness of the industry and students. And encourage participants’ problem solving with teamwork, creative thinking and cyber security skills via a fun game.
Overseas Category Registration URL: https://alt.jotfor.ms/hkcert/ctf2023-overseas
A. Hong Kong Category
1. Secondary School
> Gold: SAMSUNG Galaxy Tab S6 Lite 10.4″ (2022 Edition) Tablet (LTE + WiFi)
> Silver: APPLE Watch SE GPS + Cellular Aluminium Case (2022) – 40mm
> Bronze: Nothing ear (2) Headphone
2. Tertiary Institution
> Gold: Bowers & Wilkins PI7 S2 Headphone
> Silver: MICROSOFT Xbox Series S Game Console (1TB)
> Bronze: SONY REON POCKET 4 Wearable Thermal Device (Main Unit with neckband)
3. Open Group
Gold: SONY PlayStation® 5 PS5 Digital Edition CFI-1218B01 Game Console
Silver: Insta360 Go 3 Action camera (32GB)
Bronze: Rakuten Kobo Sage eReader
-----------------------------------
B. Overseas Category
Gold: US$1,300 Amazon eGift Cards (~HK$10,000) (for whole team)
Silver: US$1,100 Amazon eGift Cards (~HK$8,000) (for whole team)
Bronze: US$800 Amazon eGift Cards (~HK$6,000) (for whole team)
311 teams total
| Place | Team | CTF points | Rating points | |
|---|---|---|---|---|
| 1 | Project Sekai | 11409.000 | 110.000 | |
| 2 | Tower of Hanoi | 11359.000 | 82.259 | |
| 3 | about:blankets | 10459.000 | 68.754 | |
| 4 | Black Bacon | 9459.000 | 59.350 | |
| 5 | thehackerscrew | 9309.000 | 55.876 | |
| 6 | kalmarunionen | 9109.000 | 53.079 | |
| 7 | O0034 - Mystiz's Fan Club | 8909.000 | 50.805 | |
| 8 | HKUSTFirebird | 7589.000 | 43.460 | |
| 9 | NuttyShell | 6559.000 | 37.730 | |
| 10 | O0123 - NuttyShell Purple | 6359.000 | 36.155 | |
| 11 | AUTOEXEC.BAT | 6289.000 | 35.318 | |
| 12 | Tuning Machine | 5220.000 | 29.748 | |
| 13 | O0006 - flag{i_forgor} | 4970.000 | 28.190 | |
| 14 | T0093 - NuttyShell Blue | 4889.000 | 27.497 | |
| 15 | EzAntiPwn | 4839.000 | 26.994 | |
| 16 | r3kapig | 4639.000 | 25.801 | |
| 17 | T0063 - FirebUwU | 4539.000 | 25.117 | |
| 18 | T0060 - Athena | 4270.000 | 23.640 | |
| 19 | O0065 - HackOverflow | 4120.000 | 22.756 | |
| 20 | Lorem Ipsec | 3770.000 | 20.924 | |
| 21 | T0074 - Hercules | 3639.000 | 20.162 | |
| 22 | T0012 - Deferenced Void Pointer | 3620.000 | 19.951 | |
| 23 | IUT GENESIS | 3570.000 | 19.601 | |
| 24 | T0092 - NuttyShell Red | 3509.000 | 19.208 | |
| 25 | Win or Mushroom | 3470.000 | 18.928 | |
| 26 | DTUHAX | 3470.000 | 18.843 | |
| 27 | Google fanboys | 3370.000 | 18.283 | |
| 28 | squ1rrel | 3370.000 | 18.210 | |
| 29 | Medium Brain | 3170.000 | 17.178 | |
| 30 | Up_0n3_D0wn_7w0 | 3140.000 | 16.971 | |
| 31 | Dragon Sector | 3060.000 | 16.526 | |
| 32 | O0052 - Error Sheet | 3020.000 | 16.277 | |
| 33 | zeski | 3010.000 | 16.177 | |
| 34 | O0102 - 2boysOnePwn | 2970.000 | 15.935 | |
| 35 | T0076 - Turkey :) | 2920.000 | 15.648 | |
| 36 | T0034 - The Birds | 2920.000 | 15.604 | |
| 37 | IDKIDK | 2920.000 | 15.563 | |
| 38 | O0014 - N0t1me2wast3 | 2810.000 | 14.994 | |
| 39 | O0073 - Capybara | 2770.000 | 14.764 | |
| 40 | O0085 - pppp-poop | 2770.000 | 14.728 | |
| 41 | O0139 - Apollo | 2770.000 | 14.695 | |
| 42 | Blue Hens | 2670.000 | 14.181 | |
| 43 | asmhole | 2640.000 | 14.006 | |
| 44 | T0044 - CUHK | 2570.000 | 13.639 | |
| 45 | O0035 - HKVTBER@MYA🐼_SAI3_JAT1 | 2420.000 | 12.888 | |
| 46 | Ireland without the RE | 2370.000 | 12.621 | |
| 47 | O0056 - TheBeginners | 2320.000 | 12.354 | |
| 48 | O0042 - Edgerunners | 2270.000 | 12.089 | |
| 49 | O0143 - Helios | 2220.000 | 11.825 | |
| 50 | O0094 - Resting Big Face | 2170.000 | 11.561 | |
| 51 | Volcano | 2170.000 | 11.539 | |
| 52 | O0075 - TionKH | 2089.000 | 11.128 | |
| 53 | O0106 - Ph0ny | 2039.000 | 10.867 | |
| 54 | siunam | 2020.000 | 10.756 | |
| 55 | T0057 - CUHK0X | 2020.000 | 10.738 | |
| 56 | Nol3ptr | 1960.000 | 10.431 | |
| 57 | /watch?v=OZmZfb67vGQ | 1950.000 | 10.365 | |
| 58 | T0027 - HKCC | 1920.000 | 10.204 | |
| 59 | O0063 - #ffff00 | 1920.000 | 10.188 | |
| 60 | O0044 - DTT48 | 1910.000 | 10.124 | |
| 61 | O0119 - PAW | 1870.000 | 9.916 | |
| 62 | bobby | 1860.000 | 9.854 | |
| 63 | O0096 - Echo | 1839.000 | 9.738 | |
| 64 | T0097 - CUHK | 1770.000 | 9.392 | |
| 65 | T0079 - CUHK | 1720.000 | 9.138 | |
| 66 | O0172 - Waterbird | 1710.000 | 9.077 | |
| 67 | O0111 - SYOI Old Seafood | 1610.000 | 8.582 | |
| 68 | O0122 - Dead Memes United | 1570.000 | 8.377 | |
| 69 | O0128 - O0421 - CTFONEEE | 1560.000 | 8.317 | |
| 70 | O0049 - FireDude | 1510.000 | 8.065 | |
| 71 | phis1Ng_ | 1510.000 | 8.054 | |
| 72 | O0038 - Small Potatoes | 1470.000 | 7.850 | |
| 73 | O0092 - Micro view | 1420.000 | 7.599 | |
| 74 | Hacker Ameer | 1420.000 | 7.589 | |
| 75 | O0051 - CTFetchers | 1420.000 | 7.579 | |
| 76 | krauq | 1370.000 | 7.328 | |
| 77 | XpNewNew | 1360.000 | 7.271 | |
| 78 | Maultaschen | 1320.000 | 7.069 | |
| 79 | The Hack Attack | 1320.000 | 7.060 | |
| 80 | O0050 - O0033-SDND | 1220.000 | 6.569 | |
| 81 | O0019 - Cγ6er_HaCkεr | 1220.000 | 6.560 | |
| 82 | atleastwetried | 1220.000 | 6.552 | |
| 83 | O0161 - E | 1170.000 | 6.303 | |
| 84 | T0007 - HKCC | 1170.000 | 6.295 | |
| 85 | T0038 - BITBYBIT | 1170.000 | 6.287 | |
| 86 | T0014 - IDK | 1170.000 | 6.280 | |
| 87 | Vader | 1160.000 | 6.224 | |
| 88 | O0160 - BIIC | 1120.000 | 6.024 | |
| 89 | T0105 - HKCT | 1120.000 | 6.017 | |
| 90 | O0031 - CSA Team | 1120.000 | 6.010 | |
| 91 | O0171 - Ball Pen Testers | 1070.000 | 5.763 | |
| 92 | T0045 - RnJlZSBSaWRlcg== | 1070.000 | 5.756 | |
| 93 | m00nl1ght_5h4d0w | 1060.000 | 5.701 | |
| 94 | O0084 - Anti-JavaScript Aktion | 1060.000 | 5.695 | |
| 95 | T0058 - HKUST, PolyU | 1060.000 | 5.689 | |
| 96 | T0026 - pokfulam | 1010.000 | 5.442 | |
| 97 | clownsime | 970.000 | 5.243 | |
| 98 | T0031 - NULLPO | 970.000 | 5.237 | |
| 99 | Hungary23 | 960.000 | 5.183 | |
| 100 | pastabase64 | 920.000 | 4.985 | |
| 101 | - The Masterpiece | 920.000 | 4.980 | |
| 102 | O0026 - CSA TEAM | 920.000 | 4.974 | |
| 103 | O0059 - non-trained.team | 920.000 | 4.969 | |
| 104 | O0131 - Artemis | 910.000 | 4.916 | |
| 105 | O0028 - N2F0CU5 Production Team | 910.000 | 4.911 | |
| 106 | Nooo Name | 870.000 | 4.713 | |
| 107 | T0096 - HKUST, CUHK | 870.000 | 4.708 | |
| 108 | O0030 - CSA Team | 870.000 | 4.703 | |
| 109 | O0154 - TeamMGo | 820.000 | 4.458 | |
| 110 | O0147 - Cyber Voltex | 770.000 | 4.212 | |
| 111 | MOCTF | 770.000 | 4.207 | |
| 112 | T0100 - admin'-- | 770.000 | 4.203 | |
| 113 | empty | 760.000 | 4.150 | |
| 114 | O0069 - Code@Niter | 760.000 | 4.146 | |
| 115 | Woy Ag | 760.000 | 4.142 | |
| 116 | jjjjjj | 750.000 | 4.090 | |
| 117 | O0116 - null null pig | 720.000 | 3.941 | |
| 118 | O0156 - PTME | 720.000 | 3.937 | |
| 119 | T0083 - CTF2 | 720.000 | 3.933 | |
| 120 | O0120 - Dont6589 | 720.000 | 3.929 | |
| 121 | T0110 - HKMU | 720.000 | 3.925 | |
| 122 | T0055 - THEi | 720.000 | 3.922 | |
| 123 | Thien-Phuc Tran | 710.000 | 3.870 | |
| 124 | O0124 - buddiesss | 710.000 | 3.866 | |
| 125 | samson | 700.000 | 3.815 | |
| 126 | T0111 - HKCT | 670.000 | 3.666 | |
| 127 | T0016 - HKCC | 670.000 | 3.663 | |
| 128 | O0136 - St. Paul's True Light | 670.000 | 3.660 | |
| 129 | O0148 - Cyberlax | 670.000 | 3.656 | |
| 130 | Kalangkabok | 670.000 | 3.653 | |
| 131 | Palmas | 670.000 | 3.650 | |
| 132 | T0109 - Byte Hogs | 670.000 | 3.647 | |
| 133 | O0057 - Unnamed 0 | 670.000 | 3.643 | |
| 134 | Elite.sa | 660.000 | 3.592 | |
| 135 | T0056 - CUHK | 660.000 | 3.589 | |
| 136 | O0060 - Roasted Bird | 620.000 | 3.393 | |
| 137 | T0051 - IVE | 620.000 | 3.390 | |
| 138 | O0115 - HKMU BOYS YOUNG | 620.000 | 3.387 | |
| 139 | O0155 - Cyber Forensics | 610.000 | 3.336 | |
| 140 | O0110 - HKUS3Lab | 600.000 | 3.285 | |
| 141 | T0103 - Casual Player | 570.000 | 3.138 | |
| 142 | Phaethon | 570.000 | 3.135 | |
| 143 | T0077 - CUHK | 570.000 | 3.132 | |
| 144 | DrunkenCloud | 570.000 | 3.130 | |
| 145 | sybvious | 560.000 | 3.079 | |
| 146 | O0101 - deadbeef | 560.000 | 3.076 | |
| 147 | O0080 - Mocking3ric | 550.000 | 3.026 | |
| 148 | T0040 - CJH | 520.000 | 2.878 | |
| 149 | hoshiyomi | 520.000 | 2.876 | |
| 150 | O0107 - duck duck tour | 520.000 | 2.873 | |
| 151 | O0142 - Light | 520.000 | 2.871 | |
| 152 | T0086 - RedFlags | 520.000 | 2.869 | |
| 153 | T0112 - CPUer.io | 520.000 | 2.866 | |
| 154 | T0053 - CUHK | 510.000 | 2.816 | |
| 155 | teru | 500.000 | 2.765 | |
| 156 | test | 460.000 | 2.570 | |
| 157 | O0041 - Drater | 460.000 | 2.568 | |
| 158 | T0028 - T010101-HKUSPACE | 460.000 | 2.566 | |
| 159 | 3HKer | 420.000 | 2.371 | |
| 160 | T0078 - HKMU | 420.000 | 2.368 | |
| 161 | O0167 - Hex CY | 420.000 | 2.366 | |
| 162 | T0029 - HKCC | 420.000 | 2.364 | |
| 163 | O0150 - kira | 420.000 | 2.362 | |
| 164 | T0104 - MajesticFire | 420.000 | 2.360 | |
| 165 | T0009 - Jammy | 410.000 | 2.310 | |
| 166 | O0082 - Humble Anonymous | 410.000 | 2.308 | |
| 167 | T0033 - HKU | 410.000 | 2.306 | |
| 168 | T0095 - PolyU | 410.000 | 2.304 | |
| 169 | Sirawit Loywirat | 410.000 | 2.302 | |
| 170 | T0023 - CUHK | 410.000 | 2.300 | |
| 171 | O0021 - deadbeef | 410.000 | 2.298 | |
| 172 | 0xNox | 410.000 | 2.296 | |
| 173 | Groot | 410.000 | 2.294 | |
| 174 | T0015 - HKU | 410.000 | 2.293 | |
| 175 | Ted Tan | 410.000 | 2.291 | |
| 176 | O0005 - Gaki | 400.000 | 2.241 | |
| 177 | Hax1on | 400.000 | 2.239 | |
| 178 | T0102 - Hollow Purple | 370.000 | 2.093 | |
| 179 | O0011 - Open Team 666 II | 370.000 | 2.091 | |
| 180 | O0032 - NoName | 370.000 | 2.089 | |
| 181 | InfoSecIITR | 370.000 | 2.088 | |
| 182 | 敌敌畏 | 360.000 | 2.038 | |
| 183 | w4it1ng_f0r_m3 | 360.000 | 2.036 | |
| 184 | T0020 - CUHK | 360.000 | 2.034 | |
| 185 | 云明昭曦 | 360.000 | 2.033 | |
| 186 | T0054 - THEi | 360.000 | 2.031 | |
| 187 | O0103 - BigSpice | 360.000 | 2.030 | |
| 188 | Epic Leet Team | 360.000 | 2.028 | |
| 189 | daffainfo | 360.000 | 2.026 | |
| 190 | Flaggermeister | 360.000 | 2.025 | |
| 191 | FR33_T34M_Z | 350.000 | 1.975 | |
| 192 | O0072 - L1v3rp00r | 320.000 | 1.829 | |
| 193 | O0138 - Hahahaha | 320.000 | 1.828 | |
| 194 | HACKuna Matata | 300.000 | 1.730 | |
| 195 | O0108 - SRisFun | 300.000 | 1.728 | |
| 196 | T0006 - HKSYU | 270.000 | 1.582 | |
| 197 | O0151 - Rindo | 270.000 | 1.581 | |
| 198 | O0126 - Newbie | 270.000 | 1.579 | |
| 199 | O0015 - 7ryN0770F41l | 260.000 | 1.530 | |
| 200 | SaS | 260.000 | 1.528 | |
| 201 | ItsBengsky | 250.000 | 1.479 | |
| 202 | fakes | 250.000 | 1.477 | |
| 203 | Will | 250.000 | 1.476 | |
| 204 | lazerwild | 220.000 | 1.330 | |
| 205 | Thai | 220.000 | 1.329 | |
| 206 | O0058 - March Lam | 220.000 | 1.328 | |
| 207 | T0022 - Cannon fodder | 220.000 | 1.326 | |
| 208 | O0145 - S9D | 220.000 | 1.325 | |
| 209 | S0015 - 香海正覺蓮社佛教正覺中學 | 220.000 | 1.324 | |
| 210 | ClownCS | 210.000 | 1.274 | |
| 211 | GvvHT | 210.000 | 1.273 | |
| 212 | O0105 - Bully_of_TKKC | 210.000 | 1.272 | |
| 213 | lintianwin | 210.000 | 1.271 | |
| 214 | m0hd1d | 210.000 | 1.269 | |
| 215 | Im not late ty | 210.000 | 1.268 | |
| 216 | Spirit | 210.000 | 1.267 | |
| 217 | Falcon | 210.000 | 1.266 | |
| 218 | Yass | 210.000 | 1.265 | |
| 219 | gugubird | 210.000 | 1.264 | |
| 220 | O0114 - ( •_•)>⌐■-■ | 210.000 | 1.262 | |
| 221 | t1ct4ct0e | 210.000 | 1.261 | |
| 222 | 何普西 | 210.000 | 1.260 | |
| 223 | T0024 - IVE (SHA TIN) | 200.000 | 1.211 | |
| 224 | O0087 - Apex CTF | 200.000 | 1.210 | |
| 225 | O0132 - Stellar | 200.000 | 1.209 | |
| 226 | O0022 - The Newbie | 170.000 | 1.063 | |
| 227 | fyr3p4w | 170.000 | 1.062 | |
| 228 | PL314D3S | 170.000 | 1.061 | |
| 229 | Danil | 160.000 | 1.011 | |
| 230 | O0097 - CUP NOODLE | 160.000 | 1.010 | |
| 231 | tony | 160.000 | 1.009 | |
| 232 | AquaticAssault | 160.000 | 1.008 | |
| 233 | shimmer | 160.000 | 1.007 | |
| 234 | lizard | 160.000 | 1.006 | |
| 235 | Peter Rosenblum | 160.000 | 1.005 | |
| 236 | LLHZ | 160.000 | 1.004 | |
| 237 | Aditya | 160.000 | 1.003 | |
| 238 | T0101 - HKUST | 150.000 | 0.954 | |
| 239 | kanon | 150.000 | 0.953 | |
| 240 | O0137 - ironicbond | 150.000 | 0.952 | |
| 241 | EggRoll | 150.000 | 0.951 | |
| 242 | O0098 - 58632CFC8770BC86D9F999E23251452F9DED737A | 150.000 | 0.950 | |
| 243 | Amine | 150.000 | 0.949 | |
| 244 | T0039 - PolyU | 150.000 | 0.949 | |
| 245 | T0059 - CityU | 150.000 | 0.948 | |
| 246 | tzanany | 100.000 | 0.706 | |
| 247 | once | 100.000 | 0.705 | |
| 248 | ph0ebus | 100.000 | 0.704 | |
| 249 | O0095 - Alma | 70.000 | 0.558 | |
| 250 | Leafy | 70.000 | 0.557 | |
| 251 | Pincher | 60.000 | 0.508 | |
| 252 | Kali Billi | 60.000 | 0.507 | |
| 253 | S0096 - IHMC | 60.000 | 0.507 | |
| 254 | 0xbule | 60.000 | 0.506 | |
| 255 | O0083 - PuErTea | 60.000 | 0.505 | |
| 256 | T0072 - HKUST | 60.000 | 0.504 | |
| 257 | RKIC | 60.000 | 0.503 | |
| 258 | O0152 - sf | 60.000 | 0.502 | |
| 259 | pwnfish | 60.000 | 0.502 | |
| 260 | Add | 60.000 | 0.501 | |
| 261 | O0133 - Gu0H4cker | 60.000 | 0.500 | |
| 262 | Sushant singh | 50.000 | 0.451 | |
| 263 | jose | 50.000 | 0.450 | |
| 264 | mohammed touheed patel | 50.000 | 0.449 | |
| 265 | SBM | 50.000 | 0.449 | |
| 266 | O0164 - Team CEE1 | 50.000 | 0.448 | |
| 267 | T0106 - *9527* | 20.000 | 0.302 | |
| 268 | T0094 - YC (Tseung Kwan O) | 20.000 | 0.302 | |
| 269 | O0129 - WWC | 20.000 | 0.301 | |
| 270 | O0079 - LEE HO WAI | 20.000 | 0.300 | |
| 271 | O0020 - ttttut | 20.000 | 0.299 | |
| 272 | O0100 - fzhshzh | 20.000 | 0.299 | |
| 273 | The_advantage_is_in_me | 10.000 | 0.250 | |
| 274 | BTSLGK | 10.000 | 0.249 | |
| 275 | T0065 - HKU | 10.000 | 0.248 | |
| 276 | LFY looking for you | 10.000 | 0.247 | |
| 277 | binwalker | 10.000 | 0.247 | |
| 278 | 永雏塔蝶 | 10.000 | 0.246 | |
| 279 | Mark Owen Ramos | 10.000 | 0.245 | |
| 280 | T0008 - HKCMatthew | 10.000 | 0.245 | |
| 281 | mono | 10.000 | 0.244 | |
| 282 | O0135 - Cyber10neWolf | 10.000 | 0.243 | |
| 283 | iami233 | 10.000 | 0.243 | |
| 284 | O0061 - Turtl3T3ch | 10.000 | 0.242 | |
| 285 | Haiyaa | 10.000 | 0.241 | |
| 286 | EditaCTF | 10.000 | 0.241 | |
| 287 | Aden Kallery | 10.000 | 0.240 | |
| 288 | 小五六 | 10.000 | 0.239 | |
| 289 | O0088 - HOPE | 10.000 | 0.239 | |
| 290 | Thomas Klemmensen | 10.000 | 0.238 | |
| 291 | Zain | 10.000 | 0.237 | |
| 292 | QWKA00 | 10.000 | 0.237 | |
| 293 | mrfaei | 10.000 | 0.236 | |
| 294 | Noskcid | 10.000 | 0.235 | |
| 295 | SAIF | 10.000 | 0.235 | |
| 296 | OTTO RUSH | 10.000 | 0.234 | |
| 297 | john | 10.000 | 0.233 | |
| 298 | T0002 - CityU | 10.000 | 0.233 | |
| 299 | O0046 - 9hack | 10.000 | 0.232 | |
| 300 | Munna | 10.000 | 0.232 | |
| 301 | iDkh0WtOINpU7 | 10.000 | 0.231 | |
| 302 | brouette | 10.000 | 0.230 | |
| 303 | peaceful-dreamer | 10.000 | 0.230 | |
| 304 | kokoška | 10.000 | 0.229 | |
| 305 | O0048 - fatman | 10.000 | 0.229 | |
| 306 | 杨慧镁 | 10.000 | 0.228 | |
| 307 | O0168 - Newbie | 10.000 | 0.227 | |
| 308 | OHG | 10.000 | 0.227 | |
| 309 | O0009 - MSPeople | 10.000 | 0.226 | |
| 310 | O0093 - div1121 | 10.000 | 0.226 | |
| 311 | O0013 - Joshua Lum | 10.000 | 0.113 | |
