Fri, 19 Dec. 2025, 08:00 UTC — Sun, 21 Dec. 2025, 08:00 UTC
On-line
A HKCERT CTF event.
Format: Jeopardy 
Official URL: https://ctf.hkcert.org/
This event's future weight is subject of public voting!
Event organizers
HKCERT Capture The Flag 2025,” organised by the Hong Kong Computer Emergency Response Team Coordination Centre (HKCERT), the Hong Kong Productivity Council (HKPC) and the Digital Policy Office of HKSAR, is now in its sixth edition. It is one of the largest cybersecurity competitions in Hong
Kong, featuring four categories: Secondary School, Tertiary, Open, and International.
This year there will be an online Jeopardy CTF (qualifying round) and a physical CTF with offensive and defensive challenges (Final round).
Please register at below HKCERT CTF website
https://ctf.hkcert.org
(Registration deadline: 14 Dec 2025)
There are 2 rounds of the competition -> qualifying round and final round.
The top 5 teams of each category of the qualifying round will advance to the onsite final round at Hong Kong.
The prize for the winners in the final round are as below
Gold: HKD 16,000 ( Per Team )
Silver: HKD 13,000 ( Per Team )
Bronze: HKD 11,000 ( Per Team )
Please register at below HKCERT CTF website
https://ctf.hkcert.org
(Registration deadline: 14 Dec 2025)
567 teams total
| Place | Team | CTF points | Rating points | |
|---|---|---|---|---|
| 1 | Project Sekai | 11420.000 | 166.420 | |
| 2 | ChinaTelecom CyberSecurity Team | 11403.000 | 124.691 | |
| 3 | W&M | 11386.000 | 110.699 | |
| 4 | SU | 11311.000 | 103.218 | |
| 5 | Azure Assassin Alliance | 10763.000 | 95.065 | |
| 6 | Lilac | 10545.000 | 90.703 | |
| 7 | UIT-Wanna.W1n | 10454.000 | 88.059 | |
| 8 | 天枢 | 10450.000 | 86.544 | |
| 9 | BunkyoWesterns | 9801.000 | 80.659 | |
| 10 | Bocil_Roblox | 9136.000 | 74.889 | |
| 11 | waterdrop | 8934.000 | 72.661 | |
| 12 | destiny | 8855.000 | 71.455 | |
| 13 | None | 8425.000 | 67.788 | |
| 14 | Redbud | 8295.000 | 66.384 | |
| 15 | Xrganizers | 8040.000 | 64.130 | |
| 16 | 0ops | 8011.000 | 63.571 | |
| 17 | Polaris | 7895.000 | 62.420 | |
| 18 | Students Taking Flags United | 7869.000 | 61.959 | |
| 19 | jwbs | 7797.000 | 61.191 | |
| 20 | Redback Crawlers Ensemble | 7727.000 | 60.462 | |
| 21 | 0xFFF | 7386.000 | 57.779 | |
| 22 | IRESDTU | 7319.000 | 57.111 | |
| 23 | Black Bauhinia | 7155.000 | 55.752 | |
| 24 | NuttyShell | 6914.000 | 53.845 | |
| 25 | KUNLUN | 6751.000 | 52.518 | |
| 26 | DrovoCR4.sh | 6603.000 | 51.312 | |
| 27 | The Few Chosen | 6542.000 | 50.749 | |
| 28 | ARESx | 6032.000 | 46.923 | |
| 29 | Mini-Venom | 5867.000 | 45.618 | |
| 30 | Elephant_can_fly | 5817.000 | 45.158 | |
| 31 | Capture The Failures | 5796.000 | 44.916 | |
| 32 | NuttyShell Purple | 5732.000 | 44.366 | |
| 33 | Icebird | 5637.000 | 43.595 | |
| 34 | WE AIN'T SHAR | 5618.000 | 43.382 | |
| 35 | bluebud | 5500.000 | 42.452 | |
| 36 | 0psu3 | 5496.000 | 42.357 | |
| 37 | S™ | 5433.000 | 41.836 | |
| 38 | Gimel | 5204.000 | 40.108 | |
| 39 | Maple_Leaves | 5194.000 | 39.979 | |
| 40 | Flagaholic | 5135.000 | 39.496 | |
| 41 | TorchW00d | 4984.000 | 38.345 | |
| 42 | NuttyShell Red | 4869.000 | 37.458 | |
| 43 | EICS1 | 4690.000 | 36.108 | |
| 44 | Happy_Birthday | 4634.000 | 35.656 | |
| 45 | Red Hare | 4617.000 | 35.490 | |
| 46 | What() | 4509.000 | 34.663 | |
| 47 | MEDUSA | 4394.000 | 33.787 | |
| 48 | H4ckForFun | 4314.000 | 33.167 | |
| 49 | Novaxis | 4299.000 | 33.022 | |
| 50 | shsetsSec | 4298.000 | 32.981 | |
| 51 | Ph0ny | 4263.000 | 32.693 | |
| 52 | glzjinsbot | 4227.000 | 32.400 | |
| 53 | AUTOEXEC.BAT | 4211.000 | 32.253 | |
| 54 | hello world has been taken | 4154.000 | 31.808 | |
| 55 | BIT | 4092.000 | 31.329 | |
| 56 | T0003 (2025 Reunion) @ TWY's Temple | 4062.000 | 31.083 | |
| 57 | I1689 | 3995.000 | 30.569 | |
| 58 | CRYPT1C | 3938.000 | 30.128 | |
| 59 | EDRI-CSG | 3883.000 | 29.703 | |
| 60 | The Ants | 3811.000 | 29.155 | |
| 61 | Kheshig | 3725.000 | 28.506 | |
| 62 | nature | 3681.000 | 28.163 | |
| 63 | S0166 - Tin Ka Ping Secondary School | 3639.000 | 27.836 | |
| 64 | JRHM | 3631.000 | 27.757 | |
| 65 | 2boysOnePwn | 3546.000 | 27.118 | |
| 66 | TheRomanXpl0it | 3424.000 | 26.209 | |
| 67 | ChiLL Chain | 3420.000 | 26.161 | |
| 68 | n0ng1eibur4n9 | 3409.000 | 26.063 | |
| 69 | Nepnep | 3375.000 | 25.797 | |
| 70 | f4n_g4mm4 | 3295.000 | 25.197 | |
| 71 | S0551 - Fanling Kau Yan College | 3260.000 | 24.925 | |
| 72 | thehackerscrew | 3095.000 | 23.707 | |
| 73 | 翼安先锋 | 3004.000 | 23.028 | |
| 74 | Night Heron | 2967.000 | 22.743 | |
| 75 | nuttyshell blue | 2947.000 | 22.582 | |
| 76 | NEURON | 2945.000 | 22.553 | |
| 77 | 思极ADsec | 2944.000 | 22.532 | |
| 78 | SGAD | 2944.000 | 22.518 | |
| 80 | FYC_is_GAY | 2916.000 | 22.287 | |
| 81 | S0020 - Sing Yin Secondary School | 2845.000 | 21.757 | |
| 82 | chill guys | 2844.000 | 21.737 | |
| 83 | Cyb3r_Star | 2841.000 | 21.703 | |
| 84 | ech0 | 2838.000 | 21.669 | |
| 85 | S0183 - St. Louis School | 2827.000 | 21.577 | |
| 86 | Child Players | 2796.000 | 21.340 | |
| 87 | PwnStars✨ | 2790.000 | 21.285 | |
| 88 | chinjee4590672 | 2753.000 | 21.005 | |
| 89 | Eenzege Star | 2717.000 | 20.732 | |
| 90 | ECNU | 2704.000 | 20.627 | |
| 91 | SCTAAAAAX | 2653.000 | 20.245 | |
| 92 | S0192 - Diocesan Boys' School | 2648.000 | 20.199 | |
| 93 | Win or Mushroom | 2618.000 | 19.970 | |
| 94 | S0422 - Chiu Chow Association Secondary School | 2536.000 | 19.363 | |
| 95 | Morning_ST4R | 2528.000 | 19.296 | |
| 96 | NTU@SG B4nyan Hax0rs | 2522.000 | 19.243 | |
| 97 | T1009 - HKUST | 2500.000 | 19.074 | |
| 98 | mimicats | 2488.000 | 18.977 | |
| 99 | Birkenwald | 2457.000 | 18.743 | |
| 100 | BitStorm | 2455.000 | 18.720 | |
| 101 | S0098 - Yan Chai Hospital Law Chan Chor Si College | 2413.000 | 18.406 | |
| 102 | Win+X | 2399.000 | 18.296 | |
| 103 | NuttyShell Alpha | 2369.000 | 18.069 | |
| 104 | S0539 - SHATIN PUI YING COLLEGE | 2336.000 | 17.821 | |
| 105 | S0217 - Pui Kiu College | 2293.000 | 17.500 | |
| 106 | Feebas✨ | 2287.000 | 17.449 | |
| 107 | Sombra hacked the flag! How can we win???????😵💫 | 2265.000 | 17.281 | |
| 108 | hackeresan | 2255.000 | 17.201 | |
| 109 | T0992 - CityU, CUHK, PolyU | 2233.000 | 17.034 | |
| 110 | Cha_god_molmol | 2181.000 | 16.648 | |
| 111 | 4ur0ra_two | 2155.000 | 16.452 | |
| 112 | or4nge | 2094.000 | 16.001 | |
| 113 | 9527-Molecular Laboratory | 2084.000 | 15.921 | |
| 114 | kz | 2066.000 | 15.783 | |
| 115 | S0374 - Tuen Mun Catholic Secondary School | 2021.000 | 15.449 | |
| 116 | CMCC Iron Eagle | 1975.000 | 15.108 | |
| 117 | NISA | 1972.000 | 15.080 | |
| 118 | ITSEC ASIA | 1939.000 | 14.833 | |
| 119 | flux | 1887.000 | 14.449 | |
| 120 | S0177 - fanling lutheran secondary school | 1878.000 | 14.377 | |
| 121 | geek_sec | 1877.000 | 14.364 | |
| 122 | gaslighting | 1860.000 | 14.235 | |
| 123 | S0201 - St. Joseph's College | 1845.000 | 14.120 | |
| 124 | MaimaiDX | 1836.000 | 14.049 | |
| 125 | fa1ry | 1780.000 | 13.635 | |
| 126 | PwnHub | 1775.000 | 13.594 | |
| 127 | CIBgogogo | 1764.000 | 13.508 | |
| 128 | CityYuHK Ma Liu Shui | 1720.000 | 13.183 | |
| 129 | BeFunLab | 1719.000 | 13.170 | |
| 130 | HK MegaKnight | 1701.000 | 13.034 | |
| 131 | I want to go to HK | 1687.000 | 12.927 | |
| 132 | 不说包的,要说志在必得 | 1686.000 | 12.915 | |
| 133 | Who_has_Flag | 1651.000 | 12.655 | |
| 134 | Aurora | 1648.000 | 12.629 | |
| 135 | SSSec235 | 1646.000 | 12.610 | |
| 136 | HachikeMiaoUsagi | 1577.000 | 12.102 | |
| 137 | Losangle Lakers | 1535.000 | 11.792 | |
| 138 | Lavender | 1533.000 | 11.773 | |
| 139 | axiom | 1513.000 | 11.623 | |
| 140 | My4nM4r | 1510.000 | 11.597 | |
| 141 | GTFF | 1492.000 | 11.461 | |
| 142 | I1635 | 1483.000 | 11.392 | |
| 143 | YunSee | 1479.000 | 11.358 | |
| 144 | 爱吃西红柿 | 1472.000 | 11.303 | |
| 145 | krauq | 1469.000 | 11.277 | |
| 146 | DontByteUs | 1464.000 | 11.237 | |
| 147 | I1022 | 1451.000 | 11.139 | |
| 148 | EISBanana | 1443.000 | 11.076 | |
| 149 | Garda Elite Penjaga Waifu | 1425.000 | 10.941 | |
| 150 | KFC | 1422.000 | 10.916 | |
| 151 | BD_CIRT_Dr@g0nS | 1418.000 | 10.883 | |
| 152 | 对勾对z | 1413.000 | 10.843 | |
| 153 | S0475 - Lai King Catholic Secondary School | 1409.000 | 10.810 | |
| 154 | Geek_Team | 1404.000 | 10.770 | |
| 155 | GWZ | 1396.000 | 10.709 | |
| 156 | Dr0g3n_H3x | 1394.000 | 10.691 | |
| 157 | Guinsoo's Rageblade | 1381.000 | 10.592 | |
| 158 | bruhopen | 1367.000 | 10.487 | |
| 159 | S0506 - St. Francis Xavier's School, T.W. | 1366.000 | 10.476 | |
| 160 | !Not Chill Player | 1363.000 | 10.451 | |
| 161 | DROP TABLE teams;-- | 1361.000 | 10.434 | |
| 162 | V0idNu1L | 1287.000 | 9.891 | |
| 163 | CtrlC_Masters | 1270.000 | 9.764 | |
| 164 | 666-Meow Team Messes Up | 1221.000 | 9.404 | |
| 166 | MetaGriPwn | 1213.000 | 9.340 | |
| 167 | Courage Makes Vision Wider | 1212.000 | 9.329 | |
| 168 | I1270 | 1205.000 | 9.275 | |
| 169 | dozer | 1203.000 | 9.258 | |
| 171 | 老蔡才是MVP | 1190.000 | 9.157 | |
| 172 | Geek_OnePanda | 1182.000 | 9.096 | |
| 173 | NuttyShell Sigma | 1172.000 | 9.021 | |
| 174 | P014r15 | 1168.000 | 8.989 | |
| 175 | skill_issue | 1149.000 | 8.847 | |
| 176 | _F@n | 1142.000 | 8.794 | |
| 177 | S0499 - Sing Yin Secondary School | 1122.000 | 8.645 | |
| 178 | T0977 - CUHK | 1122.000 | 8.643 | |
| 179 | Me1l1der_S3cr3t | 1121.000 | 8.633 | |
| 180 | TRIODE_IS_GOD | 1118.000 | 8.608 | |
| 181 | Drained By Work No Time CTF | 1101.000 | 8.482 | |
| 182 | T0085 - THEi | 1092.000 | 8.414 | |
| 183 | T1024 - Kali | 1048.000 | 8.091 | |
| 184 | T1016 - CityU | 1037.000 | 8.008 | |
| 185 | Hmmmm | 1037.000 | 8.006 | |
| 186 | O0948 | 1036.000 | 7.996 | |
| 187 | I0621 | 1030.000 | 7.950 | |
| 188 | Belma's Goat Factory | 1026.000 | 7.918 | |
| 189 | S0537 - SHATIN PUI YING COLLEGE | 1024.000 | 7.901 | |
| 190 | S0390 - Wah Yan College, Kowloon | 1023.000 | 7.892 | |
| 191 | Flag? When did you come? | 1019.000 | 7.860 | |
| 192 | CyberSquasher | 1017.000 | 7.844 | |
| 193 | Skibidi Sigmas | 1016.000 | 7.834 | |
| 194 | The clique | 1006.000 | 7.759 | |
| 195 | T0783 - CUHK | 995.000 | 7.677 | |
| 196 | LingDunSec | 975.000 | 7.529 | |
| 197 | S0486 - CARMEL SECONDARY SCHOOL | 968.000 | 7.476 | |
| 198 | S0473 - Kowloon True Light School | 934.000 | 7.226 | |
| 199 | BlastFL4G | 926.000 | 7.165 | |
| 200 | w_x_w | 924.000 | 7.149 | |
| 201 | 看看题 | 916.000 | 7.088 | |
| 202 | d0zer | 915.000 | 7.079 | |
| 203 | S0511 - Sing Yin Secondary School | 899.000 | 6.960 | |
| 204 | tmp | 879.000 | 6.813 | |
| 205 | S0178 - Hong Kong Management Association David Li Kwok Po College | 876.000 | 6.789 | |
| 206 | S0392 - Wah Yan College, Kowloon | 875.000 | 6.779 | |
| 207 | SSSec798 | 874.000 | 6.770 | |
| 208 | 崩铁启动 | 870.000 | 6.739 | |
| 209 | d7po | 867.000 | 6.715 | |
| 210 | further_ocean-complex | 850.000 | 6.590 | |
| 211 | ooffline | 838.000 | 6.500 | |
| 212 | S0445 - CARMEL SECONDARY SCHOOL | 833.000 | 6.462 | |
| 213 | Shell01-Team | 828.000 | 6.424 | |
| 214 | OTNOPAY | 821.000 | 6.371 | |
| 215 | ThisIsUnsafe | 808.000 | 6.274 | |
| 216 | Take_It_Easy | 803.000 | 6.236 | |
| 217 | pololololobao | 801.000 | 6.220 | |
| 218 | 星光成炬 | 800.000 | 6.211 | |
| 219 | S0436 - 仁愛堂田家炳中學 | 789.000 | 6.129 | |
| 220 | 朝花夕拾杯中酒 | 782.000 | 6.076 | |
| 221 | SParK | 772.000 | 6.002 | |
| 222 | AXHU·xuan_shu | 769.000 | 5.978 | |
| 223 | ICEDTEA | 754.000 | 5.867 | |
| 224 | HuoGuoEr | 754.000 | 5.865 | |
| 225 | Icy G | 753.000 | 5.856 | |
| 226 | S0459 - Kowloon True Light School | 753.000 | 5.855 | |
| 227 | BangDream It's MyGo!!!!! | 751.000 | 5.839 | |
| 228 | 16j | 750.000 | 5.830 | |
| 229 | Ciallo~(∠・ω< ) | 734.000 | 5.712 | |
| 230 | S0472 - Kowloon True Light School | 725.000 | 5.644 | |
| 231 | T0860 - CUHK | 722.000 | 5.621 | |
| 232 | Evi1_King'5_True_Eye | 713.000 | 5.554 | |
| 233 | S0465 - Kowloon True Light School | 705.000 | 5.494 | |
| 234 | S0466 - Kowloon True Light School | 705.000 | 5.492 | |
| 235 | S0467 - Kowloon True Light School | 705.000 | 5.491 | |
| 236 | S0468 - Kowloon True Light School | 705.000 | 5.489 | |
| 237 | S0469 - Kowloon True Light School | 705.000 | 5.488 | |
| 238 | S0470 - Kowloon True Light School | 705.000 | 5.486 | |
| 239 | S0471 - Kowloon True Light School | 705.000 | 5.485 | |
| 240 | 先签到 | 703.000 | 5.469 | |
| 241 | MaLiuShui | 698.000 | 5.431 | |
| 242 | T0294 - HKU | 695.000 | 5.408 | |
| 243 | Marcio Herobrine | 692.000 | 5.385 | |
| 244 | S0540 - SHATIN PUI YING COLLEGE | 671.000 | 5.230 | |
| 245 | BLACKWING 🐦⬛ | 670.000 | 5.221 | |
| 246 | T0089 - HKCT | 670.000 | 5.220 | |
| 247 | wuliwa_aeiou_breakingbad_mmk | 664.000 | 5.175 | |
| 248 | 0 | 661.000 | 5.152 | |
| 249 | I0186 | 649.000 | 5.063 | |
| 250 | S0409 - The Chinese Foundation Secondary School | 643.000 | 5.018 | |
| 252 | New Type | 638.000 | 4.979 | |
| 253 | kn0ck | 636.000 | 4.963 | |
| 254 | ggstudy_ddup | 634.000 | 4.947 | |
| 255 | Silly Security | 634.000 | 4.946 | |
| 256 | S0104 - SKH Lam Woo Memorial Secondary School | 623.000 | 4.864 | |
| 257 | pikachu | 621.000 | 4.849 | |
| 258 | H3110_W0r1d | 599.000 | 4.687 | |
| 259 | Hex404 | 591.000 | 4.628 | |
| 260 | We_Are_CTFMan | 589.000 | 4.612 | |
| 261 | S0529 - Diocesan Girls' School | 587.000 | 4.596 | |
| 262 | YuFeng Lab | 584.000 | 4.573 | |
| 263 | I0093 | 577.000 | 4.521 | |
| 264 | Daily Dreaming Coders | 575.000 | 4.505 | |
| 265 | WAHAHA | 566.000 | 4.438 | |
| 266 | TechCERT_Spark | 565.000 | 4.430 | |
| 267 | Not-So-FantasticFour | 565.000 | 4.428 | |
| 268 | HeapUnderflow | 557.000 | 4.369 | |
| 269 | CUHK0x | 557.000 | 4.368 | |
| 270 | Roastbird | 555.000 | 4.352 | |
| 271 | 下北澤會員制餐廳 | 555.000 | 4.351 | |
| 272 | SSSec777 | 553.000 | 4.335 | |
| 273 | 0O3032400 | 526.000 | 4.137 | |
| 274 | Ginkgo | 525.000 | 4.129 | |
| 275 | XiliuDRI | 512.000 | 4.033 | |
| 276 | sub::version | 509.000 | 4.010 | |
| 277 | gugugaga | 503.000 | 3.965 | |
| 278 | NovaVanguard | 496.000 | 3.913 | |
| 279 | Sigmas | 496.000 | 3.912 | |
| 280 | 脆骨 | 495.000 | 3.904 | |
| 281 | World's end BLACKBOX | 492.000 | 3.881 | |
| 282 | MEOW MEOW MEOW MEOW MEOW | 490.000 | 3.865 | |
| 283 | Flag Heist | 490.000 | 3.864 | |
| 284 | COMPASS | 487.000 | 3.841 | |
| 285 | ING FLAGS | 480.000 | 3.789 | |
| 286 | XSG | 479.000 | 3.781 | |
| 287 | wwwaaa | 478.000 | 3.773 | |
| 288 | Greenhorn_team | 476.000 | 3.757 | |
| 289 | Onicoders-UciTeam | 473.000 | 3.734 | |
| 290 | 云顶刺客 | 472.000 | 3.726 | |
| 291 | WJWG | 461.000 | 3.645 | |
| 292 | 827114-Saber | 450.000 | 3.564 | |
| 293 | C@tt | 446.000 | 3.534 | |
| 294 | S0519 - St. Joseph's College | 442.000 | 3.504 | |
| 295 | Sungone | 441.000 | 3.495 | |
| 296 | T0001-CT Champ | 436.000 | 3.458 | |
| 297 | Origin | 435.000 | 3.450 | |
| 298 | OnePanda | 433.000 | 3.434 | |
| 299 | T0177 - HKCT | 425.000 | 3.375 | |
| 300 | Ph1ny | 424.000 | 3.367 | |
| 301 | S0414 - H.K. & Kowloon Kaifong Women's Association Sun Fong Chung College | 417.000 | 3.315 | |
| 302 | strong | 416.000 | 3.307 | |
| 303 | WannaCry | 414.000 | 3.291 | |
| 304 | ss0t | 407.000 | 3.239 | |
| 305 | wge | 407.000 | 3.238 | |
| 306 | Thoth-Moon | 397.000 | 3.165 | |
| 307 | SeaFourCYME | 397.000 | 3.164 | |
| 308 | 看看看题 | 395.000 | 3.148 | |
| 309 | NCCU_MPIS | 390.000 | 3.111 | |
| 310 | SRisFun3 | 387.000 | 3.088 | |
| 311 | sign | 384.000 | 3.066 | |
| 312 | M00n1ight | 381.000 | 3.043 | |
| 313 | 9003 | 376.000 | 3.006 | |
| 314 | yuppie | 376.000 | 3.005 | |
| 315 | TableFlippingU | 374.000 | 2.989 | |
| 316 | MoMaGaGai_1234 | 374.000 | 2.988 | |
| 317 | DragonShell | 372.000 | 2.973 | |
| 318 | We_Are_Fczy | 370.000 | 2.958 | |
| 319 | S0518 - Man Kwan QualiEd College | 363.000 | 2.906 | |
| 320 | Flag Snatch And Bolt | 360.000 | 2.883 | |
| 321 | Ch4ng3rs | 359.000 | 2.875 | |
| 322 | livitr | 351.000 | 2.816 | |
| 323 | Ifahssilooc | 351.000 | 2.815 | |
| 324 | see2run | 350.000 | 2.807 | |
| 325 | O0767 | 348.000 | 2.792 | |
| 326 | interstellar | 346.000 | 2.776 | |
| 327 | #ffff00 | 339.000 | 2.725 | |
| 328 | hhhhh | 338.000 | 2.716 | |
| 329 | S0263 - The Chinese Foundation Secondary School | 327.000 | 2.636 | |
| 330 | I1550 | 321.000 | 2.591 | |
| 331 | we know nothing | 318.000 | 2.568 | |
| 332 | S0323 - Buddhist Sin Tak College | 318.000 | 2.568 | |
| 333 | 辣子鸡 | 318.000 | 2.567 | |
| 334 | flyingpig | 315.000 | 2.544 | |
| 335 | grey | 305.000 | 2.471 | |
| 336 | S0439 - Yan Oi Tong Tin Ka Ping Secondary School | 305.000 | 2.470 | |
| 337 | Kumar Slayers | 298.000 | 2.418 | |
| 338 | two | 298.000 | 2.418 | |
| 339 | Team Duck | 298.000 | 2.417 | |
| 340 | Lapse_Risk_Team | 296.000 | 2.401 | |
| 341 | T1029 - CityU | 295.000 | 2.393 | |
| 342 | [NULL] | 295.000 | 2.393 | |
| 343 | 得闲饮茶 | 295.000 | 2.392 | |
| 344 | T0238 - CityU | 295.000 | 2.391 | |
| 345 | Tech Potato | 295.000 | 2.391 | |
| 346 | S0504 - Queen Elizabeth School Old Students' Association Secondary School | 291.000 | 2.361 | |
| 347 | Golden_Snitch | 290.000 | 2.353 | |
| 348 | Overf1ow | 275.000 | 2.243 | |
| 349 | Fenice | 275.000 | 2.242 | |
| 350 | HexBorne | 274.000 | 2.234 | |
| 351 | CatFlag | 273.000 | 2.226 | |
| 352 | Machine-in-the-Middle School Dropouts | 273.000 | 2.226 | |
| 353 | ctf+86 | 272.000 | 2.218 | |
| 354 | LoveFromMimic | 272.000 | 2.217 | |
| 355 | npc | 271.000 | 2.209 | |
| 356 | NighHAX | 269.000 | 2.194 | |
| 357 | R_OxPloit3rs | 269.000 | 2.193 | |
| 358 | Binary Bandits | 266.000 | 2.171 | |
| 359 | 我想要上床下桌 | 265.000 | 2.163 | |
| 360 | hackOverflow | 265.000 | 2.162 | |
| 361 | Sevenstars | 265.000 | 2.161 | |
| 362 | I need get flag to hit on her. | 265.000 | 2.161 | |
| 363 | S0501 - Po Leung Kuk Celine Ho Yam Tong College | 261.000 | 2.131 | |
| 364 | TC_Anons | 261.000 | 2.130 | |
| 365 | m1xu3 | 259.000 | 2.115 | |
| 366 | TeamSix - KuangChan | 259.000 | 2.115 | |
| 367 | DNA001-Neon Sprawl DNA Unit | 259.000 | 2.114 | |
| 368 | NF_CTF | 257.000 | 2.099 | |
| 369 | S0533 - LAM TAI FAI COLLEGE | 257.000 | 2.098 | |
| 370 | 1or1 | 250.000 | 2.046 | |
| 371 | BlueWhale | 250.000 | 2.046 | |
| 372 | ctrl | 249.000 | 2.038 | |
| 373 | 0xC3500 | 249.000 | 2.037 | |
| 374 | O10086-失败的Man | 249.000 | 2.037 | |
| 375 | born to exploit, forced to study | 246.000 | 2.014 | |
| 376 | I1567 | 245.000 | 2.006 | |
| 377 | Red Elephant | 245.000 | 2.006 | |
| 378 | PH1niX IGNITE! | 230.000 | 1.896 | |
| 379 | a32x86 | 227.000 | 1.874 | |
| 380 | Stellar Convergence | 227.000 | 1.873 | |
| 381 | STAR_CTF | 226.000 | 1.865 | |
| 382 | NoMoreBilewater | 226.000 | 1.865 | |
| 383 | Victims of Authentic GEMC | 226.000 | 1.864 | |
| 384 | CodeBloodedSibs | 226.000 | 1.863 | |
| 385 | B14ck 1ce | 226.000 | 1.863 | |
| 386 | jhws_N7s3c | 225.000 | 1.855 | |
| 387 | Boldeas | 224.000 | 1.847 | |
| 388 | Burger King's Tea | 223.000 | 1.839 | |
| 389 | Big_shet | 220.000 | 1.817 | |
| 390 | Sensei | 217.000 | 1.794 | |
| 391 | 10086 - ZERO | 207.000 | 1.721 | |
| 392 | ANaNSI | 202.000 | 1.684 | |
| 393 | 桂花战队 | 202.000 | 1.684 | |
| 394 | Would you like to define the team name? | 201.000 | 1.676 | |
| 395 | D0710-Come and stand as punishment | 200.000 | 1.668 | |
| 396 | Koi | 199.000 | 1.660 | |
| 397 | T0983 - HKU | 199.000 | 1.660 | |
| 398 | QJWD | 199.000 | 1.659 | |
| 399 | Budwisher | 199.000 | 1.659 | |
| 400 | 01pr0m1se | 199.000 | 1.658 | |
| 401 | ThreeKings | 199.000 | 1.657 | |
| 402 | 只想摸鱼不想打CTF | 199.000 | 1.657 | |
| 403 | TryCTF | 198.000 | 1.649 | |
| 404 | S0375 - Tuen Mun Catholic Secondary School | 198.000 | 1.649 | |
| 405 | 你说的都对 | 197.000 | 1.641 | |
| 406 | Why @m 1 h3r3 | 197.000 | 1.640 | |
| 407 | QF.Team | 196.000 | 1.633 | |
| 408 | give me a flag | 180.000 | 1.515 | |
| 409 | ShibaSecure#1 | 180.000 | 1.515 | |
| 410 | flag | 180.000 | 1.514 | |
| 411 | TXSec | 178.000 | 1.499 | |
| 412 | 没有你 | 178.000 | 1.499 | |
| 413 | Dividing_Line | 178.000 | 1.498 | |
| 414 | S0550 - Carmel Secondary School | 176.000 | 1.483 | |
| 415 | f1aggingbehind | 176.000 | 1.483 | |
| 416 | O1001 | 176.000 | 1.482 | |
| 417 | S0330 - Youth College (Kwai Fong) | 176.000 | 1.482 | |
| 418 | Zero Domain Security | 176.000 | 1.481 | |
| 419 | T0373 - CUHK | 176.000 | 1.481 | |
| 420 | S0391 - Wah Yan College, Kowloon | 176.000 | 1.481 | |
| 421 | 204 | 176.000 | 1.480 | |
| 422 | S0118 - The YWCA Hioe Tjo Yoeng College | 175.000 | 1.472 | |
| 423 | Ctfctf666 | 167.000 | 1.414 | |
| 424 | GDUFS_Hacker_Team | 161.000 | 1.369 | |
| 425 | OneSword | 161.000 | 1.369 | |
| 426 | 0x3b | 161.000 | 1.368 | |
| 427 | elif | 161.000 | 1.368 | |
| 428 | ByteGuardians | 160.000 | 1.360 | |
| 429 | ctfgc | 158.000 | 1.345 | |
| 430 | The_knower | 154.000 | 1.316 | |
| 431 | Netr0Guardian | 150.000 | 1.286 | |
| 432 | Gome | 148.000 | 1.271 | |
| 433 | Evan | 148.000 | 1.271 | |
| 434 | Crypto_Catchers | 142.000 | 1.226 | |
| 435 | T02330 - EscapeFromHKCC | 138.000 | 1.197 | |
| 436 | 又爆零了 | 138.000 | 1.196 | |
| 437 | YCWC | 138.000 | 1.196 | |
| 438 | no_name | 136.000 | 1.181 | |
| 439 | kaajak | 136.000 | 1.180 | |
| 440 | OneHalf | 134.000 | 1.165 | |
| 441 | we_tried | 134.000 | 1.165 | |
| 442 | 00008 – HK-noob | 134.000 | 1.165 | |
| 443 | S1ck Six s3v3n | 134.000 | 1.164 | |
| 444 | C3sec | 134.000 | 1.164 | |
| 445 | SS1 | 132.000 | 1.149 | |
| 446 | hubu_zero | 132.000 | 1.148 | |
| 447 | BungkusNet | 132.000 | 1.148 | |
| 448 | Try Again | 132.000 | 1.148 | |
| 449 | What_Flag | 132.000 | 1.147 | |
| 450 | GZ_leader | 130.000 | 1.132 | |
| 451 | JSDLXX | 130.000 | 1.132 | |
| 452 | STRUGLERS | 130.000 | 1.131 | |
| 453 | FlagHuntersX | 130.000 | 1.131 | |
| 454 | horti_CC | 130.000 | 1.131 | |
| 455 | Over Thinking | 130.000 | 1.130 | |
| 456 | Cyber Ninjas | 130.000 | 1.130 | |
| 457 | Onepad | 128.000 | 1.115 | |
| 458 | I0054 | 128.000 | 1.114 | |
| 459 | Hangar18 | 117.000 | 1.034 | |
| 460 | Sign in and go straight to sleep team | 113.000 | 1.004 | |
| 461 | Error Sheet | 113.000 | 1.004 | |
| 462 | ykx | 112.000 | 0.996 | |
| 463 | I1286-eat_orange | 112.000 | 0.996 | |
| 464 | CFSC WannaSafe | 112.000 | 0.995 | |
| 465 | IWANTMYCRUSHTALKSTOME | 110.000 | 0.980 | |
| 466 | I0737 | 110.000 | 0.980 | |
| 467 | Bro has useful info | 110.000 | 0.980 | |
| 468 | 2587 | 107.000 | 0.957 | |
| 469 | S0460 - Christ College | 104.000 | 0.935 | |
| 470 | Sunshine Earth Kindergarten | 96.000 | 0.877 | |
| 471 | Crychic | 94.000 | 0.862 | |
| 472 | CeSaaiKei | 94.000 | 0.861 | |
| 473 | aka3001 | 92.000 | 0.846 | |
| 474 | T0975 - HKUST | 92.000 | 0.846 | |
| 475 | ing | 92.000 | 0.846 | |
| 476 | NgHoYin | 90.000 | 0.831 | |
| 477 | helloWorld | 88.000 | 0.816 | |
| 478 | t3rm1n4t0rs | 88.000 | 0.815 | |
| 479 | We_Are_Rebirth | 88.000 | 0.815 | |
| 480 | h4ck | 88.000 | 0.815 | |
| 481 | SoybeanSec | 88.000 | 0.814 | |
| 482 | S0306 - Pui Shing Catholic Secondary School | 86.000 | 0.799 | |
| 483 | S0309 - Pui Shing Catholic Secondary School | 86.000 | 0.799 | |
| 484 | CS | 86.000 | 0.799 | |
| 485 | Saleem & Yazan | 86.000 | 0.798 | |
| 486 | ddw | 86.000 | 0.798 | |
| 487 | tothemoon | 86.000 | 0.797 | |
| 488 | TKOffice366 | 84.000 | 0.783 | |
| 489 | T0579 - THEi | 84.000 | 0.782 | |
| 490 | I0285 | 84.000 | 0.782 | |
| 491 | NoFlagForMice | 84.000 | 0.782 | |
| 492 | My Friends Dumped Me | 84.000 | 0.781 | |
| 493 | NOV | 84.000 | 0.781 | |
| 494 | mettaur | 84.000 | 0.780 | |
| 495 | PAPA | 84.000 | 0.780 | |
| 496 | S0320 - N.T. Heung Yee Kuk Yuen Long District Secondary School | 84.000 | 0.780 | |
| 497 | fzhshzh | 84.000 | 0.779 | |
| 498 | I0891 | 84.000 | 0.779 | |
| 499 | ABBCCC | 84.000 | 0.779 | |
| 500 | S0372 - Tuen Mun Catholic Secondary School | 84.000 | 0.778 | |
| 501 | S0545 - HKICC Lee Shau Kee School of Creativity | 84.000 | 0.778 | |
| 502 | MW2025 | 84.000 | 0.778 | |
| 503 | lantianbaiyun | 84.000 | 0.777 | |
| 504 | AngryBird | 82.000 | 0.763 | |
| 505 | undugketchup | 82.000 | 0.762 | |
| 506 | JiaSu_CTF | 82.000 | 0.762 | |
| 507 | Ciallo-Ciallo | 82.000 | 0.762 | |
| 508 | SEE | 82.000 | 0.761 | |
| 509 | R Square | 72.000 | 0.688 | |
| 510 | Imfly_Team | 69.000 | 0.666 | |
| 511 | CPC | 69.000 | 0.666 | |
| 512 | zzzctf | 69.000 | 0.665 | |
| 513 | S0503 - Diocesan Boys' School | 66.000 | 0.643 | |
| 514 | Geez | 58.000 | 0.584 | |
| 515 | S0186 - St. Louis School | 58.000 | 0.584 | |
| 516 | S0262 - The Chinese Foundation Secondary School | 58.000 | 0.584 | |
| 517 | S0388 - St. Joseph's College | 58.000 | 0.584 | |
| 518 | Slothy | 58.000 | 0.583 | |
| 519 | Just_For_Fun | 58.000 | 0.583 | |
| 520 | Jade-3952 | 58.000 | 0.583 | |
| 521 | CTF_FOREVER | 50.000 | 0.524 | |
| 522 | smallZ | 50.000 | 0.524 | |
| 523 | S0164 - CCC KEI TO SECONDARY SCHOOL | 48.000 | 0.509 | |
| 524 | xxd | 48.000 | 0.509 | |
| 525 | 0DIN - GHOST | 48.000 | 0.508 | |
| 526 | CTF_New | 46.000 | 0.493 | |
| 527 | S0431 - CCC Ming Yin College | 46.000 | 0.493 | |
| 528 | ztDName | 46.000 | 0.493 | |
| 529 | Tomato Ketchup | 46.000 | 0.492 | |
| 530 | Smaug | 46.000 | 0.492 | |
| 531 | Open Team 666 | 46.000 | 0.492 | |
| 532 | Cant_find_the_flag | 46.000 | 0.492 | |
| 534 | ca | 46.000 | 0.491 | |
| 535 | Skyxploit | 44.000 | 0.476 | |
| 536 | Amoda | 44.000 | 0.476 | |
| 537 | KyuRei | 44.000 | 0.476 | |
| 538 | L0vE | 44.000 | 0.475 | |
| 539 | MorganaTrace | 44.000 | 0.475 | |
| 541 | Nobody777 | 38.000 | 0.431 | |
| 542 | root | 38.000 | 0.430 | |
| 543 | bobo | 38.000 | 0.430 | |
| 544 | S0449 - GCC&ITKD Lau Pak Lok Secondary School | 38.000 | 0.430 | |
| 545 | _h4ck | 38.000 | 0.430 | |
| 546 | Zero_Day_Heroes | 38.000 | 0.429 | |
| 547 | Lunar_Scale | 38.000 | 0.429 | |
| 548 | Underdog | 38.000 | 0.429 | |
| 549 | alug | 38.000 | 0.428 | |
| 550 | T0195 - HKU | 38.000 | 0.428 | |
| 551 | LuanDaYiTong | 38.000 | 0.428 | |
| 552 | TENEB | 38.000 | 0.428 | |
| 553 | suspect | 38.000 | 0.427 | |
| 554 | Xin_Hao_Bie_Gao | 38.000 | 0.427 | |
| 555 | Outsiders | 38.000 | 0.427 | |
| 556 | O0585 | 38.000 | 0.427 | |
| 557 | Get_flags | 38.000 | 0.426 | |
| 558 | Qiu Qiu you Give me Flag | 38.000 | 0.426 | |
| 559 | zueler | 38.000 | 0.426 | |
| 560 | I0699 | 38.000 | 0.425 | |
| 561 | I1810 | 38.000 | 0.425 | |
| 562 | murk1s | 38.000 | 0.425 | |
| 563 | Ciallo | 38.000 | 0.425 | |
| 564 | S0402 - Ying Wa College | 38.000 | 0.424 | |
| 565 | S0403 - Ying Wa College | 38.000 | 0.424 | |
| 566 | S0463 - Christ College | 38.000 | 0.424 | |
| 567 | Gaetano's friends | 38.000 | 0.212 | |
| 568 | S0151 - Queen's College Old Boys' Association Secondary School | 20.000 | 0.146 | |
| 569 | CTF_Hunter | 20.000 | 0.146 | |
| 570 | have a try | 20.000 | 0.146 | |
| 571 | 长歌 | 20.000 | 0.146 | |
| 572 | AI is love | 20.000 | 0.146 | |
| 573 | S0428 - Clementi Secondary School | 20.000 | 0.145 | |
i am bug bounty hunter
Hi guys, I understand that the quality of the CTF this CTF is kind of, uh, have a lot of improvement space,
but I would like to remind you that your weight voting would affect the weighting next time (aka next organizer).
Although I can't vote so I have to remind everyone here.
But personally I would still vote 1/100 if I can vote :)
This shoddy CTF is in no way representative of Hong Kong's CTF scene; please look towards previous iterations and other competitions in the area!
hkcert please do better???
delay no more
Why is the CTF scheduled during exam time? This is really poor planning. Most students are unable to perform at their best or even can't attend.
Plus, why has the admin always disappeared?
It's very disappointing.
1/10.
Tbh, this is quite an unprofessional competition.
Regex are not provided.
While little to no hints are provided.
There are huge space for improvements.
Still, I'm very glad to see CTFs being held locally in Hong Kong!
Among the five advancing teams in the international group, four are from Mainland China, and the company behind these poor-quality challenges is also from Mainland China... This inevitably leads to many unfavorable associations... Hopefully, next year we can see challenges created by Hong Kong CTFers themselves.
This iteration of HKCERT CTF is not co-organized by Black Bauhinia. I'm very disappointed with this year co-organizer. There are so many problems in this year:
1. First/second/third blood bonus points
It's unfair to international players. If the CTF is strictly limited to local players only, I think it's still somewhat fine. However, you have to consider that HKCERT CTF has an international category, meaning that not all players (especially international players) can get first blooded when the challenges are released. In some teams, the time of the first wave is at 2 a.m. on their side. Like, what, are you expecting that they can stay awake just to get first blood bonus points?
2. Challenge waves release schedule
The wave schedule is not mentioned in anywhere before and even after the CTF has started. Some waves' schedule were announced only after players urging the co-organizer to do so. Also, the schedules were only announced through the official Discord server. Dude, your platform has a freaking notification system, is that just for decoration like a Christmas tree? I have to keep going back and forth with my team's server and the official Discord server just to see if there's any new waves, so I can get first blood bonus points in time.
Not only that, some players also complained about there's too many waves and challenges. Here's the direct quote from the player:
"There are too many challenges, and too many waves. I mean, if each chal is very hard thats ok, but if every chal gets tons of solves then I had to stay in front of my computer for like 30 fucking hours. Thats a torture. And also because of that ppl are winning because of blood's bonus (chals are relatively easy), so I just had to work when EVERY wave got started. I had to get up at 9 at weekend. And not to mention some challenges suck (sorry!). [...]"
3. Guessy challenges
Many challenges were just straight up guessing. There are so many of them that I can't even have the time to list them here.
4. Challenges reuse
I don't know if this is a Chinese CTF "culture" or what, some challenges are copied from other CTFs, some didn't even modify a single line of code. Example:
- web/nettool is reused from Mimic (Qiangwang) 2025 finals web/wuwa (Only the final SSRF part is different. The rest is the same)
- rev/easydriver is a direct copy from NepCTF2025 rev/XSafe (Writeup: https://tkazer.github.io/2025/07/31/NepCTF2025-XSafe/)
- crypto/ec-fun is reused from hxp 38C3 CTF crypto/alcoholic_variety (Writeup: https://hxp.io/blog/110/hxp-38C3-CTF-alcoholic_variety-writeup/)
and more...
Please, for the love of God, HKCERT, please bring back Black Bauhinia as a co-organizer in future iteration.
btw i hate findkey X:( so guessy
Black Bauhinia should return. This year’s HKCERT CTF is bullshit.
- Guessy challenges. I cannot list every example here, but if you participated, you likely know exactly what I mean, especially in Misc.
- Stealing challenges from other CTFs. Some reviewers have already raised this concern. Additionally, it also appears that other challenges were obtained through irresponsible organizer bought from authors of certain beginner level event, which explains why the overall quality was highly uneven.
- Suspected leakage of challenge and/or rule violations during the contest. The involvement of an irresponsible Chinese organizer, irresponsible Chinese challenge authors, and the strange final standings, where certain teams with no prior comparable results on CTFtime placed near the top, creates substantial grounds for concern. This is not just conjecture. There exists evidence.
I have no idea why Black Bauhinia did not organize the event this year, perhaps for reasons that are well known. However, if Hong Kong wishes to save reputation of this CTF or HKCERT HKPC or whatever, it is clear what needs to be done.
In addition, I want to say this to those who compete in the Secondary School category that genuinely care about CTFs: this event was absolutely shit, and you do not need to feel upset about your result here.
Your performance in a single, poorly run event does not define your ability or your potential. The CTF community offers countless well organized, high quality competitions that are worth your time and effort, and where you can grow and be evaluated fairly.