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HK Black Bauhinia

Also known as
  • BlackBauhinia
  • blackb6a

Website: https://b6a.black

Twitter: blackb6a

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A team based in Hong Kong.
(We are NOT affiliated with any associations.)

Participated in CTF events

Overall rating place: 47 with 417.670 pts in 2024

Country place: 1

PlaceEventCTF pointsRating points
27SECCON CTF 13 Quals1475.000038.500
40Hack.lu CTF 2024524.000014.244
31Blue Water CTF 2024595.000015.625
15ASIS CTF Quals 20241215.000017.335
14m0leCon CTF 2025 Teaser1124.000025.871
390BlackHat MEA CTF Qualification 2024400.00003.809
10SekaiCTF 20242414.000019.335
20idekCTF 20242728.000020.766
8CrewCTF 20245846.000020.099
18corCTF 20241895.000021.555
42HITCON CTF 2024 Quals801.000011.841
27UIUCTF 20247509.000042.832
46Google Capture The Flag 2024937.000014.320
84justCTF 2024 teaser296.00005.672
14Crypto CTF 20242519.000043.654
128ångstromCTF 2024890.000015.306
2Grey Cat The Flag 2024 Qualifiers12602.000030.995
24PlaidCTF 2024926.000027.560
14KalmarCTF 20244146.000011.915
9Cyber Apocalypse 2024: Hacker Royale20600.000027.360
26osu!gaming CTF 20244330.000012.615
9bi0sCTF 20247446.000049.636
7LA CTF 202416101.000024.609
23DiceCTF 2024 Quals2592.000026.727
3TetCTF 20245825.000069.186
42Insomni'hack teaser 2024536.00008.048
16IrisCTF 20244964.00009.846

Overall rating place: 20 with 584.425 pts in 2023

Country place: 1

PlaceEventCTF pointsRating points
4ASIS CTF Finals 20233291.00000.000
11SECCON CTF 2023 International Finals1258.000011.844
120CTF/TCTF 20233929.00000.000
24Hack.lu CTF 20231236.000026.425
18Balsn CTF 20231468.000028.195
9MapleCTF 20233330.000016.292
10ASIS CTF Quals 20231574.000038.171
8SECCON CTF 2023 Quals2952.000075.943
21HITCON CTF 2023 Quals1947.000031.822
3SekaiCTF 20237576.000026.367
25zer0pts CTF 20231510.000020.920
2Crypto CTF 20232808.000089.400
25UIUCTF 20231724.000019.115
64Google Capture The Flag 2023986.000014.091
40justCTF 20231023.00009.096
21Grey Cat The Flag 2023 Qualifiers3362.000012.490
6p4ctf 2023 teaser2131.000044.346
15m0leCon CTF 2023 Teaser920.000020.805
2Cryptoverse CTF 202312382.000036.780
5ångstromCTF 20233230.0000103.560
13PlaidCTF 20231748.000059.903
83Hack-A-Sat 4 Qualifiers191.00002.601
9Cyber Apocalypse 2023: The Cursed Mission21875.000024.534
18b01lers CTF2465.000014.975
28hxp CTF 20221002.000023.524
46KalmarCTF 20231642.00002.967
11pbctf 20231607.000018.262
4LA CTF 202314875.000029.598
24DiceCTF 20231945.000014.194
7idekCTF 2022*13495.000018.646
8TetCTF 20234380.000025.157

Overall rating place: 29 with 452.785 pts in 2022

Country place: 1

PlaceEventCTF pointsRating points
10ASIS CTF Finals 20221639.000056.793
2BackdoorCTF 20223146.000029.265
3BSides Mumbai CTF 20227259.000025.663
27RCTF 20224785.720023.599
15HITCON CTF 20222727.000044.343
45SECCON CTF 2022 Quals1029.000025.076
26Hack.lu CTF 20221692.000024.301
19ASIS CTF Quals 20221327.000035.714
6SekaiCTF 20228243.000022.698
11Balsn CTF 20221987.000026.774
12MapleCTF 20223779.000011.670
6corCTF 20224641.000017.493
29Aero CTF 2022149.00004.572
9UIUCTF 20225309.000022.682
5Crypto CTF 20224171.000055.259
44Google Capture The Flag 20221315.000019.197
30WeCTF 2022364.00002.641
17justCTF 20222366.000014.837
32DEF CON CTF Qualifier 2022420.000014.772
11ångstromCTF 20224781.000061.941
12PlaidCTF 20221551.000056.217
33LINE CTF 2022631.00003.795
10zer0pts CTF 20222364.000018.403
32Codegate CTF 2022 Preliminary1171.00003.976
1TSJ CTF 20223583.000049.480
5Decompetition v2.04871.320022.297
8DiceCTF 20223106.000015.193
48Real World CTF 4th172.00003.307
9TetCTF 20223938.000015.966

Overall rating place: 23 with 481.495 pts in 2021

Country place: 1

PlaceEventCTF pointsRating points
7ASIS CTF Finals 20213748.000050.013
17hxp CTF 20211713.000023.306
7SECCON CTF 20213679.000067.692
12HITCON CTF 20213556.000055.767
11Dragon CTF 20211423.000045.935
5Balsn CTF 20213608.000035.457
2DUNGEON - BSides Ahmedabad CTF 20213685.000035.348
17Hack.lu CTF 20212457.000047.316
16ASIS CTF Quals 20211609.000051.353
8pbctf 20212824.000016.382
33RCTF 20212443.000011.091
25CSAW CTF Qualification Round 20216334.00000.000
3ALLES! CTF 20213115.000038.616
13FwordCTF 202110165.000012.755
12InCTF 20218613.000031.795
9UIUCTF 20215856.000015.295
8Crypto CTF 20212892.000028.270
19CyBRICS CTF 20212126.000017.326
11IJCTF 20213656.00007.065
25Google Capture The Flag 20212892.000048.053
6redpwnCTF 20215738.000025.432
240CTF/TCTF 2021 Quals 2150.000023.870
36Hack-A-Sat 2 Qualifiers595.00000.000
1WeCTF 20218841.00000.000
2Zh3r0 CTF V215362.000030.281
11Pwn2Win CTF 20212705.000040.670
23kCTF-20217887.000034.863
14Cyber Apocalypse 202116800.000022.539
42PlaidCTF 20211401.000025.216
16ångstromCTF 20213965.000031.682
16Securinets CTF Quals 20215731.000017.377
11zer0pts CTF 20212757.000015.227
9Aero CTF 20211495.000016.253
11Union CTF 20213022.000013.679
22Tenable CTF 20214575.000016.067
13DiceCTF 20211885.000011.748
2BambooFox CTF 20215146.000036.080
9TetCTF 20212490.00009.360

Overall rating place: 29 with 448.604 pts in 2020

Country place: 1

PlaceEventCTF pointsRating points
31hxp CTF 20201339.000018.590
7ASIS CTF Finals 20202050.000053.475
16pbctf 20201643.00008.849
26HITCON CTF 20201536.000033.626
17Dragon CTF 20202226.000050.167
22Balsn CTF 20201284.00004.996
12Decompetition2289.830011.420
12Hack.lu CTF 20203048.000058.432
42mHackeCTF - Enterprise Edition1897.39003.478
5SECCON 2020 Online CTF3057.000055.482
11TokyoWesterns CTF 6th 20202876.000065.580
125CSAW CTF Qualification Round 20201105.000015.272
15 CONFidence CTF 2020 Finals880.00006.807
26ALLES! CTF 20201276.00007.191
30Google Capture The Flag 20201768.000027.150
23Hacker's Playground 2020634.00005.124
3Crypto CTF 20202843.000024.185
34PoseidonCTF 1st Edition1577.00004.837
49UNICORN CTF 20201180.00001.215
7InCTF 202010896.000036.585
6HacktivityCon CTF7630.000022.565
11CyBRICS CTF 20202313.000010.343
33kCTF-20208596.000027.647
4csictf 202022713.000029.588
2UIUCTF 20207126.000029.654
32rgbCTF 20208178.00009.134
9TSG CTF 20201736.000011.166
14ASIS CTF Quals 20202320.000035.764
43RCTF 20201190.00005.823
456DEF CON CTF Qualifier 2020200.00002.847
6IJCTF 20209214.000019.395
166PlaidCTF 2020251.00004.301
17Byte Bandits CTF 20204767.000025.790
21DawgCTF 20206380.000014.581
59VolgaCTF 2020 Qualifier1000.00008.347
27FireShell CTF 20203280.00009.257
61CONFidence CTF 2020 Teaser148.00002.472
13ångstromCTF 20204625.000029.838
14zer0pts CTF 20206131.000014.057
31Codegate CTF 2020 Preliminary2227.00004.720
20HackTM CTF Quals 20204466.000011.723
37Insomni'hack teaser 2020325.00009.202

Overall rating place: 46 with 290.834 pts in 2019

Country place: 1

PlaceEventCTF pointsRating points
32TetCTF 20203.00000.000
18hxp 36C3 CTF2650.000017.140
4UTC-CTF 2019 Teaser5041.00000.000
5watevrCTF 20194005.000022.133
88X-MAS CTF 20191986.00002.623
23CTFZone 2019 Quals1400.00008.870
4ASIS CTF Finals 20194019.000087.606
49Newbie CTF(N-CTF) 20196431.00000.000
14TastelessCTF 20191108.00007.264
29Hack.lu CTF 20191590.000015.077
15SECCON 2019 Online CTF4307.000028.830
33HITCON CTF 2019 Quals2572.000043.861
21Balsn CTF 20191533.00005.986
11BSides Delhi CTF 20195334.00008.782
6PwnThyBytes CTF 20193715.000017.043
868picoCTF 201911650.00000.000
68Teaser Dragon CTF 2019315.00003.580
28InCTF 20191832.00009.605
52Real World CTF 2019 Quals128.00001.648
49DefCamp CTF Qualification 2019615.00003.688
37Affinity CTF 2019 - Quals1161.00004.010
24N1CTF 2019886.00004.115
35TokyoWesterns CTF 5th 20191398.000039.554
12Crypto CTF 20191483.00009.987
22De1CTF 20192593.00006.712
51CyBRICS CTF Quals 2019582.00004.436

Organized CTF events

NameWeight
HKCERT CTF 2024 (Qualifying Round)61.22
HK Cyber Security New Generation CTF Challenge 2023 (Online)55.00
Bauhinia CTF 202324.75
HK Cyber Security New Generation CTF Challenge 202237.00
HK Cyber Security New Generation CTF Challenge 202125.00

Team members

Team writeups

EventTaskAction
HITCON CTF 2024 QualsNo-Exit Room [250]read writeup
SekaiCTF 2023[Blockchain] Re-Remix [493]read writeup
SekaiCTF 2023SSH [468]read writeup
LA CTF 2023EVMVM [497]read writeup
Balsn CTF 2022NFT Marketplace [358]read writeup
Balsn CTF 2022Cairo Reverse [182]read writeup
DiceCTF 2022commitment-issues [272]read writeup
TetCTF 2022picked onions [856]read writeup
TetCTF 2022algebra [831]read writeup
TetCTF 2022shares_v2 [804]read writeup
TetCTF 2022shares [216]read writeup
Dragon CTF 2021CRC Recursive Challenge (warmup) [333]read writeup
DUNGEON - BSides Ahmedabad CTF 2021They Were Eleven read writeup
DUNGEON - BSides Ahmedabad CTF 2021Collapsed License read writeup
DUNGEON - BSides Ahmedabad CTF 2021ECC-RSA 2 read writeup
DUNGEON - BSides Ahmedabad CTF 2021SSSS.RNG read writeup
Hack.lu CTF 2021WhatTheHecc [198]read writeup
Hack.lu CTF 2021lwsr [285]read writeup
pbctf 2021Seed Me read writeup
pbctf 2021Yet Another RSA read writeup
InCTF 2021Shell Boi [956]read writeup
UIUCTF 2021phpfuck_fixed [449]read writeup
Google Capture The Flag 2021tonality [256]read writeup
Google Capture The Flag 2021tiramisu [263]read writeup
Google Capture The Flag 2021story [249]read writeup
Google Capture The Flag 2021Pythia [173]read writeup
Google Capture The Flag 2021H1 [283]read writeup
Zh3r0 CTF V2Baby SSRF [453]read writeup
PlaidCTF 2021leaky block cipher [400]read writeup
DiceCTF 2021Lost In Your Eyes [334]read writeup
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