Sat, 19 March 2016, 02:00 UTC — Mon, 21 March 2016, 02:00 UTC 

On-line

BCTF event.

Format: Jeopardy Jeopardy

Official URL: http://bctf.xctf.org.cn/

This event's weight is subject of public voting!

Future weight: 32.14 

Rating weight: 32.14 

Event organizers 


no logo

Scoreboard

573 teams total

PlaceTeamCTF pointsRating points
1 Plaid Parliament of Pwning 5275.00064.280
2 217 4979.00046.407
3 Shellphish 3567.00032.447
4 TokyoWesterns 3525.00029.512
5 !SpamAndHex 3410.00027.205
6 Nu1L 3315.00025.555
7 FlappyPig 3016.00022.968
8 0ops 2941.00021.937
9 BambooFox 2721.00020.150
10 Dragon Sector 2660.00019.421
11 四川无声-PKAV 2570.00018.581
12 dcua 2510.00017.971
13 ASIS 2310.00016.547
14 没有一个系统是安全的 2210.00015.761
15 DuRaRaRa!! 2012.00014.402
16 scryptos 2011.00014.262
17 Never Stop Exploiting 2010.00014.137
18 p4 1960.00013.728
19 Bushwhackers 1960.00013.634
20 ROIS 1913.00013.263
21 Tasteless 1861.00012.869
22 LC↯BC 1816.00012.526
23 DeliciousHorse 1660.00011.512
24 Azure Assassin Alliance 1611.00011.155
25 SHARK 1610.00011.095
26 Batman's Kitchen 1610.00011.046
27 BabyPhD 1564.00010.720
28 Destructive Voice 1460.00010.043
29 Phish'n'Chips 1411.0009.705
30 BreakPoint 1310.0009.053
31 MV9rwGOf08 1310.0009.018
32 w0pr 1261.0008.688
33 Sigma 1210.0008.346
34 b01lers 1115.0007.739
35 Capture the Swag 1110.0007.681
36 int3pids 1110.0007.656
37 CLGT 1065.0007.358
38 Snatch The Root 1060.0007.304
39 Dawn 1060.0007.283
40 Lancet 1010.0006.957
41 dodododo 961.0006.639
42 LittleTips 960.0006.614
43 smoke leet everyday 960.0006.597
44 0x8F 960.0006.580
45 0xFA 910.0006.259
46 天枢 910.0006.243
47 KITCTF 860.0005.924
48 hxp 860.0005.909
49 ****** 815.0005.622
50 Hexpresso 815.0005.609
51 Mammon Machine 811.0005.572
52 xil.se 763.0005.267
53 Fourchette Bombe 715.0004.963
54 PwnThyBytes 710.0004.921
55 0x90r00t 710.0004.910
56 Raccoons 710.0004.900
57 WildWolf 665.0004.616
58 urandom 660.0004.575
59 0daysober 660.0004.566
60 noraneco 610.0004.252
61 TOIH 610.0004.244
62 vang1ong7ang 610.0004.235
63 squareroots 560.0003.922
64 Hanoiati 510.0003.610
65 RingZer0 Team 510.0003.602
66 SDT 510.0003.594
68 mrx 510.0003.580
69 Yahoo knows him 510.0003.573
70 Melon 510.0003.567
71 Erio 504.0003.523
72 FluxFingers 500.0003.493
73 Thanos 460.0003.243
74 XDay 460.0003.237
75 Yozakura 410.0002.927
76 irGeeks 410.0002.921
77 yakinikyuu 360.0002.611
78 Samurai 360.0002.605
79 khack40 360.0002.600
80 PiggyBird 360.0002.595
81 Singularity 360.0002.590
82 Ring4 360.0002.585
83 WatchWolf 360.0002.581
84 WISEYE 360.0002.576
85 Antarctica-momo 360.0002.572
86 AK95 360.0002.567
87 CyKOR 360.0002.563
88 9447 360.0002.559
89 VXRL 360.0002.555
90 RooterX 360.0002.551
91 Hackeriet 360.0002.547
92 hexfact0r 360.0002.543
93 DOFE 350.0002.478
94 QuokkaLight 260.0001.926
95 Ping-Mic 260.0001.922
96 宫保鸡丁 260.0001.919
97 vinamilk 260.0001.915
98 仙人球s 250.0001.851
99 United Exploit Directorate 210.0001.604
100 Tomatosalad 210.0001.601
101 IS☢LA 210.0001.598
102 No Internet Access 210.0001.595
103 Kesatria Garuda 210.0001.592
104 efiens 210.0001.589
105 covart 210.0001.586
106 Blue-Whale 210.0001.583
107 snake 210.0001.580
108 7HxzZ 210.0001.577
109 莲子百合 210.0001.574
110 zj9s.0kami 210.0001.572
111 好帽子 210.0001.569
112 n00bCTF 210.0001.566
113 Tester 210.0001.564
114 tank1st99 210.0001.561
115 Sonic_Rainboom 210.0001.559
116 TusanHomichi 210.0001.557
117 morganFr33man 210.0001.554
118 Fast Affine Projection 210.0001.552
119 QAQAQ 210.0001.550
120 Bono_iPad 210.0001.547
121 55_AA 200.0001.484
122 银河战队 200.0001.482
123 i3r0_9R3 200.0001.480
124 .elite 200.0001.478
125 55-AA 200.0001.476
126 NIS 160.0001.230
127 VeCtOr 160.0001.228
128 ISITDTU 160.0001.226
129 Cyber-1 160.0001.224
130 Execut3 160.0001.222
131 xSTF 160.0001.220
132 Securimag 160.0001.218
133 Fr0g_Fl4g 160.0001.217
134 HoT 160.0001.215
135 Vegan Zombies 160.0001.213
136 wasamusume 160.0001.211
137 Hackstangs 160.0001.209
138 participe_ctf 160.0001.208
139 isbaiws 160.0001.206
140 0x4556368625 160.0001.204
142 1up 160.0001.201
143 Magic Hat 160.0001.200
144 HackCat 160.0001.198
145 Shadow Cats 160.0001.197
146 KaisHack 160.0001.195
147 err0r-451 160.0001.194
148 r00t@b00t 160.0001.192
149 th3jackers 160.0001.191
150 Ds3c 160.0001.189
151 Come to Try Fortune 160.0001.188
152 LeetSpeak 160.0001.186
153 Back 160.0001.185
154 学生会 160.0001.184
155 Cust1607 160.0001.182
156 Invulnerable 160.0001.181
157 PeakChaos 160.0001.180
158 HackXore 160.0001.178
159 Master Ironbar 160.0001.177
160 TheGoonies 160.0001.176
161 DjigIT 160.0001.174
162 Espacio 160.0001.173
164 splarcit 160.0001.171
165 OpenToAll 160.0001.170
166 NULLify 160.0001.168
167 weekendterminator 160.0001.167
168 CooCoo 160.0001.166
170 cpaw 160.0001.164
171 ctffuntik 160.0001.163
172 omakase 160.0001.162
173 Shady.Solutions 160.0001.161
174 zongsjs 160.0001.160
175 TeamRedAce 160.0001.159
176 mau5 160.0001.157
177 sutechCTF 160.0001.156
178 aliceisdead 160.0001.155
179 Ivaniko 160.0001.154
180 dephault 160.0001.153
182 iSome 10.0000.238
183 NeOLux-C1Ph3r 10.0000.237
184 bitbitbit 10.0000.236
185 GNUnu 10.0000.235
186 PHCN 10.0000.234
187 beatles 10.0000.233
188 op.rad 10.0000.232
189 jibashiri 10.0000.231
190 Kam1nariKrowz 10.0000.230
191 None 10.0000.229
192 TenDollar 10.0000.228
193 Just Hit the Core 10.0000.227
194 CorpOfHack 10.0000.227
195 Tiger 10.0000.226
196 LosFuzzys 10.0000.225
197 DB-Time 10.0000.224
198 Bits For Everyone 10.0000.223
199 D@rk$h3ll 10.0000.222
200 HHH 10.0000.222
201 Hitch 10.0000.221
202 CTFPractice 10.0000.220
203 ByteShredders 10.0000.219
204 ffx 10.0000.218
205 FarmingSimulator2015Game.exe 10.0000.218
206 4rr0w 10.0000.217
207 波霸 10.0000.216
208 SAINTSEC 10.0000.215
209 mc_te4m 10.0000.215
210 UQAM Dank Again 10.0000.214
211 A&D 10.0000.213
212 g0tiu5a 10.0000.213
213 8-bit 10.0000.212
214 WhatTheSheep 10.0000.211
215 CTF-infinit 10.0000.210
216 0wn3r5 10.0000.210
217 xnianq 10.0000.209
218 Cat-n-Fish 10.0000.208
219 PLUS 10.0000.208
220 IngloriousMonkeys 10.0000.207
221 ALLES! 10.0000.206
222 HackingForSoju 10.0000.206
223 大王叫我来巡山 10.0000.205
224 Guardians 10.0000.204
225 9SOC 10.0000.204
226 Sanya_Bay 10.0000.203
227 FAUST 10.0000.203
228 gabbar 10.0000.202
229 Pcthon 10.0000.201
230 4diamond 10.0000.201
231 WE_0WN_Y0U 10.0000.200
232 DFCI 10.0000.199
233 ReallyNonamesFor 10.0000.199
234 r3b00+ 10.0000.198
235 KXTI_t 10.0000.198
236 wtfmehftw 10.0000.197
237 Neg9 10.0000.197
239 undefined 10.0000.195
240 小红帽 10.0000.195
241 Pwnelaide 10.0000.194
242 菜鸡 10.0000.194
243 2523@1 10.0000.193
244 eM00 10.0000.193
245 b0tch_sec 10.0000.192
246 打酱油 10.0000.192
247 amn3s1a 10.0000.191
248 Iq tracking 10.0000.191
249 LQYMGT 10.0000.190
250 popo 10.0000.189
251 WL 10.0000.189
252 crayontheft 10.0000.188
253 Internetwache 10.0000.188
254 Checkmeout 10.0000.187
255 Rosenburg Engel 10.0000.187
256 Vidar 10.0000.186
257 Avidya 10.0000.186
258 Aurora 10.0000.186
259 ghost@/bin/sh 10.0000.185
260 zjgsu_ljj 10.0000.185
261 FqTW 10.0000.184
262 objEEdump 10.0000.184
263 GlandOS 10.0000.183
264 woniu507 10.0000.183
265 shaguo 10.0000.182
266 Brutewoorse 10.0000.182
267 BITSkrieg 10.0000.181
268 zexec1 10.0000.181
269 WS5TYnBoZg== 10.0000.180
270 Alone 10.0000.180
271 CSI 10.0000.180
272 中國網警 10.0000.179
273 aaa- 10.0000.179
274 watch0ut 10.0000.178
275 websec 10.0000.178
276 X1cT34m 10.0000.177
277 周姑娘 10.0000.177
278 SUS 10.0000.177
279 213 10.0000.176
280 F4nt45i4 10.0000.176
281 nwpusec 10.0000.175
282 GetFlag 10.0000.175
283 潇洒哥 10.0000.174
284 马场理工学院 10.0000.174
285 Syclover 10.0000.174
286 ALLXss 10.0000.173
287 Vic 10.0000.173
288 千年风雅 10.0000.173
289 德玛西亚 10.0000.172
290 Cl0udShe1l 10.0000.172
291 一人打酱油 10.0000.171
292 奔跑的菜鸟 10.0000.171
293 FLASHARROW 10.0000.171
294 ClearCode 10.0000.170
295 WindSpeaker 10.0000.170
296 makehhh 10.0000.170
297 Kashasha 10.0000.169
298 桃花岛 10.0000.169
299 B216 10.0000.168
300 techworker 10.0000.168
301 yuzunzz 10.0000.168
302 怪盗鸭德 10.0000.167
303 S0uL'S Team 10.0000.167
304 Mole 10.0000.167
305 The Order 10.0000.166
306 Dark Daisy 10.0000.166
307 chinaH.L.B 10.0000.166
308 Qu3s7 10.0000.165
309 forx 10.0000.165
310 DarkEye 10.0000.165
311 SeeSea 10.0000.164
312 talentA 10.0000.164
313 Pandemonium 10.0000.164
314 队名叫什么好呢 10.0000.163
315 33°灰 10.0000.163
316 GCC 10.0000.163
317 c00kie 10.0000.162
318 安全盒子团队 10.0000.162
319 瓦罐汤 10.0000.162
320 Marchare 10.0000.161
321 Salvation 10.0000.161
322 Xp0int 10.0000.161
323 只是来打酱油的 10.0000.160
324 s3cer 10.0000.160
325 congcongcong 10.0000.160
326 N** 10.0000.160
327 vampire 10.0000.159
328 Sn0w0lf 10.0000.159
329 追风少年王二狗 10.0000.159
330 我们来打铁 10.0000.158
331 湘军 10.0000.158
332 sloth 10.0000.158
333 UCCU 10.0000.157
334 axyz 10.0000.157
335 probe 10.0000.157
336 who@mI 10.0000.157
337 New_World 10.0000.156
338 306 10.0000.156
339 314 10.0000.156
340 01dDriver 10.0000.155
341 小酱油 10.0000.155
342 drops_菜鸟 10.0000.155
343 Spirit+ 10.0000.155
344 国民革命第九路军 10.0000.154
345 xXxXxaAaAa 10.0000.154
346 2049 10.0000.154
347 527 10.0000.154
348 SWAT.ME 10.0000.153
349 aegis 10.0000.153
350 10.0000.153
351 WOLFPACK 10.0000.152
352 Phoenix 10.0000.152
353 171 10.0000.152
354 hszhsz95 10.0000.152
355 QAQ 10.0000.151
356 Zonda 10.0000.151
357 f0r9etpwd 10.0000.151
358 C521 10.0000.151
359 Attack & Defence 10.0000.150
360 zzz 10.0000.150
361 肥头队 10.0000.150
362 考前冲刺 10.0000.150
363 Ensaté 10.0000.149
364 11-Digit Prime Number 10.0000.149
365 WackMC 10.0000.149
366 Sing13D0g 10.0000.149
367 str!ngs 10.0000.149
368 The DHARMA Initiative 10.0000.148
369 Hacknam Style 10.0000.148
370 Natalia 10.0000.148
371 TWN 10.0000.148
372 coldcoders 10.0000.147
373 RTFM 10.0000.147
374 DOA 10.0000.147
375 fi 10.0000.147
376 503 10.0000.146
377 SnF 10.0000.146
378 drdr 10.0000.146
379 StratumAuhuur 10.0000.146
380 codebreakers 10.0000.146
381 RainbowUnicornAttack 10.0000.145
382 n00bsider 10.0000.145
383 Rõnins 10.0000.145
384 Knightsec 10.0000.145
385 v0rt3x 10.0000.144
386 Magos 10.0000.144
387 redalert 10.0000.144
388 oneup 10.0000.144
389 0x656d68 10.0000.144
390 Glidermed 10.0000.143
391 DioStudio 10.0000.143
392 Stack 10.0000.143
393 Vim Appreciation Society 10.0000.143
394 Shady Hats 10.0000.143
395 Juicers 10.0000.142
396 coderangers 10.0000.142
397 someone 10.0000.142
398 Registered Hex Offenders 10.0000.142
399 taurus 10.0000.141
400 warma 10.0000.141
401 Jacy 10.0000.141
402 "monads" 10.0000.141
403 ckm 10.0000.141
404 HPUSec 10.0000.140
405 CAT-Security 10.0000.140
406 smack 10.0000.140
407 kall 10.0000.140
408 buscoequipo 10.0000.140
409 Ballmer cliff 10.0000.140
410 soma 10.0000.139
411 艾欧尼亚 10.0000.139
412 Crazy8 10.0000.139
413 lastbyte 10.0000.139
414 devilstep 10.0000.139
415 siny 10.0000.138
416 keywee__ 10.0000.138
417 专业打酱油 10.0000.138
418 剑三又出688披风了。。 10.0000.138
419 Yamagi.com 10.0000.138
420 Insanity 10.0000.137
421 KINdred 10.0000.137
422 我不想说啥 10.0000.137
423 0x7F 10.0000.137
424 Marlboro 10.0000.137
425 hy00un 10.0000.137
427 Null Space Labs 10.0000.136
428 netAir 10.0000.136
429 RICKY 10.0000.136
430 sonshi 10.0000.136
432 TheDogz 10.0000.135
433 hackher 10.0000.135
434 NUSGreyhats 10.0000.135
435 AopzpzJ 10.0000.135
436 ScathingEyes 10.0000.135
437 OPT 10.0000.134
438 kingdom017 10.0000.134
439 DtR 10.0000.134
440 Cole4 10.0000.134
441 bobo 10.0000.134
442 Justin Bieber 10.0000.134
443 hatisan 10.0000.133
444 Cyber_Squad 10.0000.133
447 K17 10.0000.133
449 403 10.0000.133
450 h2o 10.0000.132
451 ctf08 10.0000.132
453 MeePwn 10.0000.132
454 suou03 10.0000.132
456 teester 10.0000.131
458 0x8BadF00d 10.0000.131
459 redsky 10.0000.131
460 fun1234 10.0000.131
461 MichelCode 10.0000.131
462 Hawkins 10.0000.130
463 if_true_then 10.0000.130
464 Cafelinux 10.0000.130
465 n000b 10.0000.130
466 ZeroAccess 10.0000.130
467 marvel 10.0000.130
468 xor %rax, %rax 10.0000.130
469 deadcoder 10.0000.129
470 ####### 10.0000.129
471 KerKerYuan 10.0000.129
472 Cache_Crook 10.0000.129
473 Marlboro1 10.0000.129
474 azneye 10.0000.129
475 MarlboroOne 10.0000.129
476 mollaa 10.0000.128
477 adunna 10.0000.128
478 Free The Mallocs 10.0000.128
479 CyberOps 10.0000.128
480 Attackers 10.0000.128
481 someone1 10.0000.128
482 HIKARI 10.0000.128
483 rtmcx 10.0000.127
484 Indogo02 10.0000.127
485 team13 10.0000.127
486 has_NOTHING_todo 10.0000.127
487 loneSnowflake 10.0000.127
488 bi0s 10.0000.127
489 vimvaders 10.0000.127
490 zondaa 10.0000.127
491 bradp1tt 10.0000.126
492 ICEPINEAPPLE 10.0000.126
493 rutrack 10.0000.126
494 MojoMaster 10.0000.126
495 Plann 10.0000.126
496 3Sh4 10.0000.126
497 At Least We're Pretty 10.0000.126
498 y0nko 10.0000.125
499 Soy Sauce 10.0000.125
500 HeXA 10.0000.125
501 testers 10.0000.125
502 testers2 10.0000.125
503 Desiprox-Team 10.0000.125
504 Team BASH 10.0000.125
505 Und3rSt4nd 10.0000.125
506 vanhelsing 10.0000.124
507 Dokko 10.0000.124
508 jinja 10.0000.124
509 BU 10.0000.124
510 vanhelsing1 10.0000.124
511 chuck14 10.0000.124
512 crtl 10.0000.124
513 Wolf_Pack 10.0000.124
514 MMM 10.0000.123
515 ECX Inc. 10.0000.123
516 Playfair2k16 10.0000.123
517 f0r9et 10.0000.123
518 Udsu-ctf-first 10.0000.123
519 CbeTeam 10.0000.123
520 RPISEC 10.0000.123
521 SherlockInOurHolmes 10.0000.123
522 JAV 10.0000.122
523 REU 10.0000.122
524 KUZUMOCHI 10.0000.122
525 555+ 10.0000.122
526 Ucorn1 10.0000.122
527 crackatoa 10.0000.122
528 M4RI0 10.0000.122
529 JohnDoe 10.0000.122
530 d4rk* 10.0000.122
531 brucel33t 10.0000.121
532 no_team_name 10.0000.121
533 yodog 10.0000.121
534 Inc 10.0000.121
535 ByteOfLatte 10.0000.121
536 EPG 10.0000.121
537 vetsin 10.0000.121
538 Templarios 10.0000.121
540 appBana 10.0000.120
541 skinsosoft 10.0000.120
542 biffsquad 10.0000.120
543 Ronald Pagan 10.0000.120
544 arkamaj 10.0000.120
545 Crimson_Agents 10.0000.120
546 iridescent 10.0000.120
547 0xdeadbeef 10.0000.120
548 uiuctf 10.0000.120
549 Renee 10.0000.119
550 Hawks 10.0000.119
551 asdf 10.0000.119
552 randomplayer 10.0000.119
553 hhhhh 10.0000.119
554 lintile 10.0000.119
555 hAIXer 10.0000.119
556 Ba Sing Sec 10.0000.119
557 DZ 10.0000.119
558 SweCopyFloppy 10.0000.119
559 0xc0ffee 10.0000.118
560 Jeramy 10.0000.118
561 GameOver 10.0000.118
562 Cuse 10.0000.118
563 moo 10.0000.118
564 d4rkc0de 10.0000.118
565 ch1nch1lla 10.0000.118
566 meloholic 10.0000.118
567 juncheol 10.0000.118
568 AiO 10.0000.118
569 AiA 10.0000.117
570 TAT 10.0000.117
571 CLAY 10.0000.117
572 DannyJay 10.0000.117
573 Ghost Sec Team 10.0000.059
574 porpeeranut 10.0000.058
575 BPlayer 10.0000.058
576 Knight_riders 10.0000.058
577 0x737973 10.0000.058
578 Sexypasta 10.0000.058
579 LoneViking 10.0000.058
580 Pes planovalgus 10.0000.058
581 ACTU 10.0000.058
582 TheKillingTime 10.0000.058
583 marsnoobz 10.0000.058
584 Karpuz 10.0000.058
585 tempo 10.0000.058
586 bobsburgers 10.0000.058
587 bdraff 10.0000.058
588 BadBurrito 10.0000.058
KT. – March 15, 2016, 4:20 p.m.

Yep, the CTF is only 3 days away and there is no CTF description here and the CTF website is not up-to-date at all.


binerdd – March 16, 2016, 9:34 a.m.

Now the updated site is online


Dor1s – March 18, 2016, 10:03 a.m.

Registration is broken: {"msg":"invalid post param: uid","key":"uid","err":"param"}


Dor1s – March 18, 2016, 10:16 a.m.

Cannot register even through an account at XCTF. Google translates says this at XCTF page:

Participation BCTF 2016
XCTF-Time as XCTF League standings and statistics management platform. Each race game platform independence.
Before the game at 20:00 on the 1st before registration in XCTF-Time and join a team of players can participate in the contest.
Players can view account information entry through this page. Entry information will be released before the game at 23:00 on the 1st in XCTF-Time, please be patient.
No XCTFTIME your entry information.
Please visit http://bctf.cn/ participate in the contest.
If you have questions, please mail or through sub-races IRC contact the administrator.


warchantua – March 23, 2016, 2:20 p.m.

Could somebody write a write-up for task "Hyper RSA / 500"?


Pharisaeus – March 24, 2016, 9:30 a.m.

@warchantua there was nothing interesting there, just very tedious and time-consuming calculations. It was a meet-in-the-middle attack. You could recover P1, P2 and Q1, Q2 from the server by sending some E (eg. 3, and 65537) values and getting D1 and D2 values for them (this you could do with https://sourceforge.net/projects/rsaconverter/). And then you had to encrypt the given plaintext single time via RSA for all possible E values (up to 9 digit numbers), and decrypt corresponding ciphertext for all D values (so you again iterate over all possible E values up to 9 digit numbers and calculate D value for it). This way you have a very long (gigabytes long...) list of single RSA encrypted plaintext and single RSA decrypted ciphertext and there should be the same row in both of them. This row gives you E1, and E2 used by the server, which you can then use to decrypt the flag.


factoreal – March 28, 2016, 2:53 a.m.

Please submit scoreboard to CTFTime, thanks