Mon, 06 June 2022, 12:00 UTC — Fri, 10 June 2022, 12:00 UTC 

On-line

Grey Cat The Flag event.

Format: Jeopardy Jeopardy

Official URL: https://ctfd.nusgreyhats.org/

This event's future weight is subject of public voting!

Future weight: 24.50 

Rating weight: 24.50 

Event organizers 

Grey Cat The Flag is a jeopardy style CTF organized by NUS Greyhats (https://nusgreyhats.org/) and National Cybersecurity R&D Labs (https://ncl.sg/) in June.

This CTF is open to all students studying in Singapore (Sec/JC/Poly/Uni) + NSFs as well as international teams.

However, only local students & NSFs can qualify for the in-person final round to get our prizes! Local teams who wish to be eligible for the finals must sign up at https://ctf.nusgreyhats.org/reg with a maximum team size of 3.

International or casual teams can sign up on the CTF platform directly at https://ctfd.nusgreyhats.org/

For fairness, please also play in teams of 3.

Discord Server: https://discord.gg/d9wbXEP2wN

Infra sponsored by goo.gle/ctfsponsorship

Platinum Sponsor: Cyber Security Agency of Singapore

Gold Sponsor: GuardRails, Acronis, Ensign

Prizes

Only Singaporean students teams are eligible for prizes.

Champion $9000
2nd $6000
3rd $3000
4th-10th $450 each

Top 10 Writeups
(for specific challenges) $30 each
First Bloods
(for 10 specific challenges) $30 each

Scoreboard

455 teams total

PlaceTeamCTF pointsRating points
1 Stranglehold (SG) 10951.00049.000
2 AverageCryptoEnjoyers 10951.00036.750
3 NUSHmallows 10453.00031.553
4 Social Engineering Xperts 9958.00028.403
5 bonked (SG) 9013.00025.064
6 catssg (SG) 8542.00023.194
7 Gameboys (SG) 8044.00021.496
8 {h3lL0_W0r1d} (SG) 7617.00020.104
9 SEEggsy (SG) 7592.00019.707
10 ItzyBitzySpider 7531.00019.299
11 Gyasn (SG) 7261.00018.472
12 CSW (SG) 7084.00017.890
13 :pensive: (SG) 6768.00017.026
14 VMP (SG) 6169.00015.552
15 sad (SG) 6019.00015.099
16 /bad 5565.00013.981
17 League of Extraordinary Zeyu2001s 4611.00011.757
18 SEEnoTouch 4502.00011.433
19 1/cosd 4501.00011.359
20 0x003D5448 (SG) 4341.00010.937
21 DPD (SG) 4329.00010.852
22 『  』 4291.00010.714
23 rabbitsthecat 4272.00010.623
24 🗿 Sigma Grinders 🗿 (SG) 3972.0009.907
25 Joseph 3809.0009.502
26 CatIRL (SG) 3669.0009.151
27 Team Maki Shijo (SG) 3440.0008.604
28 EggRoll 3171.0007.969
29 SSSSSSSSSSSSSSSSSSSSSDDDDDD (SG) 3024.0007.610
30 Pwning Officers 2871.0007.240
31 Vindicator 2748.0006.938
32 n03tAck 2699.0006.804
33 mikoan 2675.0006.727
34 dad (SG) 2528.0006.376
35 The Blue Team 2452.0006.186
36 xiao hai zis (SG) 2384.0006.014
37 flag{}___Orz 2369.0005.962
38 AFTW (SG) 2319.0005.833
39 BIT CRIMINALS 2270.0005.707
40 CreateRemoteThread 2169.0005.465
41 AI lmao (SG) 2159.0005.428
42 sHrACK (SG) 2151.0005.396
43 RVCTF 0x22 (SG) 2132.0005.340
44 CSALab_Sec 2113.0005.284
45 CGP Grey (SG) 2085.0005.209
46 Flareon 1961.0004.920
47 me_irl 1916.0004.808
48 Sanitäter (SG) 1888.0004.734
49 Grey Meow (SG) 1865.0004.672
50 2++ (SG) 1865.0004.662
51 ThreeStrikes 1864.0004.651
52 flag_the_catch (SG) 1850.0004.610
53 x6e.x65.x78.x75.x73 1836.0004.570
54 B3 (SG) 1629.0004.098
55 p4wnWAT 1615.0004.059
56 Solo Leveling 1565.0003.939
57 OnlyFeet 1525.0003.842
58 etc2020 (SG) 1465.0003.700
59 beefoverflow 1415.0003.581
60 Team Ewok (SG) 1400.0003.540
61 LOLZ 1379.0003.487
62 bonk (SG) 1371.0003.462
63 DaiGurrenDan 1365.0003.443
64 scuffed (SG) 1353.0003.410
65 Wildcard (SG) 1327.0003.346
66 ylz 1315.0003.313
67 ÍèÒ àÃÒ¡ÓÅѧáÎç¤ àÃÒ¨ÐáÎç¤ (SG) 1315.0003.308
68 ricecake 1315.0003.302
69 RBF (SG) 1292.0003.246
70 My Little Trojan (SG) 1279.0003.211
71 Lonez 1275.0003.198
72 CyberCat 1215.0003.059
73 CTF.SG 1211.0003.045
74 CyberSpace 1154.0002.913
75 not greycats (SG) 1154.0002.908
76 RainbowHash (SG) 1144.0002.882
77 NanomachinesSon (SG) 1134.0002.855
78 FoundSatis (SG) 1054.0002.672
79 Martial_Law_Enforcer 1002.0002.552
80 JTKimager (SG) 960.0002.454
81 teamfailures (SG) 923.0002.367
82 clogs 910.0002.335
83 kanon 904.0002.318
84 ice-cream truck 904.0002.314
85 CyberSecurityPak 904.0002.311
86 meow meow (SG) 904.0002.307
87 VnC 904.0002.304
88 bread (SG) 873.0002.232
89 sean fanclub (SG) 871.0002.224
90 Delusions of Grandeur 838.0002.147
91 Lyutoon 837.0002.142
92 Scattered (SG) 796.0002.047
93 watevr 788.0002.026
94 whereIsFlag 773.0001.990
95 g1 773.0001.987
96 Pr(win)=0 (SG) 752.0001.938
97 Alpha Wolves (SG) 752.0001.935
98 (●ω●) (SG) 746.0001.919
99 ri5e 734.0001.890
100 oh_fish 719.0001.854
101 ifs study gang (SG) 702.0001.813
102 Happydays 631.0001.652
103 flag (SG) 631.0001.650
104 flag pole (SG) 631.0001.647
105 acdwas 619.0001.618
106 aspireandgrow 581.0001.531
107 Testing 581.0001.529
108 d4rkn19ht 573.0001.509
109 CyberWolf 571.0001.502
110 oscarT 560.0001.476
111 Anonymous (SG) 538.0001.424
112 ATLAS 531.0001.407
113 andser612345 521.0001.382
114 Meow Meow I'm a Cow (SG) 502.0001.338
115 not smurfing 500.0001.332
116 d0UBleW 500.0001.330
117 Murr~~ (SG) 500.0001.328
118 dota_st 491.0001.306
119 DDD123 484.0001.289
120 pwner 456.0001.224
121 _temp 456.0001.223
122 tlue 456.0001.221
123 TeamHalfDay (SG) 450.0001.206
124 inotsmort (SG) 450.0001.204
125 Neo Turf Masters (SG) 450.0001.203
126 Asset Management (SG) 450.0001.201
127 POLITE_JUICE 450.0001.200
128 BITC 438.0001.171
129 Jolly Roger Insecurity 438.0001.170
130 Dd05 431.0001.153
131 sleeperagents 431.0001.151
132 fzhshzh (SG) 400.0001.081
133 OneRain233 400.0001.079
134 kkr 400.0001.078
135 orans 400.0001.076
136 Security Meter 400.0001.075
137 ProximityToast 400.0001.074
138 BCL1 400.0001.072
139 Caikias (SG) 400.0001.071
140 mzw (SG) 350.0000.958
141 freelance 350.0000.957
142 SDR (SG) 350.0000.956
143 Yorm (SG) 350.0000.954
144 Reload (SG) 350.0000.953
145 H4ck0pp 350.0000.952
146 HelloWorld (SG) 350.0000.951
147 Hw33f4nclu6 (SG) 350.0000.950
148 idk (SG) 350.0000.949
149 Micke 350.0000.947
150 [email protected] 350.0000.946
151 DoR 321.0000.880
152 EnKai 321.0000.879
153 Aeteesea (SG) 300.0000.831
154 SZL (SG) 300.0000.830
155 H3re2G3tRek7 (SG) 300.0000.829
156 NOOTOOOT 300.0000.828
157 Optimvs 300.0000.827
158 taurus 300.0000.826
159 ZakuroSoda 300.0000.825
160 orangeeeeee 300.0000.824
161 Ducky (SG) 300.0000.823
162 one-shot 300.0000.822
163 hack2pizza 300.0000.821
164 Panda (SG) 300.0000.821
165 Last Place (SG) 300.0000.820
166 brooo 250.0000.707
167 FAST (SG) 250.0000.706
168 TakeOutYey (SG) 250.0000.705
169 B00T2R00T 250.0000.704
170 [KOR] RedSec 250.0000.703
171 0xsologameteam 250.0000.703
172 HSMS (SG) 250.0000.702
173 ramen 250.0000.701
174 KXTI_UwU 250.0000.700
175 T34M_M4CR0S 250.0000.699
176 catsro (SG) 250.0000.699
177 undefined 250.0000.698
178 Pingu ʕ •ᴥ•ʔ (SG) 250.0000.697
179 0ldd4ve 250.0000.696
180 Skalman 250.0000.695
181 4fun 250.0000.695
182 Narix_ 250.0000.694
183 Ov3rH4ck 250.0000.693
184 squishyHumans (SG) 250.0000.692
185 daidninwaifanfwainwfa 250.0000.692
186 Shark (SG) 250.0000.691
187 AntiAnti 250.0000.690
188 S0l0N00b 250.0000.690
189 Nepnep 250.0000.689
190 justforfunzies 250.0000.688
191 secr3t 250.0000.688
192 r4!nb0w5 250.0000.687
193 Kalindrome 250.0000.686
194 Eldoofus 231.0000.643
195 LastPlace (SG) 200.0000.573
196 @n+zSolo (SG) 200.0000.572
197 Shady Skorpions (SG) 200.0000.572
198 Shopsiuu (SG) 200.0000.571
199 grey dinocat (SG) 200.0000.571
200 Avengers (SG) 200.0000.570
201 sl0v4kn00b5 200.0000.569
202 Exterminator821 200.0000.569
203 thesolos 200.0000.568
204 ExcelsiorSG 200.0000.568
205 TacoCatto (SG) 200.0000.567
206 GitFlag (SG) 200.0000.566
207 versa 200.0000.566
208 CyberWolf1 200.0000.565
209 _r4nd0m_ 200.0000.565
210 EndWalker 200.0000.564
211 Twisted427 200.0000.564
212 randomteamname 200.0000.563
213 cybersecurity_rejects 200.0000.562
214 Yes 200.0000.562
215 Cr4zyThurs 200.0000.561
216 Studeh 200.0000.561
217 Nerds of Mayhem 181.0000.518
218 CatsAndDogs (SG) 150.0000.448
219 SYF (SG) 150.0000.447
220 Ite CW 2022 (SG) 150.0000.447
221 regulaburger 150.0000.446
222 Hidiot 150.0000.446
223 iDunHaveATeamToPlayWith 150.0000.445
224 Upsize (SG) 150.0000.445
225 w3b_nEWbies 150.0000.444
226 limaa 150.0000.444
227 limyanhong (SG) 150.0000.444
228 Random:D 150.0000.443
229 One Direction (SG) 150.0000.443
230 5ca5dd 150.0000.442
231 Pligonstein 150.0000.442
232 Bin 150.0000.441
233 apt33 150.0000.441
234 gabe 150.0000.440
235 PwnProphecy 150.0000.440
236 decipher 150.0000.439
237 n0n 150.0000.439
238 RVCTF{HYDRA} (SG) 150.0000.439
239 Liess 150.0000.438
240 Bulletproof 150.0000.438
241 upgradeRole 150.0000.437
242 Jjamppong (SG) 150.0000.437
243 Onetime 150.0000.436
244 dGhlIGJpZyBtYW4gZnJlZGRpZQo= 150.0000.436
245 XOR-syst 150.0000.436
246 Fr3shW4t3r 150.0000.435
247 4k3l4rr3 150.0000.435
248 Alexius 150.0000.434
249 firesale 150.0000.434
250 Farming Simulator Nextgen 150.0000.434
251 Black Eyed Elites 150.0000.433
252 TOH BRO (SG) 150.0000.433
253 FPTU EThical Hackers Club 150.0000.432
254 Haoyang Lu 150.0000.432
255 txph 150.0000.432
256 1nVad3R5 150.0000.431
257 beginners 150.0000.431
258 handsome_b0y 150.0000.431
259 laptopoutofbattery (SG) 150.0000.430
260 dondondonki (SG) 150.0000.430
261 octokorok 150.0000.429
262 [email protected] 150.0000.429
263 pabloneruda 100.0000.317
264 The SV 100.0000.317
265 DuckG4ng 100.0000.316
266 KXTI_ASE 100.0000.316
267 zzzzzz 100.0000.315
268 QcBgagKrtexonZyf 100.0000.315
269 OMGGG 100.0000.315
270 mittsu 100.0000.314
271 watch 100.0000.314
272 AlbanianC00kie 100.0000.314
273 XBin 100.0000.313
274 asutero 100.0000.313
275 Homiezone (SG) 100.0000.313
276 Gru (SG) 100.0000.312
277 tabi 100.0000.312
278 lplusratio 100.0000.312
279 THE WORLD!!! 100.0000.312
280 Fep 100.0000.311
281 nascopie 100.0000.311
282 1 100.0000.311
283 [Red Cadets] P0z3rs 100.0000.310
284 9ouuuuuub3aaaaaaaaaaaaa 100.0000.310
285 GameStonk 100.0000.310
286 B3G1NN3R 100.0000.309
287 ghiro 100.0000.309
288 wgpsec 100.0000.309
289 justforfun 100.0000.308
290 Wibu_l337 100.0000.308
291 Jackals (SG) 100.0000.308
292 Fury's Edge 100.0000.308
293 conqueror 100.0000.307
294 Fruity Nuts 100.0000.307
295 LoLoLoshka 100.0000.307
296 p3rplex3d 100.0000.306
297 SubUrban 100.0000.306
298 sant268-solo 100.0000.306
299 Hackerman (SG) 100.0000.306
300 gun 100.0000.305
301 PatagoniaHack 100.0000.305
302 Cy83rTr0n 100.0000.305
303 nigaman 100.0000.305
304 StormTroopers 100.0000.304
305 xDiste 100.0000.304
306 Qushchi 100.0000.304
307 natulab 100.0000.304
308 Systers 100.0000.303
309 Bingo 100.0000.303
310 onemanband 100.0000.303
311 memyselfandi 100.0000.303
312 MAHRUS TEAM 100.0000.302
313 zzz 100.0000.302
314 Mario 100.0000.302
315 eeee 100.0000.302
316 newbie 100.0000.301
317 blu3moon 100.0000.301
318 DVCool 100.0000.301
319 WhiteRats 100.0000.301
320 B3gul4 100.0000.300
321 WeAre 100.0000.300
322 h3x 100.0000.300
323 gruf 100.0000.300
324 asmos 100.0000.299
325 Delta 100.0000.299
326 atman 100.0000.299
327 Stains 100.0000.299
328 cyber_ninja 100.0000.298
329 Grim Labs 100.0000.298
330 Excalibur 50.0000.186
331 th3-in51ghtful-0n3s 50.0000.186
332 FR13NDS TEAM 50.0000.186
333 RNJ (SG) 50.0000.185
334 Metaspoiled 50.0000.185
335 APT-4274 (SG) 50.0000.185
336 Houston 50.0000.185
337 SSAFuze 50.0000.185
338 AngryMeowMeowNoises (SG) 50.0000.184
339 RVCTF newbies (SG) 50.0000.184
340 vein 50.0000.184
341 Duelist (SG) 50.0000.184
342 [email protected] 50.0000.183
343 CURS<R 50.0000.183
344 runtime error (SG) 50.0000.183
345 kgrzk2 50.0000.183
346 ne0n 50.0000.183
347 AG 50.0000.182
348 Circus (SG) 50.0000.182
349 NuevaBlueHats 50.0000.182
350 Pot 50.0000.182
351 hog 50.0000.182
352 vinayk20025 50.0000.181
353 oneshot 50.0000.181
354 RVCTF_Meongussy (SG) 50.0000.181
355 CyberUwU 50.0000.181
356 Do_I_Know_You? 50.0000.181
357 COPYP4STA 50.0000.180
358 Kk 50.0000.180
359 n9ahbej 50.0000.180
360 cybercrew 50.0000.180
361 OG Decisions (SG) 50.0000.180
362 Hackers 50.0000.180
363 David 50.0000.179
364 1753c 50.0000.179
365 mrx 50.0000.179
366 DDLJ 50.0000.179
367 beerpwn 50.0000.179
368 patate 50.0000.178
369 KXTI_qu4ckZ 50.0000.178
370 Bro? 50.0000.178
371 Digital Dragons 50.0000.178
372 Encient 50.0000.178
373 anderSONS (SG) 50.0000.178
374 dominate1090 50.0000.177
375 debug 50.0000.177
376 Cyb3r P4tr10t1c 50.0000.177
377 PracticeTeam001 50.0000.177
378 WTS (SG) 50.0000.177
379 abcd123 50.0000.177
380 Noob_Hackers 50.0000.176
381 nosmokingops 50.0000.176
382 ardririy 50.0000.176
383 cilantro 50.0000.176
384 broccoli 50.0000.176
385 BlazerKun 50.0000.175
386 JUS7_4N63L 50.0000.175
387 76cm 50.0000.175
388 aak 50.0000.175
389 CatTheMouse 50.0000.175
390 mafia_pb_ 50.0000.175
391 flag connoisseurs 50.0000.175
392 pika 50.0000.174
393 RooterX 50.0000.174
394 hwaCHOKE (SG) 50.0000.174
395 V4n4d1um 50.0000.174
396 573918 50.0000.174
397 team_rocket 50.0000.174
398 LuckyLuna 50.0000.173
399 first time 50.0000.173
400 omen 50.0000.173
401 GaneshVishwanath 50.0000.173
402 The great 50.0000.173
403 2003 50.0000.173
404 tmp 50.0000.173
405 B0nk3rZ 50.0000.172
406 undercover 50.0000.172
407 $#4$#1 50.0000.172
408 Mama_ewe_5_minut 50.0000.172
409 posix 50.0000.172
410 immerzen 50.0000.172
411 pntIO 50.0000.171
412 Blue7eam 50.0000.171
413 edisc_team 50.0000.171
414 REHEroadchick 50.0000.171
415 Sechack 50.0000.171
416 FF9 50.0000.171
417 H4KR5_F0R3V3R 50.0000.171
418 s4ky 50.0000.170
419 Rudrakshacker 50.0000.170
420 Pa0x73cal 50.0000.170
421 Cyb3r_Warr10r 50.0000.170
422 ama 50.0000.170
423 realwololo 50.0000.170
424 room2042 50.0000.170
425 wolf 50.0000.170
426 Mikey 50.0000.169
427 Th3Doctor 50.0000.169
428 Weak_Potato 50.0000.169
429 ckc9759 50.0000.169
430 TWe1v3 50.0000.169
431 toVALHall 50.0000.169
432 NiTR0 50.0000.169
433 ioo 50.0000.168
434 r/LearnCTF 50.0000.168
435 One_Piece 50.0000.168
436 wedabbs 50.0000.168
437 sage23 50.0000.168
438 Irondude 50.0000.168
439 NULL Life 50.0000.168
440 0xL4ugh 50.0000.168
441 yesyes 50.0000.167
442 th31nk 50.0000.167
443 Quasar 50.0000.167
444 Delogrander 50.0000.167
445 # 50.0000.167
446 neodemon 50.0000.167
447 Demon 50.0000.167
448 IsolatingBeforeItWasCool 50.0000.167
449 Whatever (SG) 50.0000.166
450 s010 50.0000.166
451 4y4m_je 50.0000.166
452 X-H4ck3r%00 50.0000.166
453 x_god 50.0000.166
454 sfsdf 50.0000.166
455 11111 50.0000.083
MAFIA_PBJune 7, 2022, 10:02 a.m.

5e4d4fa11b340faa4e9216d83ddb28f6


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