-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathchallenges-category-5.html
510 lines (510 loc) · 18.9 KB
/
challenges-category-5.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<title>
Challenges : IrisCTF 2023 - CTF fun for hackers of all skill levels
</title>
<meta content="A fun, lighthearted, and educational 48-hour online CTF aimed towards hackers of all levels. Takes place the first full Friday-to-Sunday weekend every year." name="description"/>
<meta content="" name="author"/>
<meta content="/static/img/favicon.png" property="og:image">
<link href="/static/img/favicon.png" rel="icon" type="image/png"/>
<link href="/static/theme.css-v-1.3.0r5.css" rel="stylesheet"/>
<script src="/static/theme_min.js">
</script>
</meta>
</head>
<body>
<div id="navbar">
<a href="/">
<img id="navbar-logo" src="/static/img/logo_navbar.png"/>
</a>
<div id="navbar-buttons">
<a href="/home.html">
Home
</a>
<a class="active" href="/challenges.html">
Challenges
</a>
<a href="/scoreboard.html">
Scoreboard
</a>
<a href="/profile.html">
</a>
<form action="/api" method="post">
</form>
</div>
</div>
<div id="body-content">
<div class="pre-category-name">
Challenge category:
</div>
<div class="category-name typewriter">
Radio Frequency
</div>
<div style="display:flex; flex-wrap:wrap">
<div class="decorator-square-container" style="transform: rotate(270deg)">
<div class="decorator-square-component" style="background-color:#009927">
</div>
<div class="decorator-square-component title-decorator-gray">
</div>
<div class="decorator-square-component decorator-square-icon" style="background-image: url('/static/img/icons/arrow.png');background-size: 16px;filter:invert(1);">
</div>
</div>
<a class="btn-solid btn-solid-warning" href="challenges-category-Binary+Exploitation.html" style="margin:0px 8px 8px 0px">
Binary Exploitation
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Cryptography.html" style="margin:0px 8px 8px 0px">
Cryptography
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Forensics.html" style="margin:0px 8px 8px 0px">
Forensics
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Miscellaneous.html" style="margin:0px 8px 8px 0px">
Miscellaneous
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Networks.html" style="margin:0px 8px 8px 0px">
Networks
</a>
<a class="btn-solid btn-solid-warning active" href="challenges-category-Radio+Frequency.html" style="margin:0px 8px 8px 0px">
Radio Frequency
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Reverse+Engineering.html" style="margin:0px 8px 8px 0px">
Reverse Engineering
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Web+Exploitation.html" style="margin:0px 8px 8px 0px">
Web Exploitation
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Welcome.html" style="margin:0px 8px 8px 0px">
Welcome
</a>
</div>
<div style="margin-bottom: 8px">
</div>
<div class="card">
<div class="card-header">
<div style="display:flex">
<a href="challenge-id-14.html">
babyrf 1
</a>
<div class="challenge-points">
<img src="/static/img/icons/flag.png"/>
496 Points
</div>
</div>
<small>
</small>
</div>
<div class="card-content">
<p>
Welcome to the world of radio frequency! Before we give you real-life raw I/Q files and let you start hacking protocols, let's make sure you understand and can show basic competency in the fundamentals.
</p>
<p>
</p>
<p>
Note: challenges in this category are gated. Completion of babyrf 1 will unlock babyrf 2, and completion of babyrf 2 will unlock all the challenges in the RF category.
</p>
<p>
</p>
<p>
--- Hint ---
</p>
<p>
If you're still struggling with babyrf1 and begging for a sine,
</p>
<p>
Look at the data you've unpickled and then you'll be fine.
</p>
<p>
Digital cannot capture infinitely as much as analog a point,
</p>
<p>
So instead we have many samples discretely disjoint.
</p>
<p>
But one should look to see if they can recover analog waves that be
</p>
<p>
And once you find out then you'll realize how easy this challenge is to see.
</p>
<div style="margin-top:8px; display:flex; flex-wrap: wrap">
<a href="https://cdn.discordapp.com/attachments/1056103369695047750/1057165461269262426/samples.zip" style="text-decoration:none; margin-right:8px; margin-bottom:8px" target="_blank">
<div class="tag tag-inline btn-solid btn-solid-link" style="margin-bottom:0px">
<img src="/static/img/icons/package.png" style="width:20px; height:20px; margin-right:8px">
samples.zip
</img>
</div>
</a>
</div>
<div>
<div class="tag tag-inline">
<img src="/static/img/icons/info.png" style="width:20px; height:20px; margin-right:8px">
<b style="margin-right:8px">
Hint!
</b>
<p>
The given data is pickled. This is not a part of the challenge. This is the standard way to marshall data in Python. You should unmarshall the data in the pickles.
<a href="https://docs.python.org/3/library/pickle.html">
https://docs.python.org/3/library/pickle.html
</a>
</p>
</img>
</div>
<div class="tag tag-inline">
<img src="/static/img/icons/info.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
Hint!
</b>
<p>
Please do not play the pickle in VLC.
</p>
</div>
</div>
<div class="tag tag-inline" style="margin-bottom:0px">
<img src="/static/img/icons/user.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
By:
</b>
skat
</div>
</div>
</div>
<div class="card">
<div class="card-header">
<div style="display:flex">
<a href="challenge-id-15.html">
babyrf 2
</a>
<div class="challenge-points">
<img src="/static/img/icons/flag.png"/>
499 Points
</div>
</div>
<small>
</small>
</div>
<div class="card-content">
<p>
Great job with babyrf 1! But what do we do if we have a really long string of 1s or a really long string of 0s? What kind of problem do we run into, and what kinds of solutions are there?
</p>
<p>
</p>
<p>
Note: challenges in this category are gated. Completion of babyrf 2 will unlock all the challenges in the RF category.
</p>
<div style="margin-top:8px; display:flex; flex-wrap: wrap">
<a href="https://cdn.discordapp.com/attachments/1056103369695047750/1057239039981396018/samples.zip" style="text-decoration:none; margin-right:8px; margin-bottom:8px" target="_blank">
<div class="tag tag-inline btn-solid btn-solid-link" style="margin-bottom:0px">
<img src="/static/img/icons/package.png" style="width:20px; height:20px; margin-right:8px">
samples.zip
</img>
</div>
</a>
</div>
<div>
<div class="tag tag-inline">
<img src="/static/img/icons/info.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
Hint!
</b>
<p>
Once you finish babyrf1, you can very easily finish babyrf2 building off of that same codebase.
</p>
</div>
<div class="tag tag-inline">
<img src="/static/img/icons/info.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
Hint!
</b>
<p>
If I sent a really long string of 0s via radio... I would have no idea how many 0s I actually sent! I wonder if there's some way to solve this without needing an additional clock signal, almost like a signal that could clock itself.
</p>
</div>
<div class="tag tag-inline">
<img src="/static/img/icons/info.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
Hint!
</b>
<p>
Part 2's encoding scheme is a very standard scheme first created by IBM in 1956 by Bryon E. Phelps. It is not inherently self-clocking, but probabilistically achieves the same solution at lower precisions.
</p>
</div>
</div>
<div class="tag tag-inline" style="margin-bottom:0px">
<img src="/static/img/icons/user.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
By:
</b>
skat
</div>
</div>
</div>
<div class="card">
<div class="card-header">
<div style="display:flex">
<a href="challenge-id-20.html">
babyrealrf
</a>
<div class="challenge-points">
<img src="/static/img/icons/flag.png"/>
500 Points
</div>
</div>
<small>
</small>
</div>
<div class="card-content">
<p>
Great job completing those babyrf challenges earlier. Now, we're moving from the theoretical domain into the real world! Let's get you started with real world RF.
</p>
<p>
</p>
<p>
My buddy sent me this file the other day of some signals he recorded. We think it holds the flag, but we're not sure what kind of file this is, nor do we have any idea how to open it! Do you think you could get the flag for us?
</p>
<p>
</p>
<p>
<strong>
Important: do not attempt to retransmit any given transmissions unless you know what you are doing. Always check your local laws and legislations before you transmit. In the United States, unauthorized transmission outside of certain frequency bands is illegal and can even be considered a felony offense in some cases. Radio frequency is cool, but don't get in trouble!
</strong>
</p>
<div style="margin-top:8px; display:flex; flex-wrap: wrap">
<a href="https://cdn.discordapp.com/attachments/1056103369695047750/1057626996030578749/sample.zip" style="text-decoration:none; margin-right:8px; margin-bottom:8px" target="_blank">
<div class="tag tag-inline btn-solid btn-solid-link" style="margin-bottom:0px">
<img src="/static/img/icons/package.png" style="width:20px; height:20px; margin-right:8px">
sample.zip
</img>
</div>
</a>
</div>
<div>
<div class="tag tag-inline">
<img src="/static/img/icons/info.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
Hint!
</b>
<p>
Try learning tools that real radio hackers use. There are 2 major ones that we all use!
</p>
</div>
</div>
<div class="tag tag-inline" style="margin-bottom:0px">
<img src="/static/img/icons/user.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
By:
</b>
skat
</div>
</div>
</div>
<div class="card">
<div class="card-header">
<div style="display:flex">
<a href="challenge-id-21.html">
monke
</a>
<div class="challenge-points">
<img src="/static/img/icons/flag.png"/>
500 Points
</div>
</div>
<small>
</small>
</div>
<div class="card-content">
<p>
Dog goes woof, cat goes meow, bird goes tweet, and mouse goes squeak. Cow goes moo, frog goes croak, and the elephant goes toot. Ducks say quack, and fish go blub, and the seal goes ow ow ow! But there's one sound that no one knows.
</p>
<p>
</p>
<p>
What does the monkey say?
</p>
<p>
</p>
<p>
<strong>
Important: do not attempt to retransmit any given transmissions unless you know what you are doing. Always check your local laws and legislations before you transmit. In the United States, unauthorized transmission outside of certain frequency bands is illegal and can even be considered a felony offense in some cases. Radio frequency is cool, but don't get in trouble!
</strong>
</p>
<div style="margin-top:8px; display:flex; flex-wrap: wrap">
<a href="https://cdn.discordapp.com/attachments/1056103369695047750/1057872047570698273/sample.zip" style="text-decoration:none; margin-right:8px; margin-bottom:8px" target="_blank">
<div class="tag tag-inline btn-solid btn-solid-link" style="margin-bottom:0px">
<img src="/static/img/icons/package.png" style="width:20px; height:20px; margin-right:8px">
sample.zip
</img>
</div>
</a>
</div>
<div>
</div>
<div class="tag tag-inline" style="margin-bottom:0px">
<img src="/static/img/icons/user.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
By:
</b>
skat
</div>
</div>
</div>
<div class="card">
<div class="card-header">
<div style="display:flex">
<a href="challenge-id-27.html">
backpack
</a>
<div class="challenge-points">
<img src="/static/img/icons/flag.png"/>
500 Points
</div>
</div>
<small>
</small>
</div>
<div class="card-content">
<p>
Sometimes I go around with a radio in my backpack and just see what I pick up.
</p>
<p>
</p>
<p>
Once you recover the message, wrap it with
<code>
irisctf{}
</code>
before submitting the flag.
</p>
<p>
</p>
<p>
<strong>
Important: do not attempt to retransmit any given transmissions unless you know what you are doing. Always check your local laws and legislations before you transmit. In the United States, unauthorized transmission outside of certain frequency bands is illegal and can even be considered a felony offense in some cases. Radio frequency is cool, but don't get in trouble!
</strong>
</p>
<div style="margin-top:8px; display:flex; flex-wrap: wrap">
<a href="https://cdn.discordapp.com/attachments/1056103369695047750/1059717400989286401/sample.zip" style="text-decoration:none; margin-right:8px; margin-bottom:8px" target="_blank">
<div class="tag tag-inline btn-solid btn-solid-link" style="margin-bottom:0px">
<img src="/static/img/icons/package.png" style="width:20px; height:20px; margin-right:8px">
sample.zip
</img>
</div>
</a>
</div>
<div>
</div>
<div class="tag tag-inline" style="margin-bottom:0px">
<img src="/static/img/icons/user.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
By:
</b>
skat
</div>
</div>
</div>
<div class="card">
<div class="card-header">
<div style="display:flex">
<a href="challenge-id-29.html">
Here In My Garage
</a>
<div class="challenge-points">
<img src="/static/img/icons/flag.png"/>
500 Points
</div>
</div>
<small>
</small>
</div>
<div class="card-content">
<p>
My arch-nemesis, Billy Bob Bobertson, just moved into a new house. I'm still upset at him for stealing my Pringles all those years ago -- my delicious lemon, cheese, and garlic Pringles! Let's break into Billy Bob Bobertson's house and steal his new Lamborghini parked in his garage. I hear they're a lot of fun to drive in the Hollywood hills.
</p>
<p>
</p>
<p>
I planted a secret radio receiver near his house and picked up some signals from when he parks in the garage. Unfortunately, it looks like the RF-based access mechanism he uses uses non-static codes, so I can't just replay a captured signal (unless I were to rolljam it, of course). There must be some way to break in!
</p>
<p>
</p>
<p>
Note: this challenge was set up using the unlicensed frequency spectrum. This is a resource shared by all. There may be other transmissions unrelated to the challenge due to other devices using the medium when these samples were recorded.
</p>
<p>
</p>
<p>
The flag format for this challenge is the sequence of bits required to be transmitted in order to
<em>
open
</em>
the garage. If there is a preamble, do not include it. If there are any frame header/trailer bits, do not include them. You may assume these bits will be retransmitted on the same frequency using the same modulation mechanism. If there are multiple correct answers, submit only the first. Wrap your answer with
<code>
irisctf{}
</code>
.
</p>
<p>
</p>
<p>
<strong>
Important: do not attempt to retransmit any given transmissions unless you know what you are doing. Always check your local laws and legislations before you transmit. In the United States, unauthorized transmission outside of certain frequency bands is illegal and can even be considered a felony offense in some cases. Radio frequency is cool, but don't get in trouble!
</strong>
</p>
<div style="margin-top:8px; display:flex; flex-wrap: wrap">
<a href="https://cdn.discordapp.com/attachments/1056103369695047750/1059761956732551188/samples.zip" style="text-decoration:none; margin-right:8px; margin-bottom:8px" target="_blank">
<div class="tag tag-inline btn-solid btn-solid-link" style="margin-bottom:0px">
<img src="/static/img/icons/package.png" style="width:20px; height:20px; margin-right:8px">
samples.zip
</img>
</div>
</a>
</div>
<div>
</div>
<div class="tag tag-inline" style="margin-bottom:0px">
<img src="/static/img/icons/user.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
By:
</b>
skat
</div>
</div>
</div>
</div>
<div id="footer">
<b>
<a href="https://github.com/Milkdrop/CTFx">
CTFx
</a>
</b>
v1.3.0r5
<br/>
Made with 🧡 by
<a href="https://gitlab.com/Milkdrop">
Milkdrop
</a>
, Based on
<a href="https://github.com/Nakiami/mellivora">
mellivora
</a>
</div>
<audio id="audio-typewriter" src="/static/audio/typewriter.mp3">
</audio>
<audio id="audio-nav-mouseover" src="/static/audio/nav_mouseover.mp3">
</audio>
<audio id="audio-nav-click" src="/static/audio/nav_click.mp3">
</audio>
<audio id="audio-btn-dynamic-mouseover" src="/static/audio/btn_dynamic_mouseover.mp3">
</audio>
<audio id="audio-btn-dynamic-click" src="/static/audio/btn_dynamic_click.mp3">
</audio>
<audio id="audio-btn-solid-mouseover" src="/static/audio/btn_solid_mouseover.mp3">
</audio>
<audio id="audio-btn-solid-click" src="/static/audio/btn_solid_click.mp3">
</audio>
<audio id="audio-checkbox-click" src="/static/audio/checkbox_click.mp3">
</audio>
<script src="/static/ctfx.js-v-1.3.0r5.js" type="text/javascript">
</script>
</body>
</html>