SINCON 2024

SINCON 2024

Main CTF page: https://hackerware.io/sincon2024

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1

And that’s the way… 6330 306b 3133 2063 7275 6d62 6c33 73

Use Cyberchef:

Flag: c00k13 crumbl3s

2

Any cookie crumbs on the lanyard?

Looking at the symbol ciphers on dcode, the symbols on the lanyard seem like pigpen cipher.

Decode it with the tool dcode pigpen cipher.

Flag: sincookie
(Uppercase letters didn’t work)

3

Do you really talk logic?

aGFja2Vyd2FyZS5pby9jb29rMWVsb2cxYw==

Use Cyberchef:

In the website https://hackerware.io/cook1elog1c:

Each image is of a bunch of logic gates and light bulbs.

• cook1elog1c-1.png
  
• cook1elog1c-2.png
  
• cook1elog1c-3.png
  
• cook1elog1c-4.png
  

Refer to this image about logic gates for help.

… இ௰இ
Here are the images with my annotations:

cook1elog1c-1.png	cook1elog1c-2.png
cook1elog1c-3.png	cook1elog1c-4.png

Together, it gives 01100011 01100001 01101011 00110011. Use Cyberchef:

Flag: cak3

4

All the layers of baking a cookie…

aGFja2Vyd2FyZS5pby9jb29rMWVsNHkzci56aXA=

Use Cyberchef:

From the website https://hackerware.io/cook1el4y3r.zip:

• cook1el4y3r.zip
  
  

Most of the files are “.gbr” files, which are Gerber files. A similar challenge found online involving Gerber files can be found in DEFCON 29 HHV Challenge.

Use Gerber online file viewer:

While viewing layers:

When removing the yellow layer Badge_V1-B_Cu_Main.gbr, we see “ch3rry 0n b0tt0m”.

Flag: ch3rry 0n b0tt0m

5

Secret ingredient hidden inside the cookie?

aGFja2Vyd2FyZS5pby9jb29rMWVzdDNnNG5v

Use Cyberchef:

In the website https://hackerware.io/cook1est3g4no:

There were no findings from the source code or network.

Adding “.jpg” to the end of the URL gives an image https://hackerware.io/cook1est3g4no.jpg.

• cook1est3g4no.jpg

Using passphrase “cook1est3g4no”:

Flag: c0rn st4rch

6

What if the secret ingredient is Apple Cider Vignere?

d3a1r10fw

Use Cyberchef and the key “apple”:

Flag: d3l1c10us

7

	1	2	3	4	5
1	A	B	C	1	2
2	D	T	F	3	4
3	G	H	I	5	6
4	J	K	L	R	8
5	S	N	U	9	9

32255221 1452 412544

For each set of 2 numbers, follow the table’s left column for the first and the top row for the second.

L/R	32	25	52	21	14	52	41	25	44
chr	H	4	N	D	1	N	J	4	R

Flag: h4nd 1n j4r
(Uppercase letters didn’t work)

8

$9$9vgrp0IKvLVs4EcSrlK7NgoJGUHP5F3n/UjHm5FAtp0O1IcSylMWxIE7VY4DjTz369p

Google:

Use this sus decryption tool hxxp://password-decrypt[.]com/:

Flag: give that man a cookie

yay

The badge:

(▀̿Ĺ▀̿ ̿)ノ♪