Team gula.sh is participating in the Global Cyberlympics 2013 games, and we have been doing a little practicing before the first round.
Although we missed the practice rounds (I didn't get any e-mails, some of my teammates did...), thanks to my friend Hari from the Indian *.* null team, we obtained the practice round challenge package and played with it a little.
A very quick write-up on the challenges:
DECODE_ME01.txt
Base64 encoded.
Solution: WELCOME TO THE JUNGLE, WE HAVE FUN AND GAMES, SOME OF THEM ARE EVEN STAEJRWU.
DECODE_ME02.txt
Reversed String.
Solution: THIS OLD MAN, HE HAD FUN, HE PLAYED BOUTDTMS ON MY THUMB.
DECODE_ME03.txt
Digraph (a pair of characters used to write one).
Solution: sometimes the older ways are the better ways, this eimwetot is not one of them.
DECODE_ME04.txt
It was a text in hex.
Solution: I ONCE TRIED TO COUNT IN HEXADECIMAL BUT I KEPT LOOSING COUNT AFTER XUNEFILM.
DECODE_ME05.txt
Morse code.
Solution: BEEPBOOPBEEPSOUNDSLIKER2D2ISHAVINGAFITMAYBEITISBECAUSEIEIBSMSCMADEHIM
DECODE_ME06.txt
It was a text in binary.
Solution: IF YOU ADD UP ALL THE ONES IN THIS MESSAGE IT SPELLS SNFNLEGI IN EBCDIC.
DECODE_ME07.txt
URL Encoded.
Solution: TOO MANY TIMES I LOOK INTO THE FACE OF OBEMTGOE AND REALIZE THAT I AM STARING BACK AT MYSELF.
DECRYPT_ME01.txt
Caesar cipher.
Solution: IF YOU KEEP DECRYPTING ME LIKE THAT I THINK I AM GOING TO YGTRIPLO ALL OVER THE PLACE!
DECRYPT_ME02.txt
Caesar cipher.
Solution: THERE ONCE WAS A MAN FROM NANTUCKET. WHOSE NAFCMHUE WAS SO LONG, HE COULD… KEEP YOUR MIND CLEAN!!!!
DECRYPT_ME03.txt
Caesar cipher again...
Solution: IF YOU KNEW JULIUS LIKE I KNEW NADNEJUE THEN WE WOULD NOT NEED A CASEAR CIPER AT ALL.
DECRYPT_ME04.txt
Substitution cipher.
Solution: there is something evil in the way a random substitution works, it makes kewmtyat look normal.
DECRYPT_ME05.txt
Couldn't find the solution for this one in 10 mins, so we skipped it. Anyone having the solution for this, please comment, or send it to me. Thx!
FILECARVE_ME01.zip
It was a JPEG file of a QR code.
Solution:
The order of the chunks: 7862_8200_9525_1556_5490_5706_7466_7251_1055_6218_5220
QR code raw bytes: 40 85 65 54 65 24 54 35 24 10 ec 11 ec 11 ec 11 ec 11 ec
QR code raw text: VUFRECRA
FILECARVE_ME02.zip
2 JPEG files, one was a cute bunny, the other one was a QR code again.
Solution:
Chunk order for the bunny: 4192_9117_7715_4081_2994_6501_4927_3182_4957
Chunk order for the QR code: 4901_3326_4603_1700_2737_6576_6823_5471_9316_1186_4805
QR code raw bytes: 40 95 14 15 85 54 24 14 e5 50 a0 ec 11 ec 11 ec 11 ec 11
QR code raw text: QAXUBANU
FILECARVE_ME03.zip
I was too lazy to solve this one. It's a zip file, with a JPEG file named FILECARVE_ME03.JPG within. Again, if you have the solution, please comment, or send it to me. Thx!
Solution:
Thanks to Uuganjargal Amarsaikhan, The order of the chunks for this one is:
2143_0642_5467_5354_5149_0291_5335_7886_9524_4489_7997_4970_7077_6059_0284_7195_0794_6232_1519_7873_6639_7656_8091_0584_7866_3845_7804_2193_9518_7702
QR code raw bytes: 40 95 95 55 05 24 55 34 54 e0 a0 ec 11 ec 11 ec 11 ec 11
QR code raw text: YUPRESEN
Solution:
Thanks to Uuganjargal Amarsaikhan, The order of the chunks for this one is:
2143_0642_5467_5354_5149_0291_5335_7886_9524_4489_7997_4970_7077_6059_0284_7195_0794_6232_1519_7873_6639_7656_8091_0584_7866_3845_7804_2193_9518_7702
QR code raw bytes: 40 95 95 55 05 24 55 34 54 e0 a0 ec 11 ec 11 ec 11 ec 11
QR code raw text: YUPRESEN
FILECARVE_ME04.zip
I was too lazy to solve this one too. It's an mp3 file, and I think it's morse code. Once again, if you have the solution, please comment, or send it to me. Thx!
Solution:
Again, thanks to Uuganjargal Amarsaikhan, the order of the chunks for this one is: 1899_3173_4732_4730_2453_7774_4131_6350_2981_0379
Solution:
Again, thanks to Uuganjargal Amarsaikhan, the order of the chunks for this one is: 1899_3173_4732_4730_2453_7774_4131_6350_2981_0379
Morse text in the MP3 file: CHUCAPHU
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