Suninatas Game 28

Posted on Edited on In Views: Disqus: Word count in article: 505 Reading time ≈ 2 mins.

challenges

Game 28

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# You need not do brute-force

❯ file So_Simple.zip
So_Simple.zip: Zip archive data, made by v2.0, extract using at least v2.0, last modified, last modified Sun, Oct 21 2013 15:07:58, uncompressed size 205, method=deflate

need to know zip pseudo encryption

use tool

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❯ unar So_Simple.zip
So_Simple.zip: Zip
  Am_I_key.zip  (205 B)... OK.
  Am_I_key2.txt  (4335 B)... OK.
  Am_I_key3.txt  (1445 B)... OK.
Successfully extracted to "So_Simple".

~/Downloads
❯ y

~/Downloads/So_Simple
❯ unar Am_I_key.zip
Am_I_key.zip: Zip
  There_is_key.txt  (61 B)... OK.
Successfully extracted to "./There_is_key.txt".

# cat
Isn't it so easy?

Take it.

dGE1dHlfSDR6M2xudXRfY29mZmVl

# from base64
ta5ty_H4z3lnut_coffee

or use radare2, press V and i to change the hex value 0x0908 to 0x0008

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- offset -   0 1  2 3  4 5  6 7  8 9  A B  C D  E F  0123456789ABCDEF  comment
0x00000000  504b 0304 1400 0908 0800 fd78 5543 2313  PK.........xUC#.
0x00000010  246c 9200 0000 cd00 0000 0c00 0800 416d  $l............Am
0x00000020  5f49 5f6b 6579 2e7a 6970 7ae5 0400 b503  _I_key.zipz.....
0x00000030  0000 0bf0 6666 1161 6060 e060 f852 11ea  ....ff.a``.`.R..
0x00000040  6c5c 6770 cd1a c8b3 0562 01a0 5848 466a  l\gp.....b..XHFj
0x00000050  516a 7c66 717c 766a a55e 4945 49d5 5316  Qj|fq|vj.^IEI.S.
0x00000060  86ad cc0c 0c9f 75ce 05eb 079e d009 d438  ......u........8
0x00000070  17ee e1ab b36e cbf3 a78f 9e72 799e f163  .....n.....ry..c
0x00000080  ed7a d978 43f3 ddba 364d 39cb cc83 7a8e  .z.xC...6M9...z.
0x00000090  69fb dc44 976a 0a3a 664e 749b b633 7067  i..D.j.:fNt..3pg
0x000000a0  a225 4380 3723 9308 036e 2b41 8091 4181  .%C.7#...n+A..A.
0x000000b0  0102 7039 20c0 9b95 0da2 9291 c10d 4817  ..p9 .........H.
0x000000c0  8255 0300 504b 0304 1400 0908 0800 c479  .U..PK.........y
0x000000d0  5543 aa7c 88e7 1e00 0000 ef10 0000 0d00  UC.|............
0x000000e0  0000 416d 5f49 5f6b 6579 322e 7478 74ed  ..Am_I_key2.txt.
0x000000f0  c431 0d00 0008 0330 73b3 b393 03f7 f820  .1.....0s....... <-
0x00000100  edd1 4cbb 9124 4992 2449 7ad3 0150 4b03  ..L..$I.$Iz..PK.
0x00000110  0414 0009 0808 009c 7955 4383 ec3e a413  ........yUC..>..
0x00000120  0000 00a5 0500 000d 0000 0041 6d5f 495f  ...........Am_I_
0x00000130  6b65 7933 2e74 7874 7329 cdcd ad74 1925  key3.txts)...t.%
0x00000140  4689 5162 9418 2506 2501 0050 4b01 0214  F.Qb..%.%..PK...
0x00000150  0014 0000 0808 00fd 7855 4323 1324 6c92  ........xUC#.$l.
0x00000160  0000 00cd 0000 000c 0008 0000 0000 0001  ................ <-
0x00000170  0020 0000 0000 0000 0041 6d5f 495f 6b65  . .......Am_I_ke
0x00000180  792e 7a69 707a e504 00b5 0300 0050 4b01  y.zipz.......PK.
0x00000190  0214 0014 0000 0808 00c4 7955 43aa 7c88  ..........yUC.|.
0x000001a0  e71e 0000 00ef 1000 000d 0000 0000 0000  ................
0x000001b0  0001 0020 0000 00c4 0000 0041 6d5f 495f  ... .......Am_I_
0x000001c0  6b65 7932 2e74 7874 504b 0102 1400 1400  key2.txtPK......
0x000001d0  0008 0800 9c79 5543 83ec 3ea4 1300 0000  .....yUC..>..... <-
0x000001e0  a505 0000 0d00 0000 0000 0000 0100 2000  .............. .
0x000001f0  0000 0d01 0000 416d 5f49 5f6b 6579 332e  ......Am_I_key3.
0x00000200  7478 7450 4b05 0600 0000 0003 0003 00b8  txtPK...........
0x00000210  0000 004b 0100 0000 00ff ffff ffff ffff  ...K............