# space-dust
First of all, I observed a `==` at the end of the content of the file. Immediated I decoded it from base64 and stored in other file. And the file size is a bit suspicious so I observed its hexdump. It contains a PNG header. So, I renamed the image image into decoded.png. Then i opened the image it has the flag in it.
```bashmj0ln1r@Linux:~/space-dust$ cat message_from_tom.txt | base64 -d >> decodedmj0ln1r@Linux:~/space-dust$mj0ln1r@Linux:~/space-dust$ xxd decode | head00000000: 8950 4e47 0d0a 1a0a 0000 000d 4948 4452  .PNG........IHDR00000010: 0000 0a00 0000 05a0 0806 0000 0092 001a  ................00000020: df00 0000 0173 5247 4200 aece 1ce9 0000  .....sRGB.......00000030: 0004 6741 4d41 0000 b18f 0bfc 6105 0000  ..gAMA......a...00000040: 0009 7048 5973 0000 0ec3 0000 0ec3 01c7  ..pHYs..........00000050: 6fa8 6400 00ff a549 4441 5478 5ee4 fd67  o.d....IDATx^..g00000060: 776c 3b92 a609 1a35 e9d4 fae8 2b43 6556  wl;....5....+CeV00000070: 5677 4fcf 879e 5933 ffad fe5d d7a8 55d5  VwO...Y3...]..U.00000080: 5599 1915 1157 9c7b 34b5 763a f5bc cf6b  U....W.{4.v:...k
mj0ln1r@Linux:~/space-dust$ mv decoded decoded.png```
The decoded image is  decoded.png .
> `Flag : jctf{th1s_1s_n0t_a_game}`
## [Original Writeup](https://themj0ln1r.github.io/posts/jerseyctf23)