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ABCTF - 30 - GZ - Forensics

noraj (Alexandre ZANNI)
, , ,
🇬🇧

Information#

Version#

By Version Comment
noraj 1.0 Creation

CTF#

  • Name : ABCTF 2016
  • Website : http://abctf.xyz/
  • Type : Online
  • Format : Jeopardy - Student
  • CTF Time : link

Description#

We shot a flag into [this][this] file but some things got messed up on the way... [this]:https://mega.nz/#!z4dlBSTb!5A2R5e6O9xYFYLhAcYUL8vRio4MW6dSfOWdEMaYuE80 "Mega"

Solution#

  1. Not so much interesting in raw:
cat flag
�^pWflagstrq�N*��N͋��,(H-����%�
  1. Let's check what is that:
file flag
flag: gzip compressed data, was "flag", last modified: Sun Jun 26 17:22:38 2016, from Unix
  1. Ok fine, if it's a gzip archive let's extract it
gzip -dc flag > test && cat test
ABCTF{broken_zipper}
  1. I don't care that is a broken archive! I got my flag: ABCTF{broken_zipper}
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