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1. gctf19-minetestgctf19-minetestPublic

   Write-up on the minetest challenge of Google CTF 2019

   C#

2. hitconctf19-suicunehitconctf19-suicunePublic

   Write-up on the Suicune challenge of HITCON CTF 2019

   C#

3. Easy Crack Me @ TWCTF 2019.mdEasy Crack Me @ TWCTF 2019.md

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   The original executable was a flag checker. After reverse engineering, the following pieces of information could be gathered:

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   * The length of the flag

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   * Count of each hex digit in the string

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   * Wheter a digit was in the 0-9 or a-f range

4. Refrain @ TCTF 2019.mdRefrain @ TCTF 2019.md

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   ### Requirements:

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   * Ubuntu 16.04 

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   * Kernel version 4.10.0-42-generic and associated perf tools

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   * ImageMagick convert utility