Reverse engineering a 4 staged binary

Preface

Yo! Life kept me more than busy, but now I’ve got a little more time on my hands. I decided to do a write up on the following binary, because it taught me some new things, compared to the easy reversemes I did before.

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Crackme challenge 100 pts

Binary

r101: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.24, BuildID[sha1]=0f464824cc8ee321ef9a80a799c70b1b6aec8168, stripped
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