[CTF Writeups] InCTF 2014 Round 2 Reverse[3] 50

Download the file, extract it and check the file details using the command 'file'.

#file three
three: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, BuildID[sha1]=0xdcc8c235853a156ab338ea9833f4a20a713d72a8, not stripped

So it says the file is not stripped then let's try to find out the readable string in the binary using the command 'strings'

#strings three

/lib64/ld-linux-x86-64.so.2
libc.so.6
puts
printf
strcmp
__libc_start_main
__gmon_start__
GLIBC_2.2.5
UH-P
UH-P
l$ L
t$(L
|$0H
Usage: %s 
reversing_is_super_fun
Yaay! Now submit md5 of key for points
Wrong key! Look for key again!
;*3$"

The text 'reversing_is_super_fun' looks like a flag so let's find the md5 of that text and submit it....yeah it works..