This binary contains a call to bin/sh but we need to pass a conditional jump to run it:
cmp eax, 0x149 ; eax contains the result of scanf(%d) our input. 0x149 is 5276 in decimal
jne 0x0804850d ; jumps after the system("bin/sh") callAll we have to do is input 5276 when running the program
./level00
***********************************
* -Level00 - *
***********************************
Password:5276
Authenticated!
$ cat /home/users/level01/.pass
uSq2ehEGT6c9S24zbshexZQBXUGrncxn5sD5QfGL