https://rawsec.ml/en/DoubleS1405CTF-2017-write-ups/#50-instead-of-5-billion-won-i-give-you-a-cute-handcuffs-misc

Original writeup (https://rawsec.ml/en/DoubleS1405CTF-2017-write-ups/#50-instead-of-5-billion-won-i-give-you-a-cute-handcuffs-misc).