[https://rawsec.ml/en/HackCon-2017-write-ups/#10-flag-txt-bacche](https://rawsec.ml/en/HackCon-2017-write-ups/#10-flag-txt-bacche)

Original writeup (https://rawsec.ml/en/HackCon-2017-write-ups/#10-flag-txt-bacche).