* List bucket objects at http://bucketsoffun-ctf.s3.us-east-1.amazonaws.com/
* Retrieve flag at http://bucketsoffun-ctf.s3.us-east-1.amazonaws.com/youfoundme-asd897kjm.txt

Original writeup (https://medium.com/@nic.christin/ritsec-ctf-2019-a94a400c042a#699f).