Le sot
For this challenge, we need to access the bucket cloud-intro-challenge. I first try to connect using the aws command but it didn’t work because we don’t have credentials.
I then found this website that explains how to access S3 buckets, but you may have found the official method on the AWS website.
So we just use the URL https://cloud-intro-challenge.s3.gra.io.cloud.ovh.net/ and we have the following result:
It is not quite easy to read it because there is no carriage return but if you go into the source code, you can see the Key value contain the file we want to access:
As stated in the previous link, to access a file on a bucket we need to look for https://BUCKET-NAME.s3.region-code.amazonaws.com/KEY-NAME We then go to https://cloud-intro-challenge.s3.gra.io.cloud.ovh.net/les-moutons.json and we find the file containing the flag:
Flag: 404CTF{D35_m0utOns_D4n5_13s_NU@g3s}