Enumeration
Check if the resolved domain contains the word "website".
You can access the static website at:
flaws.cloud.s3-website-us-west-2.amazonaws.com or the bucket at: flaws.cloud.s3-us-west-2.amazonaws.com. If you try to access a bucket but specify a different region in the domain name (for example, the bucket is in
bucket.s3.amazonaws.com but you are trying to access bucket.s3-website-us-west-2.amazonaws.com), you will be redirected to the correct location. Test to see if a website is hosted in an s3 bucket
dig +nocmd flaws.cloud any +multiline +noall +answer
get IP address
Put IP in browser - it will redirect to AWS console s3 page.
Run
nslookup on the IP to get the AWS s3 website
The site
flaws.cloud is hosted as an S3 bucket. This is a great way to host a static site, similar to hosting one via github pages. Some interesting facts about S3 hosting: When hosting a site as an S3 bucket, the bucket name (flaws.cloud) must match the domain name (flaws.cloud). Also, S3 buckets are a global name space, meaning two people cannot have buckets with the same name. The result of this is you could create a bucket named apple.com and Apple would never be able host their main site via S3 hosting./bucketflaws.sh -u flaws.cloud -o -p -d
Using the AWS cli
aws s3 ls s3://flaws.cloud/ --no-sign-request --region us-west-2
Will list the files in the bucket
S3 bucket with "Everyone" having "List" permissions
AKIAJ366LIPB4IJKT7SA = long term access key - note the AKIAASIAJ366LIJGULDN21D = session access key - note the ASIAAWS allows you to take snapshots of EC2 and databases (RDS). The main purpose for this is to create backup copies, but sometimes users use snapshots to regain access to their own EC2s if they forget passwords.
AWS allows you to take snapshots of EC2 and databases (RDS). The main purpose for this is to create backups, but sometimes people use snapshots to regain access to their own EC2s if they forget passwords. This also allows attackers to get access to things. Snapshots are usually limited to your own account. So a possible attack would be for an attacker to get access to an AWS key that allows them to start/stop EC2s and do other things to EC2s, and then use that to take a snapshot of an EC2 and start an EC2 with that volume in your environment to gain access to it. As with all backups, you need to be careful to protect them.
Look for snapshots that this user has access to (note the
SnapshotId): remember to include the --owner-id else you will get a lot of output that is not relevant
aws ec2 describe-snapshots --profile flaws3 --owner-id 975426262029 --region us-west-2
get SnapshotId
aws ec2 create-volume --profile default --availability-zone us-west-2a --region us-west-2 --snapshot-id snap-0b49342abd1bdcb89
launch an ec2 instance and attach the volume
run
lsblk to see if disk is attached
Then run sudo mount
/dev/xvdf1 /mnt to mount the drive, browse to /mnt to view snapshot disk
Last modified 2yr ago