Authenticated enumeration

Index

• Authentication
• Manual Enumeration
  • S3 buckets
  • Webapps & SQL
  • Serverless
  • Networking
• Tools
  • PACU
  • WeirdAAL

Authentication

• AWS Command Line https://aws.amazon.com/cli/
• use --profile=<NAME> to use a specific profile for executing the commands

Set AWS programmatic keys for authentication

• use --profile=<name> for a new profile

aws configure

Manual enumeration

Get basis account info

aws sts get-caller-identity

List EC2 instances

aws ec2 describe-instances --region <region>

List IAM users

aws iam list-users

List IAM roles

aws iam list-roles

List access keys for a user

aws iam list-access-keys --user-name <username>

S3 buckets

List s3 buckets

aws iam list-roles

List the contents of an S3 bucket

aws s3 ls s3://<bucketname>/ 

Download contents of bucket

aws s3 sync s3://bucketname s3-files-dir

List EC2 instances

aws ec2 describe-instances

Webapps and SQL

List WebApps

aws deploy list-applications

List AWS RDS (SQL)

aws rds describe-db-instances --region <region name>

Knowing the VPC Security Group ID you can query the firewall rules to determine connectivity potential

aws ec2 describe-security-groups --group-ids <VPC Security Group ID> --region <region>

Serverless

List Lambda Functions

aws lambda list-functions --region <region>

Look at environment variables set for secrets and analyze code

aws lambda get-function --function-name <lambda function>

Networking

List EC2 subnets

aws ec2 describe-subnets

List ec2 network interfaces

aws ec2 describe-network-interfaces

List DirectConnect (VPN) connections

aws directconnect describe-connections

Tools

PACU

Enumerate account information and permissions

run iam__enum_users_roles_policies_groups
run iam__enum_permissions
whoami

WeirdAAL

Setup authentication with keys

cp env.sample .env
nano .env

#Add the following contents:
[default]
aws_access_key_id = <Access-key>
aws_secret_access_key = <Secret-access-key>
aws_session_token = <Session-Token>

Run recon_all module

python3 weirdAAL.py -m recon_all -t ssrf

List permissions

python3 weirdAAL.py -m list_services_by_key -t ssrf

List S3 buckets

python3 weirdAAL.py -m s3_get_bucket_policy -a <s3 bucket> -t ssrf

Download file from s3 bucket

python3 weirdAAL.py -m s3_download_file -a ‘<s3 bucket','admin-user.txt' -t ssrf
cat loot/<s3 bucket name>/admin-user.txt