onaws

onaws is a simple tool to check if an IP/hostname belongs to the AWS IP space or not. It uses the AWS IP address ranges data published by AWS to perform the search.

The tool could be used for:

  • Continuous recon of assets
  • Gathering assets using a specific service (e.g. EC2)
  • Finding region information for S3 buckets
  • ... etc.

onaws

Install

pip install onaws

Usage

Given an IP:

onaws 52.219.47.34

Given a hostname:

A domain or subdomain can be passed as input:

onaws example.com

You may also supply an S3 bucket hostname as input:

onaws dropbox.s3.amazonaws.com

List of hostnames

onaws accepts line-delimited hosts on STDIN. This is helpful if you want to pipe the output of other tools to onaws:

$ cat hosts.txt
uber.s3.amazonaws.com
aws.com
google.com


$ cat hosts.txt | onaws
{
    "uber.s3.amazonaws.com": {
        "is_aws_ip": true,
        "ip_address": "52.218.46.121",
        "service": "S3",
        "region": "eu-west-1",
        "matched_subnet": "52.218.0.0/17",
        "hostname": "uber.s3.amazonaws.com"
    },
    "aws.com": {
        "is_aws_ip": true,
        "ip_address": "52.84.13.117",
        "service": "CLOUDFRONT",
        "region": "GLOBAL",
        "matched_subnet": "52.84.0.0/15",
        "hostname": "aws.com"
    },
    "google.com": {
        "is_aws_ip": false
    }
}

Output

If the IP/hostname falls in the AWS IP range, onaws will return the service, region and other details in the output:

{
    "is_aws_ip": true,
    "ip_address": "52.218.196.155",
    "service": "S3",
    "region": "us-west-2",
    "matched_subnet": "52.218.128.0/17",
    "hostname": "flaws.cloud"
}

GitHub

https://github.com/amalmurali47/onaws