Generate a masscan configuration file for the EC2 IP address ranges.

ec2_masscan_conf.py

import requests

resp = requests.get('https://ip-ranges.amazonaws.com/ip-ranges.json')
ranges = resp.json()

sync = ranges['syncToken']
ec2 = [r['ip_prefix'] for r in ranges['prefixes'] if r['service'] == 'EC2']

with open('ec2.conf', 'wb') as f:
    f.write('EC2 Masscan Configuration.\n'.encode('utf-8'))
    f.write('rate = 5000.00\n'.encode('utf-8'))
    f.write('output-format = list\n'.encode('utf-8'))
    f.write('output-filename = ec2_{0}.list\n'.format(sync).encode('utf-8'))
    for r in ec2:
        f.write('range = {0}\n'.format(r).encode('utf-8'))