Take a look at the MalwareMustDie C&C feed and create a hosts list that can be parsed by nmap

parse-c-and-c-feed.py

import bs4, requests, urllib
from urlparse import urlparse

feed = requests.get('https://malwared.malwaremustdie.org/rss.php')
feedsoup = bs4.BeautifulSoup(feed.text, 'html.parser')

urls = []

hosts_file = open('hosts.txt', 'w')

# iterate over all <link>...</link> tags
for link in feedsoup.find_all('link'):
	url = str(urlparse(urllib.unquote(link.text).decode('utf-8')).hostname).rstrip()
	urls.append(url)
	hosts_file.write(url + '\n')

hosts_file.close()