Intimately tied to botnets, Fast-Flux domains are increasingly being used in online phishing schemes and spammed sites. No longer a spammer/phisher's test concept, more and more spammers are taking advantage of this technique, which makes identifying phishing schemes more difficult and leaves the users/victims unaware that they were on an illegitimate site. When used for spammed sites, a hijacked set of botnet machines are harder to suspend based on the IP address, since they are constantly moving over thousands of addresses.