Researchers at Arbor Networks have uncovered a botnet called Fort Disco that was used to compromise more than 6000 websites based on popular CMSs such as WordPress, Joomla and Datalife Engine. The Fort Disco botnet is currently made up of nearly 25,000 Windows machines and receives a list of sites to attack from a central command and control server. Arbor Networks security researcher Matthew Bing said the attack has several advanced features that make it next to impossible to fully track and they obtained precious info on the botnet exploiting a misconfiguration.
Source: https://thehackernews.com/2013/08/new-botnet-campaign-fort-disco-brute.html