The Blackhole exploit kit has reappeared in the wild surprising the security industry after that in October 2013 its author, known as Paunch, was arrested. The experts at Malwarebytes have noticed that threat actors are reusing the exploits despite their limited effectiveness. The source code of the Blackhole Exploit Kit was leaked online four years ago allowing cybercriminals to reuse it and add new features to the core modules. The attackers behind the new Blackhole campaign left the server that hosted the control infrastructure open on the Internet, a circumstance that allowed experts to access it.”]
Source: https://securityaffairs.co/wordpress/42083/cyber-crime/blackhole-exploit-kit-resurfaces.html