The alleged cybercriminal responsible for developing and maintaining the Blackhole automated attack toolkit was arrested this week, according to the European Cybercrime Centre (EC3). The agency confirmed that authorities had a person in custody Tuesday to TechWeek Europe. The most widely used toolkit was behind many of the financially motivated attacks aimed at businesses and people. The toolkit was sold on underground hacking forums under a subscription-based business model, which included periodic updates. The updates included some of the latest exploits, such as those targeting known Java vulnerabilities, Adobe coding errors and Microsoft flaws. The toolkit is often among the first to receive updates with new exploits following major patch releases from software makers. Here are some facts about the most popular automated attack tool on the Internet.