W32.Stuxnet has gained a lot of attention from researchers and media recently. There is good reason for this. Stuxnet is one of the most complex threats the author have analyzed. In this paper the author take a detailed look at Stuxnet and its various components and particularly focus on the final goal of Stuxnet, which is to reprogram industrial control systems. Stuxnet is a large, complex piece of malware with many different components and functionalities. The author have already covered some of these components in the blog series on the topic. While some of the information from those blogs is included here, this paper is a more comprehensive and in-depth look at the threat.