You put on a music CD and unknowingly got malware: the historic Sony scandal that ended in court.

In the new episode of Xataka Presents published on YouTube, one of our colleagues reconstructs the case of the Sony BMG rootkit, a failed attempt to curb piracy that ended up breaching the security of thousands of computers. “When you put the disk in your computer, the program was secretly installed and saved in a hidden folder so you wouldn’t know it existed or notice it was doing anything to your computer.”

The key lay in the concept of “rootkit,” a technique usually associated with the most sophisticated malware. “A rootkit is a program that installs itself on your computer and can execute administrator permissions. In other words, it’s a type of malware designed to gain access to your operating system, hide its own activity, and remotely access the device.” Sony deliberately concealed this rootkit.