One day, while exploring open directories on one of the command and control servers I noticed that there were files in a directory that was normally empty.

FORBES: Shadows In The Cloud

The lists can be integrated with existing firewall user databases or Lightweight Directory Access Protocol files.

CNN: VeriSign takes the pain out of digital certificates

But it turns out that, behind the scenes, Sony may also be installing invisible services in the form of a hidden directory containing cloaked files, which run when you use that media player.

ENGADGET: Sony DRM hacks your PC