June 11th a Microsoft engineer accidentally leaked 4GB of Microsoft PlayReady internal code. It was leaked on the Microsoft Developer Community. The leak includes:
- WarBird configurations
- WarBird libraries for code obfuscation functionality
- Libraries with symbolic information related to PlayReady
Researchers from AG Security Research Lab were able to successfully build the Windows PlayReady dll library from the leaked code. Interestingly, they were assisted because on the Microsoft Developer Community forum a user also provided step-by-step instructions on how to begin the build process.
Also, interestingly, interestingly, the Microsoft Symbol Server doesn't block requests for PDB files corresponding to Microsoft WarBird libraries, which inadvertently leaks more information.
Adam Gowdiak of AG Security Research Lab reported the issue and Microsoft removed the forum post. However, as of this writing, the download link is still active.
File listing is below. Forums screenshots are attached. All information discovered by AG Security Research Lab
File listing:
https://pastebin.com/raw/i65qfd2z
