Last week Nightmare Eclipse open sourced BigDiskBuster - although I can see that now all the repositories have been made private. This post is my analysis of this tool that many news outlets called a "0day" initially. In reality, it is a class of defense-evasion tools that never touches a security product - Windows Defender in this case. It does not involve a driver unload, or Read more about Analysing BigDiskBuster, the Microsoft Defender Update Blocker