Building a Supply Chain Attack with .NET and NuGet

This article details the author's journey in constructing a proof-of-concept supply chain attack targeting .NET developers via NuGet packages. It explains the concept of software supply chain attacks, referencing real-world examples like SolarWinds and the npm Shai Hulud campaign. The author demonstrates techniques such as module initializers, source generators, MSBuild targets, and startup hooks that execute code before an application's Main method. A notable finding is the ability to publish a package impersonating 'Microsoft' using a Turkish 'i' character. The article aims to raise awareness about .NET ecosystem vulnerabilities and the ease of executing malicious code, emphasizing the need for security vigilance.