T1127.001 MSBuild — Attack Simulation

Technique description

Adversaries may use MSBuild to proxy execution of code through a trusted Windows utility. MSBuild.exe (Microsoft Build Engine) is a software build platform used by Visual Studio. It handles XML formatted project files that define requirements for loading and building various platforms and configurations. Adversaries can abuse MSBuild to proxy execution of malicious code. The inline task capability of MSBuild that was introduced in .NET version 4…

At least one platform-compatible Atomic procedure is documented. Individual review, lab prerequisites, and validation remain required.

Official ATT&CK definition · Detection rules and anomaly models

Documented simulation candidates

• MSBuild Bypass Using Inline Tasks (C#)
  windowsautomatedcommand_prompt

  Procedure 58742c0f-cb01-44cd-a60b-fb26e8871c93; elevation not declared required; cleanup not declared. Not executed or individually validated.

• MSBuild Bypass Using Inline Tasks (VB)
  windowsautomatedcommand_prompt

  Procedure ab042179-c0c5-402f-9bc8-42741f5ce359; elevation not declared required; cleanup not declared. Not executed or individually validated.