Build Error in Umbral-Stealer Project

[mrxehmad]

During the build process of the Umbral-Stealer project, I encountered the following error:

• Error MSB4803: The task "LC" is not supported on the .NET Core version of MS Build.
• dependencies errors which are solved manually
  I was Building It with dotnet not using visual studio.
  Suggest some things because it is detected by many antiviruses, how do I make it fully undetectable I bind it with other exes but still detected.

[Blank-c]

The project supports .NET Framework 4.7.2, you are not supplying the correct version to the compiler.

Since the project is open source, it would be very had to reduce the detections. You can still try to encrypt it, and make a mechanism to decrypt and load it in memory at runtime.
You can search about "batcloak", an evasion tool which implements this functionality.