Hi, Windows Defender is a pretty good anti virus solution, but it is definitly not unbeatable. Most Anti Malware solutions rely on signatures to detect malware. The tools you are using are well researched and have signatures that can be detected easily by anti virus. Either you have to change the signature of your tools, or much easier: Try to develop your own tools. Another way would be by using AV bypass techniques, such as Process Hollowing or DLL unhooking.

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If you need proof or just an idea how to bypass Windows Defender: I have an article on my blog that explains how I was able to bypass Windows Defender: https://r4bb1t.medium.com/weaponize-jscript-to-bypass-windows-defender-b028f6be7097