Help with bypassing an antivirus

I've recently had trouble bypassing bitdefender again and was wondering if anyone had any tips or could help me to bypass this?

Hi, are you trying to encrypt a native or a .net executable? If it is a native one, you could take the pe-union source code as a prototype and improve + heavily obfuscate it. If your payload is .net, you better use a vbs script (.vbs) file as a wrapper