Add more svcctl packets for creating and deleting services

[usiegl00]

This pr adds support for more svcctl packets.

The two new svcctl functions are create_service_w and delete_service.

I will update the smb_shadow metasploit module to use the new packets once this is merged.

[usiegl00]

I will make a pr to metasploit-framework that depends on this one.

[cdelafuente-r7]

Thanks for updating this @usiegl00 ! The code looks good to me. I tested against Windows 10 and Windows Server 2019 and verified the code was executed correctly.

• example output:

  ❯ ruby examples/pwsh_service.rb --username smbtest2 --password 123456 --no-smbv1 --no-smbv2 192.168.144.224 "echo test-smbv3 > C:\\Users\\smbtest2\\Desktop\\test.txt"
  SMB3 : (0x00000000) STATUS_SUCCESS: The operation completed successfully.
  Binding to \svcctl...
  Bound to \svcctl
  Opening Service Control Manager
  Full Command: %COMSPEC% /c start /b /min powershell.exe -nop -win hid -noni -en ZQBjAGgAbwAgAHQAZQBzAHQALQBzAG0AYgB2ADMAIAA+ACAAQwA6AFwAVQBzAGUAcgBzAFwAcwBtAGIAdABlAHMAdAAyAFwARABlAHMAawB0AG8AcABcAHQAZQBzAHQALgB0AHgAdAA=
  Created new service
  Opening the service
  Starting the service
  Service start timed out, OK if running a command or non-service executable...
  Deleting the service
  Closing Service Control Manager
  Done

Before it lands, that would be great to have unit tests for this. This will ensure any future updates to ruby_smb won't break anything. Would you mind adding specs?