Overthere 1.0 support a java implementation of Winrm.
It should also the winrs options, allowing to call directly the windows binary.
An implementation has been done here for BDF:
https://github.com/xebialabs/bdf-plugin/commit/c2919011ae38f72ddd612175cfbf721ff9a54c60
But there is a lot of code duplication and it will not be easy to switch in deployit for a given host between java implentation and winrs.