RailGun sounds like a gun set on rails; however, this is not the case. It is much more powerful than that. RailGun allows you to make calls to a Windows API without the need to compile your own DLL.
It supports numerous Windows DLL files and eases the way for us to perform system-level tasks on the victim machine. Let's see how we can perform various tasks using RailGun and perform some advanced post-exploitation with it.
RailGun requires the irb shell to be loaded into meterpreter. Let's look at how we can jump to the irb shell from meterpreter:
We can see in the preceding screenshot that simply typing in irb from meterpreter drops us into the Ruby-interactive shell. We can perform a variety of tasks with the Ruby shell and can execute any Linux command from here.