Running Unicorn Payload Through Web Shell

This for escalating a low-privileged web shell to a Meterpreter shell. In this example, the Powershell execution policy was changed (using the web shell) to RemoteSigned using powershell Set-ExecutionPolicy. The normal method of storing a unicorn reverse-https payload wasn't working, since the file couldn't be written to the server (either through permissions restrictions or being picked up by antivirus).

Take the contents of the generated unicorn payload from the file, and run it as a Powershell command in the browser: