Hacker attack of the app. You can insert any DLL or source code into a running application to intercept the user’s keyboard input to steal the password. In addition, the hacked code can also be inserted into image files and distributed on the network.Web hacking. You can create web crawlers, collect links contained in web pages, implement SQL injection, and insert error codes into the part that handles user input. You can use Python to implement a simple web browser function.By manipulating HTTP packets, you can download the files needed to attack the web shell.