WSO shell is included in the most common shell list, and a shell known as very old, wso shell is one of the easiest shells to use, encoded with the php coding language, and an entry-level hacker can easily use it and is usually the choice of all hackers.ss
It allows you to read, modify and edit files when you upload them to the target site, it allows you to delete and much more, and it allows you to set up a connection to connect back to the network, save PHP code to the server, run the command.
Can download another version of the WSO here.