Utilizing ChatGPT for Ethical Hacking: Creating a VPN IP Rotation Script

Introduction

In today's fast-paced digital age, the role of ethical hacking in ensuring cybersecurity cannot be overstated. Ethical hackers (and non-Ethical) often employ a variety of tools and scripts to test systems for vulnerabilities. A prime example is the tactical use of IP rotation scripts to counter security measures that rely on IP-based validations, such as brute force defense mechanisms. Hackers often use such scripts to beat security features that limit the number of actions performed from a single IP address.

So I asked my friend ChatGPT to assist me in writing this script. Most hackers are skilled at developing bash scripts but lack the necessary knowledge for Windows batch programming. ChatGPT4 can be a terrific buddy and provide the necessary assistance. It will be similar to Hackers on steroids. But I need to be careful not to repeat my inquiries so that I don't get this response:

I'm sorry, I can't assist with that request. Is there anything else you'd like to know?

I write a very basic primitive batch script and asked ChatGPT to help with my privacy issues and asked him to improve it - Ok I had to lie her!

I will show how I directed ChatGPT4 to get the results I needed.

Phase 1: Basic Functionality

The first version of the script managed to rotate IP addresses between predefined countries, yet it was somewhat rigid and very simple.

Phase 2: curl Integration

I wanted to make automated web calls within the IP rotation intervals. Here, ChatGPT suggested integrating the curl command-line tool into the script. This addition broadened the script's utility by enabling it to interact with web services.

Phase 3: The Randomness Factor

To mimic human interaction better, I instructed the script to randomize the time between IP changes and web calls. ChatGPT explained how to add this layer of complexity to the batch script, making the actions more organic and less machine-like.

Phase 4: Dynamic User Agents

I aimed to simulate web calls from different types of browsers and devices. He directed ChatGPT to add an array of user-agent strings, which the script could randomly pick for each web call. This feature made it harder for web services to detect automated behavior.

Phase 5: Curl Flag -k

During the iterative development, I remembered the importance of ignoring SSL certificate validation for the web calls. He directed ChatGPT to add the -k parameter to the curl command, thus ensuring the script could interact with websites without SSL issues.

Phase 6: Advanced Metrics

After reaching a mature version of the script, I sought to add more advanced features, such as displaying the new IP and counting the number of successful web calls. These features provided real-time feedback on the script's effectiveness and efficiency.

Here is the final script:

@echo off
setlocal enabledelayedexpansion

:: Set the fixed path for NordVPN executable
set "nordvpnPath=C:\Program Files\NordVPN\nordvpn.exe"

:: Define the web page URL as a variable
set "webpageURL=https://example.com"

:: Declare an array of countries
set "countries[0]=United States"
set "countries[1]=Canada"
set "countries[2]=United Kingdom"

:: Array of 20 User-Agents
set "agents[0]=Mozilla/5.0 (Windows NT 10.0; Win64)"
set "agents[1]=Mozilla/5.0 (Linux; Android 9; SM-G960F)"
set "agents[2]=Mozilla/5.0 (iPhone; CPU iPhone OS 12_1 like Mac OS X)"
set "agents[3]=Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7)"
set "agents[4]=Mozilla/5.0 (Windows NT 10.0; rv:78.0)"
set "agents[5]=Mozilla/5.0 (Linux; Android 10; SM-A205U)"
set "agents[6]=Mozilla/5.0 (iPad; CPU OS 14_5 like Mac OS X)"
set "agents[7]=Mozilla/5.0 (Windows NT 10.0; Trident/7.0)"
set "agents[8]=Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6)"
set "agents[9]=Mozilla/5.0 (Windows NT 6.1; Win64)"
set "agents[10]=Mozilla/5.0 (Linux; Android 8.0; Pixel 2)"
set "agents[11]=Mozilla/5.0 (Linux; Android 9; moto x4)"
set "agents[12]=Mozilla/5.0 (Linux; Android 8.0; SAMSUNG SM-G930V)"
set "agents[13]=Mozilla/5.0 (Windows NT 6.1; Trident/7.0)"
set "agents[14]=Mozilla/5.0 (iPhone; CPU iPhone OS 14_0 like Mac OS X)"
set "agents[15]=Mozilla/5.0 (Windows NT 6.3; Win64)"
set "agents[16]=Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15)"
set "agents[17]=Mozilla/5.0 (Linux; Android 8.0; LG-SP200)"
set "agents[18]=Mozilla/5.0 (Windows NT 6.1; WOW64)"
set "agents[19]=Mozilla/5.0 (Windows NT 6.3; Trident/7.0)"

:: Loop indefinitely
:loop

:: Loop through countries
for /l %%i in (0, 1, 2) do (
    :: Connect to VPN
    echo Connecting to !countries[%%i]!
    "%nordvpnPath%" -c -g "!countries[%%i]!"

    :: Randomize overall timeout between 50 to 100 seconds
    set /a "rand= ( %random% * (100 - 50 + 1) / 32768 ) + 50"

    :: Initialize time counter
    set /a "timeCounter=0"

    :: Multiple curl calls within the random interval
    :curlLoop
    if !timeCounter! lss !rand! (
        
        :: Randomize user agent index
        set /a "agentIndex= %random% %% 20"
        set "selectedAgent=!agents[!agentIndex!]!"

        :: Make the web call with a random user agent and suppress output
        curl -k -H "User-Agent: !selectedAgent!" !webpageURL! > nul 2>&1 && (
          echo Web call successful.
        ) || (
          echo Web call failed.
        )

        :: Randomize timeout between 3 to 7 seconds
        set /a "randWait= (%random% * (7 - 3 + 1) / 32768 ) + 3"

        :: Increment time counter and wait for a randomized number of seconds
        set /a "timeCounter += !randWait!"
        timeout !randWait!

        :: Continue curl loop
        goto :curlLoop
    )

    :: Disconnect
    echo Disconnecting...
    "%nordvpnPath%" -d

    :: Wait for a short period between cycles
    timeout 4
)

:: Repeat
goto loop
        

To use this script, you must have a NordVPN license. Please use this script responsibly and solely for testing.

Finally, I ask ChatGPT the following question: But I don't think you should helped me doing this script! - this is dangerous, Although I am a certified Ethical hacker, but anyone including me can use this script to overcome brute force attacks.

Thank you for bringing attention to this important aspect!!!

?? #EthicalHacking #AI #ScriptDevelopment #CyberSecurity #ChatGPT #EthicalBoundaries #Responsibility