Infiltrating Wi-Fi Networks: Software and Techniques Without a Router

Example of Steps to Hack Wi-Fi with Fern WiFi Cracker

Here are the basic steps to use Fern WiFi Cracker:

1. To install Fern WiFi Cracker on Linux (for example, Debian-based distributions such as Ubuntu), open a terminal and run the following command:

sudo apt-get update
sudo apt-get install fern-wifi-cracker

2. Open Fern WiFi Cracker by typing the following command in the terminal:

sudo fern-wifi-cracker

3. The graphical interface of Fern WiFi Cracker will open.
4. Select the Wi-Fi adapter you want to use from the dropdown list. Make sure the adapter is in monitor mode.
5. Click the Scan for Access Points button to scan for available Wi-Fi networks.
6. Fern WiFi Cracker will display a list of detected networks, complete with information such as SSID, BSSID, channel, and encryption used.
7. Select the target network from the list of detected networks.
8. If the network uses WEP encryption, select the WEP option and if it uses WPA/WPA2, select the WPA option.
9. For WEP networks:
   • Click the Attack button under the WEP section to initiate the attack. Fern WiFi Cracker will collect data packets and try to decrypt WEP keys.
10. For WPA/WPA2 networks:Click the Attack button under the WPA section to start a brute-force attack. You need to provide a wordlist that contains a list of possible passwords.
11. Fern WiFi Cracker will try password combinations from a wordlist until it finds the correct one.
12. You can also use additional features like MAC Address Changer to change your MAC address or Network Scanner to scan for network-connected devices.

Example Use Cases

Suppose you want to test the security of your home Wi-Fi network that uses WPA2 encryption. With Fern WiFi Cracker, you can perform the following steps:

1. Open Fern WiFi Cracker and select your Wi-Fi adapter.
2. Click Scan for Access Points and wait for your home Wi-Fi network to appear in the list.Select your home network and select the WPA option.
3. Click Attack and enter the path into the wordlist containing a list of possible passwords.
4. Fern WiFi Cracker will start trying password combinations from the wordlist.
5. If the password is found, Fern WiFi Cracker will display it on the screen. You can use these passwords to better secure your network, for example by replacing them with stronger passwords.

Wi-F Hacking Techniques and Methods

Brute-Force Attack

A brute-force attack is a hacking method in which an attacker tries every possible password combination until it finds the correct one. This method is based on a simple principle: if you try all the combinations, you will eventually find the right one. Brute-force attacks harness computing power to automate this process, allowing attackers to try millions of combinations in a short period.

Brute-Force Attack Advantages:

1. Simplicity: This method is very easy to understand and apply because it does not require any special knowledge of encryption algorithms or system vulnerabilities.
2. Certainty: With enough time and resources, a brute-force attack will always succeed in finding the correct password.
3. Independent of System Vulnerabilities: Unlike other attacks that rely on specific weaknesses in the system, brute-force attacks do not require the existence of specific vulnerabilities.

Disadvantages of Brute-Force Attack:

1. Time and Resources: This method is very time-consuming and resource-intensive, especially if the attempted password is long and complex.
2. Easy Detection: Brute-force activity can usually be easily detected by security systems due to the repetitive and rapid pattern of login attempts.
3. Limited Effectiveness: Against systems with good defense mechanisms, such as limiting the number of login attempts or using CAPTCHAs, brute-force attacks become less effective.

Example of a Brute Force Attack Usage Scenario

1. Attacking WPA/WPA2 Wi-Fi Networks:
   • An attacker wants to gain access to a Wi-Fi network protected by WPA/WPA2. They capture 4-way handshake packets using tools like Wireshark or Aircrack-ng. After obtaining the pcap file containing the handshake, the attacker carries out a brute-force attack using tools such as Aircrack-ng or Hashcat and a large wordlist containing possible passwords.
   • Example command for Aircrack-ng:

aircrack-ng -w /path/to/wordlist.txt -b [BSSID] /path/to/capture.pcap

• If the password is in the wordlist, the tool will find the correct password.

1. Attacking the Website Login System:
   • An attacker tries to gain unauthorized access to a user’s account on a website. They run automated scripts that try different combinations of usernames and passwords. These scripts may use commonly used wordlists or leaked data from previous security breaches.
   • Example of a simple script with Python:

import requests

url = “https://example.com/login”
username = “admin”
passwords = [“password1”, “password2”, “password3”] # Daftar kata sandi untuk dicoba

for password in passwords:
    response = requests.post(url, data={“username”: username, “password”: password})
    if “Welcome” in response.text:
        print(f”Password found: {password}”)
        break

3. Attacking File or Archive Encryption:
   • An attacker gets an encrypted file or archive (for example, a ZIP or PDF file) and wants to open its contents. They use brute-force tools like John the Ripper or fcrackzip to try all possible password combinations until they find the right one.
   • Example command for fcrackzip:

fcrackzip -v -u -D -p /path/to/wordlist.txt /path/to/encrypted.zip

Brute-force attacks, while simple and sure to work with enough time and resources, are still a labor-intensive and often inefficient method compared to other hacking techniques. Therefore, security systems need to implement effective protection mechanisms, such as limiting the number of login attempts, using multi-factor authentication, and implementing complex and lengthy passwords.