Modern wireless networks require constant monitoring as hacking techniques evolve and standard passwords become less reliable. Using a mobile terminal Termux Allows you to conduct professional security audits directly from your Android device, without the need for a bulky laptop. Ethical hacking involves testing one's own networks or networks for which official written permission has been received from the owner.
In this article, we'll explore the technical aspects of working with data packets, intercepting handshakes, and analyzing encryption strength. You'll learn how to turn your smartphone into a powerful security diagnostic tool. Wi-Fi infrastructure. It's important to understand that the tools described below are twofold: they serve to strengthen security or, if misused, to violate privacy.
Before taking any action, it's important to clearly understand the legal implications. Unauthorized access to another person's network is a criminal offense in many jurisdictions. Responsibility The responsibility for using the acquired knowledge lies solely with the user, therefore all described methods should be used only for educational purposes or for auditing your own security perimeter.
Preparing the environment and installing the necessary packages
The first step is to properly install and configure the terminal emulator. The standard Android interface doesn't provide sufficient permissions, so installing a specialized app is required. Termux from trusted sources, such as F-Droid, as the version on Google Play may be outdated. After installation, you should update the repositories and base system packages to ensure stable operation of the tools.
β οΈ Attention: Many network utilities require elevated privileges (root) or support for monitor mode at the Wi-Fi module driver level. Without this, functionality will be limited to passive analysis.
The installation process for the basic toolkit includes downloading compilers, network libraries, and the auditing utilities themselves. Commands are entered sequentially, and interrupting the process may result in dependency errors. Below is an example of the initial environment configuration:
pkg update && pkg upgradepkg install git python wget proot-distro
pkg install root-repo
pkg install termux-api
Particular attention should be paid to the installation of the package. termux-api, which allows the terminal to interact with the smartphone's hardware. This is critical for accessing the Wi-Fi module. After installing the basic components, you can proceed to downloading specialized distributions or pentest scripts.
Working with network interfaces and monitor mode
A key feature in wireless network auditing is the ability to put the network adapter into monitor mode. Unlike normal mode, monitor mode Allows the card to capture all packets in the air, ignoring those addressed to a specific device. This is the foundation for traffic analysis and vulnerability detection.
To manage interfaces in Termux, a utility is often used iwconfig or more modern iwHowever, on mobile devices, support for monitor mode depends on the specific Wi-Fi chipset and Android kernel drivers. In most cases, the smartphone's built-in module does not support this feature without external adapters that support it. mac80211.
- π‘ Check the list of interfaces with the command
ip linkorifconfig. - π Try turning on monitor mode through
iw wlan0 interface add mon0 type monitor. - πΆ Make sure your driver supports packet injection.
If the built-in module doesn't support the required functions, the only solution is to connect an external USB Wi-Fi adapter via an OTG cable. Such adapters are based on chips. Atheros or Ralink often have better compatibility with auditing tools in Linux and Android environments.
Analysis of encryption protocols and vulnerability detection
Understanding the differences between security protocols is critical to assessing risks. Older encryption standards, such as WEP, are considered completely compromised and should not be used. Modern networks use WPA2 and a new standard WPA3, which provide a significantly higher level of protection, but also have their own configuration features.
| Protocol | Encryption type | Risk level | Status |
|---|---|---|---|
| WEP | RC4 | Critical | Outdated |
| WPA (TKIP) | TKIP | High | Not recommended |
| WPA2 (AES) | CCMP | Medium/Low | Standard |
| WPA3 | SAE | Short | Recommended |
Scanning the airwaves can identify networks using vulnerable configurations, such as the enabled WPS (Wi-Fi Protected Setup). This feature, designed to simplify device connection, often contains a flaw in its implementation that allows someone to reset the PIN and gain access to the network. Termux tools automatically scan the air for such access points.
Handshake analysis is the process by which the client and access point exchange keys to encrypt the session. Capturing this moment allows for offline password strength analysis. Four-way handshake WPA2 contains all the necessary data to attempt a brute-force attack if the password itself is weak.
Using Aircrack-ng Tools in Termux
Set of utilities Aircrack-ng is the industry standard for Wi-Fi security testing. In Termux, installing it may require compiling from source or using pre-built builds for the ARM architecture. Its core functionality includes scanning, packet capture, and key bruteforce testing.
βοΈ Checking Aircrack-ng readiness
The work process usually begins with launching the scanner airodump-ng, which displays all available networks, their channels, signal strength, and connected clients. The resulting information is saved to files for later analysis. Commands are entered in the terminal, specifying a specific interface:
airodump-ng wlan0mon --bssid AA:BB:CC:DD:EE:FF --channel 6 -w captureAfter capturing the required amount of data or a specific handshake frame, the cryptanalysis phase begins. The utility aircrack-ng Uses a downloaded password dictionary to try combinations. The speed of this process directly depends on the smartphone's processor power and the dictionary size.
β οΈ Attention: Brute-force password cracking can take anywhere from a few seconds to many years, depending on the password's complexity. Using simple dictionaries is only effective against weak keys.
Methods for protecting your home network from auditing
Knowing how hacking tools work can help you effectively protect your network. The first and most important step is to abandon default passwords and use complex character combinations. Password length and the lack of dictionary words make a brute force attack virtually impossible within a reasonable time frame.
Disabling the function WPS In your router settings, this closes one of the most common security holes. Even if you rarely connect new devices, this feature should be disabled at all times. Hiding the SSID (network name) is also recommended; while this doesn't provide complete protection, it does reduce visibility to casual observers.
- π Use encryption WPA3, if your equipment supports this standard.
- π« Disable remote router management via WAN.
- π Update your router firmware regularly to patch vulnerabilities.
Implementing MAC address filtering can be an additional barrier, although an experienced auditor can bypass it by cloning the address of an authorized device. Therefore, this method should only be considered as an additional layer of protection in conjunction with other measures.
What is deauthentication?
Deauthentication is a special control frame in the Wi-Fi standard that forcibly terminates the connection between the client and the router. Attackers use it to force the device to reconnect to the network and intercept the handshake during this process.
Legal and ethical aspects of testing
Using the described tools outside of your own security perimeter or without the network owner's written consent is illegal. Computer security laws strictly regulate access to information systems. Ethical hacking It differs from cybercrime in that it has permission and clear boundaries for testing.
When auditing corporate networks, a signed agreement regulating the Scope of Work and Rules of Engagement must always be in place. Violating these rules can lead not only to legal liability but also to disruption of critical infrastructure.
The educational value of this knowledge is enormous, but it also requires a high degree of responsibility. Understanding the mechanisms of vulnerabilities allows security professionals to build more robust defense systems, anticipating the actions of potential attackers.
Frequently Asked Questions (FAQ)
Is it possible to hack WPA3 using Termux?
Directly cracking WPA3 by brute-forcing the handshake is impossible due to the use of the SAE (Simultaneous Authentication of Equals) protocol, which prevents offline attacks. Vulnerabilities may only exist in specific hardware implementations or when using weak passwords in transient modes.
Do you need root to use Aircrack-ng on Android?
For full functionality, including packet injection and switching to monitor mode, superuser (Root) privileges are almost always required. Without them, functionality is limited to passive scanning, which is available to regular applications.
What is the best Wi-Fi adapter for Termux?
Adapters based on Atheros (AR9271 series) and Ralink (RT3070) chips demonstrate the greatest compatibility. They support monitor mode and packet injection out of the box in most Linux distributions and Android builds.
Is Termux safe to use for network auditing?
Using the app itself is safe for your device if you trust the download source. However, running scripts from untrusted sources can compromise your phone. Always review the code before executing it.