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How To: Use the Chrome Browser Secure Shell App to SSH into Remote Devices

Many guides on Null Byte require using the Secure Shell (SSH) to connect to a remote server. Unfortunately for beginners, learning to use SSH can become a confusing mix of third-party programs and native OS support. For Chrome OS users, using SSH is even more difficult. We'll fix this by using the Chrome Secure Shell to establish an SSH connection from any device that can run a Chrome browser.

How To: Create a Native SSH Server on Your Windows 10 System

With the addition of the OpenSSH client and server in the Windows 10 Fall Creators Update, you no longer have to rely on third-party programs to open an SSH server and connect to a Windows machine. While still a beta feature, this represents a long-overdue update fulfilling a promise made back in 2015.

Coinbase 101: Fees & Fine Print You Need to Know Before Trading Bitcoins & Other Cryptocurrencies

Coinbase is the primary go-to for many users when it comes to investing in Bitcoin (BTC), Ethereum (ETH), Litecoin (LTC), Ripple (XRP), and more, due to its user-friendly interface. But before you join them, know that the ease of use comes with a price. Coinbase charges fees for each transaction, and your bank might even add charges on top of that. Plus, there is some fine print to be aware of.

How To: Log into Your Raspberry Pi Using a USB-to-TTL Serial Cable

Connecting to your headless Raspberry Pi on the go typically requires a network connection or carrying around bulky peripheral hardware like a screen and keyboard. With the help of an old-school connecting standard, though, you can log into your Pi from any computer using a simple cable. If you don't have a power source, you can also power your Linux distro over the cable at the same time.

How To: Install & Use the Ultra-Secure Operating System OpenBSD in VirtualBox

OpenBSD implements security in its development in a way that no other operating system on the planet does. Learning to use the Unix-like operating system can help a hacker understand secure development, create better servers, and improve their understanding of the BSD operating system. Using VirtualBox, the OS can be installed within a host to create a full-featured test environment.

How To: Create an Evil Access Point with MitmAP

The threat of an evil access point has been around for a long time, and with the rise of open public Wi-Fi, that threat is often overshadowed by how comfortable we are using third-party Wi-Fi hotspots at coffee shops and public spaces. While we've shown an evil twin attack using the Aircrack-ng suite of tools, MitmAP is a Python tool to configure custom APs for many types of wireless attacks.

How To: Write an XSS Cookie Stealer in JavaScript to Steal Passwords

JavaScript is one of the most common languages used on the web. It can automate and animate website components, manage website content, and carry out many other useful functions from within a webpage. The scripting language also has many functions which can be used for malicious purposes, including stealing a user's cookies containing passwords and other information.

Hacking Pranks: How to Flip Photos, Change Images & Inject Messages into Friends' Browsers on Your Wi-Fi Network

Networking is built largely on trust. Most devices do not verify that another device is what it identifies itself to be, so long as it functions as expected. In the case of a man-in-the-middle attack, we can abuse this trust by impersonating a wireless access point, allowing us to intercept and modify network data. This can be dangerous for private data, but also be fun for pranking your friends.

How To: Gain Complete Control of Any Android Phone with the AhMyth RAT

There are more than 2 billion Android devices active each month, any of which can be hacked with the use of a remote administration tool, more commonly known as a RAT. AhMyth, one of these powerful tools, can help outsiders monitor a device's location, see SMS messages, take camera snapshots, and even record with the microphone without the user knowing.

How To: Hide DDE-Based Attacks in MS Word

In a previous article, we learned how to take advantage of a feature, Dynamic Data Exchange (DDE), to run malicious code when a Microsoft Word document is opened. The biggest challenge of this attack is that it requires getting the user to agree to a pop-up prompt. Fortunately, since I posted that article, many new obfuscation techniques have been discovered to make this easier. Today, we explore and combine some of them to make the ultimate hidden DDE attack.

How To: Exploit DDE in Microsoft Office & Defend Against DDE-Based Attacks

In our previous article, we learned how to take advantage of a feature, Dynamic Data Exchange (DDE), to run malicious code when an MS Word document is opened. Because Microsoft built DDE into all of its Office products as a way to transfer data one time or continuously between applications, we can do the same thing in Excel to create a spreadsheet that runs malicious code when opened. The best part is, it will do so without requiring macros to be enabled.

How To: Protect Yourself from the KRACK Attacks WPA2 Wi-Fi Vulnerability

In October of 2017, Mathy Vanhoef released "Key Reinstallation Attacks: Forcing Nonce Reuse in WPA2." This paper demonstrates a way to decrypt traffic on practically any WPA2 network, the most commonly used form of wireless security (seeing as all other forms of Wi-Fi encryption have already been broken). Practically all of the network-connected devices we use will need to be updated in some way in order to protect against this vulnerability, each of them in a different way.

How To: Generate Private Encryption Keys with the Diffie-Hellman Key Exchange

When we are building programs that communicate over a network, how can we keep our data private? The last thing we want is some other lousy hacker sniffing our packets, so how do we stop them? The easy answer: encryption. However, this is a very wide-ranging answer. Today we're going to look specifically at how to encrypt data in Python with dynamically generated encryption keys using what is known as the Diffie-Hellman key exchange.

How To: Use Pupy, a Linux Remote Access Tool

In one of my previous articles, I discussed ShinoBot, a remote administration tool that makes itself obvious. The goal is to see if the user could detect a remote administration tool or RAT on their system. In this article, I'll be demonstrating the use of Pupy, an actual RAT, on a target Ubuntu 16.04 server.

How To: Use Private Encrypted Messaging Over Tor

Tor is an excellent obfuscation network for web traffic, and while instant messaging over the network is very useful, it can be relatively difficult to configure. In this guide, we'll look at two synchronous communications platforms (instant messengers) which can be routed over the Tor network, Ricochet and XMPP.

How To: Fully Anonymize Kali with Tor, Whonix & PIA VPN

Hacking from a host machine without any form of proxying is reckless for a hacker, and in a penetration test, could lead to an important IP address becoming quickly blacklisted by the target. By routing all traffic over Tor and reducing the threat of malicious entrance and exit nodes with a VPN, we can configure Kali to become thoroughly private and anonymous.

How To: Exploring Kali Linux Alternatives: How to Get Started with BlackArch, a More Up-to-Date Pentesting Distro

In 2013, Offensive Security released Kali Linux, a rebuild of BackTrack Linux derived from Debian. Since then, Kali has gone on to become somewhat of a standard for penetration testing. It comes preconfigured with a collection of tools accessible by a menu system, tied together with the Gnome desktop environment. However, Kali Linux isn't the only penetration-testing distribution available.

How To: Wardrive on an Android Phone to Map Vulnerable Networks

Tossing an old Android smartphone with a decent battery into your hacking kit can let you quickly map hundreds of vulnerable networks in your area just by walking or driving by them. The practice of wardriving uses a Wi-Fi network card and GPS receiver to stealthily discover and record the location and settings of any nearby routers, and your phone allows you to easily discover those with security issues.

How To: Seize Control of a Router with RouterSploit

A router is the core of anyone's internet experience, but most people don't spend much time setting up this critical piece of hardware. Old firmware, default passwords, and other configuration issues continue to haunt many organizations. Exploiting the poor, neglected computer inside these routers has become so popular and easy that automated tools have been created to make the process a breeze.

HoloLens Dev 101: How to Create User Location Hotspots to Trigger Events with the HoloLens

One of the truly beautiful things about the HoloLens is its completely untethered, the-world-is-your-oyster freedom. This, paired with the ability to view your real surroundings while wearing the device, allows for some incredibly interesting uses. One particular use is triggering events when a user enters a specific location in a physical space. Think of it as a futuristic automatic door.

HoloLens Dev 101: The Unity Editor Basics

With any continuously active software, it can start to become fairly complex after a few years of updates. New features and revisions both get layered into a thick mesh of menu systems and controls that even pro users can get bewildered by. If you are new to a certain application after it has been around for many years, it can be downright intimidating to know where to begin.