Null Byte Features

How To: Use LinEnum to Identify Potential Privilege Escalation Vectors

The art of privilege escalation is a skill that any competent hacker should possess. It's an entire field unto itself, and while it's good to know how to perform the techniques involved manually, it's often more efficient to have a script automate the process. LinEnum is one such script that can be incredibly useful for privilege escalation on Linux systems.

News: Hack Your Computer's BIOS to Unlock Hidden Settings, Overclocking & More

Your BIOS, or Basic Input Output System, is the firmware on your motherboard responsible for initializing your computer's hardware when it is first powered on. It probes for video adapters, RAM, the whole works. The BIOS provides a small library of basic input/output functions used to operate and control the peripherals such as the keyboard, text display functions and so forth, and these software library functions are callable by external software such as the OS and system software within sai...

SQL Injection 101: How to Avoid Detection & Bypass Defenses

It is often said that the best hackers remain unknown, and the greatest attacks are left undiscovered, but it's hard for an up-and-coming penetration tester or white hat to learn anything unless one of those factors is actually known or discovered. But the end goal here in our SQL injection lessons is to make that statement as true as possible for us when performing our hacks.

Hack Like a Pro: How to Scan for Vulnerabilities with Nessus

Welcome back, my tenderfoot hackers! Generally, you will want to perform a vulnerability scan before doing a penetration test. Vulnerability scanners contain a database of all known vulnerabilities and will scan your machine or network to see whether those vulnerabilities appear to exist. If they do, it is your job to test whether they are real and can be exploited.

Hack Like a Pro: How to Evade AV Software with Shellter

Welcome back, my tenderfoot hackers! One key area on the minds of all hackers is how to evade security devices such as an intrusion detection system (IDS) or antivirus (AV) software. This is not an issue if you create your own zero-day exploit, or capture someone else's zero-day. However, if you are using someone else's exploit or payload, such as one from Metasploit or Exploit-DB, the security devices are likely to detect it and spoil all your fun.

How To: Find OSINT Data on License Plate Numbers with Skiptracer

While conducting an OSINT investigation, it's important to be able to pull in information based on any clue you uncover. In particular, license plate information can turn up everywhere, from photos to live data to on your own street. You could use that data to find the VIN, see if a Tinder date has hit anyone, find out who's blocking your driveway, and so on. Skiptracer can help get the ball rolling.

How To: Linux Basics for the Aspiring Hacker: Using Ship for Quick & Handy IP Address Information

Whether you're white hat, black hat, or some shade in-between, navigating through a network is a core part of hacking. To do that, we need to be able to explore a network to discover the addresses of gateways, interfaces, and other attached devices. When ifconfig just isn't enough, you can steer your way around a network with a convenient tool called Ship, the script for everything IP.

How To: Hack TOR Hidden Services

A lot of people think that TOR services are unhackable because they are on a "secure environment", but the truth is that those services are exactly the same that run on any normal server, and can be hacked with the same tools (metasploit,hydra,sqlmap...), the only thing you have to do is launch a transparent proxy that pass all your packets through the TOR network to the hidden service.

How To: Crack SSH Private Key Passwords with John the Ripper

Secure Shell is one of the most common network protocols, typically used to manage remote machines through an encrypted connection. However, SSH is prone to password brute-forcing. Key-based authentication is much more secure, and private keys can even be encrypted for additional security. But even that isn't bulletproof since SSH private key passwords can be cracked using John the Ripper.

How To: Scan Websites for Interesting Directories & Files with Gobuster

One of the first steps in attacking a web application is enumerating hidden directories and files. Doing so can often yield valuable information that makes it easier to execute a precise attack, leaving less room for errors and wasted time. There are many tools available to do this, but not all of them are created equally. Gobuster, a directory scanner written in Go, is definitely worth exploring.

How To: Scan for Vulnerabilities on Any Website Using Nikto

Before attacking any website, a hacker or penetration tester will first compile a list of target surfaces. After they've used some good recon and found the right places to point their scope at, they'll use a web server scanning tool such as Nikto for hunting down vulnerabilities that could be potential attack vectors.

How To: Hunt Down Social Media Accounts by Usernames with Sherlock

When researching a person using open source intelligence, the goal is to find clues that tie information about a target into a bigger picture. Screen names are perfect for this because they are unique and link data together, as people often reuse them in accounts across the internet. With Sherlock, we can instantly hunt down social media accounts created with a unique screen name on many online platforms simultaneously.

How To: Use Burp & FoxyProxy to Easily Switch Between Proxy Settings

One of the best ways to dig into a website and look for vulnerabilities is by using a proxy. By routing traffic through a proxy like Burp Suite, you can discover hidden flaws quickly, but sometimes it's a pain to turn it on and off manually. Luckily, there is a browser add-on called FoxyProxy that automates this process with a single click of a button.

How To: Upgrade a Normal Command Shell to a Metasploit Meterpreter

When attempting to compromise a target, we want as much control as possible over the victim. Metasploit's meterpreter allows us to have immense control over the victim, the only issue is that sometimes we can't land a meterpreter. We may only be able to land a standard shell, but fear not, there is a way to upgrade our shell into the all powerful meterpreter!

Tutorial: Create Wordlists with Crunch

Greetings all. Before I get into the tutorial, I would like to mention that I am fairly new to Null Byte (been lurking for some time though), and what really appeals to me about this place is its tight, family-like community where everyone is always willing to help each other and the constant search for knowledge that inhabits this subdomain is a driving motivator for me to join in. I'm glad I arrived at the right time. Anyway, wipes tears (not really)...

How To: Beat LFI Restrictions with Advanced Techniques

One of the most common web application vulnerabilities is LFI, which allows unauthorized access to sensitive files on the server. Such a common weakness is often safeguarded against, and low-hanging fruit can be defended quite easily. But there are always creative ways to get around these defenses, and we'll be looking at two methods to beat the system and successfully pull off LFI.

How To: Hack Apache Tomcat via Malicious WAR File Upload

Web applications are a prime target for hackers, but sometimes it's not just the web apps themselves that are vulnerable. Web management interfaces should be scrutinized just as hard as the apps they manage, especially when they contain some sort of upload functionality. By exploiting a vulnerability in Apache Tomcat, a hacker can upload a backdoor and get a shell.

How To: Find Vulnerable Webcams Across the Globe Using Shodan

Search engines index websites on the web so you can find them more efficiently, and the same is true for internet-connected devices. Shodan indexes devices like webcams, printers, and even industrial controls into one easy-to-search database, giving hackers access to vulnerable devices online across the globe. And you can search its database via its website or command-line library.

How To: Use SQL Injection to Run OS Commands & Get a Shell

One of the ultimate goals in hacking is the ability to obtain shells in order to run system commands and own a target or network. SQL injection is typically only associated with databases and their data, but it can actually be used as a vector to gain a command shell. As a lesson, we'll be exploiting a simple SQL injection flaw to execute commands and ultimately get a reverse shell on the server.

How To: Make Your Own Bad USB

Hello, everyone! Many of you don't even know about my existence here on Null Byte, so I thought of contributing something rather interesting. Recently, someone asked how to make your own "Bad USB," and I promised to make a how-to on this topic. In addition, it would be nice to have something related on our WonderHowTo world. So here it is!

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.

How To: Easily Detect CVEs with Nmap Scripts

Nmap is possibly the most widely used security scanner of its kind, in part because of its appearances in films such as The Matrix Reloaded and Live Free or Die Hard. Still, most of Nmap's best features are under-appreciated by hackers and pentesters, one of which will improve one's abilities to quickly identify exploits and vulnerabilities when scanning servers.