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How To: Writing 64-Bit Shellcode - Part 1 (Beginner Assembly)

In this simple tutorial you will be shown step-by-step how to write local shellcode for use on 64-Bit Linux systems. Shellcode is simple code, usually written in assembly that is used as payload in exploits such as buffer overflow attacks. Payloads are the arrow head of an exploit: though the rest of the arrow is important for the delivery of the attack, the arrow head deals the killing blow. In reality, payloads are slightly less exciting yet far more interesting and intelligent than medieva...

How To: Every Mac Is Vulnerable to the Shellshock Bash Exploit: Here's How to Patch OS X

Heartbleed, move over. There's a new bug in town, and this time it's also affecting Mac and Linux computers. It's called Shellshock (its original official title is CVE-2014-6271), and it's currently got a 10 out of 10 severity rating over at the National Cyber Awareness System. While some updates have been issued to fix this bug, they were incomplete, and your system is probably still vulnerable, as it has been for the last probably 20 years.

How To: Hide Your WhatsApp Online and Last Seen Statuses from Everyone or Just Some of Your Contacts

By default, everyone on WhatsApp can see when you're using the app. If someone recently messaged you and sees you're currently online, they may think you're avoiding them if you don't respond right away — especially if you don't share read receipts. However, you can block them from seeing your online or last seen status and apply it to everyone or just specific contacts.

Exploit Development: How to Read & Write to a Program's Memory Using a Format String Vulnerability

Format strings are a handy way for programmers to whip up a string from several variables. They are designed to save the programmer time and allow their code to look much cleaner. Unbeknownst to some programmers, format strings can also be used by an attacker to compromise their entire program. In this guide, we are going to look at just how we can use a format string to exploit a running program.

How To: Detect BlueBorne Vulnerable Devices & What It Means

Armis Labs has revealed eight vulnerabilities, called "BlueBorne", which put 5.3 billion Android, iOS, Windows, and Linux devices that use Bluetooth at risk. With it, hackers can control devices, access data, and spread malware to other vulnerable devices through networks. In this post, we will learn about the vulnerabilities, then look at how to find devices that have them.

How To: The Ultimate Guide to Using the Duo Camera on Your HTC One M8

The camera situation on the all new HTC One is a little daunting. The M8 has not one, not two, but three camera lenses built in. First, there's the 5 megapixel selfie machine up front, then around back, there's the new Duo Camera with a refined UltraPixel sensor. HTC has done things differently here, and the UltraPixels and dual lenses means that the M8 doesn't necessarily take pictures like you'd expect—and that's not a bad thing. With a little guidance and some easy tricks, you can use all ...

How To: Use RedRabbit for Pen-Testing & Post-Exploitation of Windows Machines

RedRabbit is an ethical hacking toolkit built for pen-testing and reconnaissance. It can be used to identify attack vectors, brute-force protected files, extract saved network passwords, and obfuscate code. RedRabbit, which is made specifically for red teams, is the evil twin of its brother, BlueRabbit, and is the offensive half of the "Rabbit Suite."

How To: 15 Important Features and Changes in the iOS 15.5 and iPadOS 15.5 Updates

Apple's latest iPhone and iPad software, iOS 15.5 and iPadOS 15.5, became available on May 16, so you can download and install it right now if you haven't already. While there aren't as many new features as iOS 15.4 and iPadOS 15.4 had, there are a few big ones in the U.S. you'll want to know beyond Apple's minuscule "About this Update" information in the "Software Update" menu.

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: Start a Briggs and Stratton Power Generator After 3 Years

My Briggs and Stratton power generator wasn't used for 3 years. Trying to start it again, lead to some problems. The video will show you the true story and the solution. The first problem was, that it lost some fuel - the fuel pipe was broken. In good hope I tried again to start it, but it stopped within seconds. A check of the spark plug to find a very dirty one. After cleaning the spark plug, the engine ran, but only for a few seconds. It lost a lot of fuel and stopped again. The fuel was c...

Weekend Homework: How to Become a Null Byte Contributor

We're officially seeking Null Byters on a weekly basis who would enjoy taking their time to educate the community. Contributors will write tutorials, which will be featured on the Null Byte blog, as well as the front page of WonderHowTo (if up to par, of course). This is a job meant for anyone with the will to share knowledge. There is no need to be intimidated if you fear you lack the writing skills. I will edit your drafts if necessary and get them looking top-notch! You can write tutorials...

News: Null Byte Is Calling for Contributors!

We're officially seeking Null Byters interested in teaching others! Contributors will write tutorials, which will be featured on the Null Byte blog, as well as the front page of WonderHowTo (if up to par, of course). This is a job meant for anyone with the will to share knowledge. There is no need to be intimidated if you fear you lack the writing skills. I will edit your drafts if necessary and get them looking top-notch! You can write tutorials of any skill level, and anything you feel like...

Weekend Homework: How to Become a Null Byte Contributor (1/12/2012)

We're officially seeking Null Byters on a weekly basis who are willing to take the time to educate the community. Contributors will write tutorials, which will be featured on the Null Byte blog, as well as the front page of WonderHowTo (IF up to par, of course). There is no need to be intimidated if you fear you lack the writing skills. I will edit your drafts if necessary and get them looking top-notch! You can write tutorials of any skill level, about anything you feel like sharing that is ...

How To: fix the error "transaction was not successful"

So many of you like to save up your gold coins to buy things like castles, treasure cards and clothing. But sometimes when you buy something, an error message pops up. One of them is this extremely annoying one: "Transaction was not successful."This error happens mostly when buying clothes. Let's say you want to buy a robe, but it is too expensive. You change the color of the robe to brown, yellow or white and try to buy it. When you click Buy, the error pops up. You switch realms. No differe...

News: Lisa Nichols, Contributing Author of The Secret Discusses Continuing Education

Lisa Nichols, contributing author of The Secret and one of the great inspirational speakers of our time, believes the best way to stay motivated when continuing your education is to “begin with the end in mind.” Pushing forward through challenges is what makes accomplishment so gratifying. Every accomplishment leads to personal growth. Nichols believes that making the completion of your degree “non-negotiable” means that you will not settle for anything less.

How To: Things to Do on WonderHowTo (04/25 - 05/01)

WonderHowTo is a how-to website made up of niche communities called Worlds, with topics ranging from Minecraft to science experiments to Scrabble and everything in-between. Check in every Wednesday evening for a roundup of user-run activities and how-to projects from the most popular communities. Users can join and participate in any World they're interested in, as well as start their own community.

News: Hector Martin's Alternate DCPU-16 Proposal Would Allow for a Better C Compiler

The developer community has already made some incredibly quick progress on implementing assemblers, interpreters, and emulators for the proposed virtual computer in 0x10c, Notch's latest game. But the truth is that the majority of programmers out there couldn't be bothered with spending enormous amounts of time writing anything much more complicated than a "hello world" application in assembly. What's on the top of everybody's mind is creating a compiler for a more widely used language.

News: Top 25 Firefox Tweaks

How is it that we use Firefox tremendously and yet not care for its needs? You might have noticed Firefox sometimes tends to slow and not respond often. You might have installed countless add-on in Firefox to enhance your using experience, to get the most out of your Firefox use these Hacks. The about:config page contains all most all of the tweaks and enhancements available for Firefox to day.

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