In the first section of this tutorial we will make our very own system call, followed by making a rootkit that hooks to our system call. I thought a good way to cap off a repo designed to introduce people to very basic C programming would be to take those very basic techinques and make a simple yet powerful security related program, namely a malicious shared library rootkit. Creating a Rootkit to Learn C 32 minute read Background Information. While most of this does not have a lot to do with a user-mode rootkit, a kernel level rootkit can leverage the installation of these drivers to install itself at the kernel level. Every time you run these programs, you will give hackers access to your computer. Since rootkits attempt to replace or modify anything considered a threat, this will tip off your system to their presence. Download Source code of Rootkit. However, most of the media attention given to rootkits is aimed at malicious or illegal rootkits used by attackers or spies to infiltrate and monitor systems. For example, timing differences may be detectable in CPU instructions. Rootkits enable other malware to hide within your device and may make it difficult or even impossible to clean out the infection. In the final part we will create a rootkit that hides a process of our choosing. To make matters even worse, the rootkit might modify the boot records, and, by removing it, you risk damaging your PC. And deploy after Encryption. This tutorial will focus on hooking system calls to perform these activities. Using IAT hooking, a rootkit can make changes to the DLL function calls list, replacing existing functions with its own address. In most cases, it would be dangerous and foolish for an attacker to use a virus when she requires stealth and subversion. Multi-Source Data Comparison – Rootkits, in their attempt to remain hidden, may alter certain data presented in a standard examination. I thought a good way to cap off a repo designed to introduce people to very basic C programming would be to take those very basic techinques and make a simple yet powerful security related program, namely a malicious shared library rootkit. This can effectively run the rootkit in ring 0, giving it the highest level of permissions. When an application makes an API call for that function, the rootkit code is loaded instead into the victim program’s memory space. They might also change the way standard applications work. A virus program is a self-propagating automaton. A hypervisor rootkit does not have to make any modifications to the kernel of the target to subvert it; however, that does not mean that it cannot be detected by the guest operating system. Memory rootkits hide in the RAM memory of your computer. 3. To make matters even worse, the rootkit might modify the boot records, and, by removing it, you risk damaging your PC. A rootkit is under the full control of a human attacker, while a virus is not. What does a rootkit do? Memory rootkit. But, while a rootkit might somehow be installed on a system through the use of a Trojan virus of some sort, the rootkit itself is not malware. The returned results of high and low-level system calls can give away the presence of a rootkit.