In the previous blog, I discussed some of the basic C program’s disassembly structures, concentrating on the variables and their memory layouts. This article, a follow-up to the previous one, focuses on basic operations and functions in C programs. In the previous blogs, we have seen what an empty C program looks like void main() {} Disassembly: main: push rbp mov rbp, rsp nop pop rbp ret Arithmatic operators Now if we want to work with operations, we’ll have to add 2 local variables to the function....

Reverese engineering is a powerful tool for any software developer. However, as with any tool, it is only as good as the person using it. Understanding reverse engineering and how to use it is essential for both novices and seasoned developers. According to wikipedia, Reverse engineering, also called back engineering, is the process by which a man-made object is deconstructed to reveal its designs, architecture, or to extract knowledge from the object; similar to scientific research, the only difference being that scientific research is about a natural phenomenon....

PAM - What and Why Authenticating a user to a service used to be a time-consuming process. The application had to be aware of all possible authentication mechanisms and had to be rebuilt every time a new authentication method was introduced… As a result, there was a significant amount of code repetition. Naturally, it was disliked by everyone!! As a result, the concept of a middle-ware application responsible for user authentication to a service arose....

Audits are critical for system administrators to detect security violations and track security-relevant information on their systems. Anyone concerned about the security, stability, and proper operation of their Linux servers should conduct an audit. How to do auditing in linux One simple way is to use the history command to observe the shell’s history, but this has many limitations. One of them is that this command is only applicable to the current user....

Malware has been used numerous times by attackers to destroy a computer’s Master Boot Record, rendering it inoperable. By erasing the MBR, the machine is unable to load the operating system. There is no easy way to rewrite the Master Boot Record into place without an operating system, and the machine becomes completely useless and unrecoverable. In addition, many ransomwares infect the master boot record by overwriting it with malicious code....