Collaborate Disseminate
Overview In the last blog post of the X86 Linux assembly series, we focused on how to make our Hello World payload friendly for use as a payload in exploits. However, we didn’t cover how to extract the payload itself for use in exploits. Sure you cou… Continue reading Linux X86 Assembly – How To Make Payload Extraction Easier
Overview In the last tutorial, we covered how to build a 32-bit x86 Hello World program in NASM. Today, we will cover how to do the same thing, but this time using the GAS toolchain instead. This will allow us to review the differences in the source … Continue reading Linux X86 Assembly – How to Build a Hello World Program in GAS
Today I want to continue the series on using LD_PRELOAD. In previous posts, we covered how to inject a shared object binary into a process, and use that to hijack a library function call to run our own code. This is great when we want to overwrit… Continue reading LD_PRELOAD: How to Run Code at Load Time
NMAP is a wonderful network scanner and its ability to log scan data to files, specifically XML, helps quite a bit. This enables the scan data to be parsed by other tools such as Metasploit’s db_import or even NMAP’s own Zenmap GUI. While XML is grea… Continue reading Converting NMAP XML Files to HTML with xsltproc
Overview Each week on Friday, we post a social media challenge known as “Detective Nevil Mystery Challenge”. On November 13th of 2020, we released a challenge that contained a payload and it was only solved by one person on twitter. That challenge is… Continue reading Solving the November 13th Detective Nevil Mystery Challenge
Today I wanted to continue the series on using LD_PRELOAD. In today’s post we are going to use LD_PRELOAD to hijack the rand() function in a simple random number guessing game to control the generation of random numbers and effectively be able to … Continue reading Not-So-Random: Using LD_PRELOAD to Hijack the rand() Function
Today I wanted to start what I plan to be a small series of blog posts about LD_PRELOAD. LD_PRELOAD is related to Linux based systems and revolves around the loader system and how shared object libraries resolve linker symbols when loading a dynami… Continue reading LD_PRELOAD – Introduction