Author Archives: Xavi

This post has been created for completing the requirements of the Pentester Academy Linux Assembly Expert Certification. Student ID: PA-8535 Before start this assignment, I have to say that this certification supposed some months of hard work but it’s completely … Continue reading →

This post has been created for completing the requirements of the Pentester Academy Linux Assembly Expert Certification. Student ID: PA-8535 For this assignment I have to modify three known shellcodes from Shell-Storm and create polymorphic versions of them. I’m going … Continue reading →

This post has been created for completing the requirements of the Pentester Academy Linux Assembly Expert Certification. Student ID: PA-8535 The assignment requests to analyze three shellcodes, during the statement Vivek name three tools, so I’m going to analyze the … Continue reading →

This post has been created for completing the requirements of the Pentester Academy Linux Assembly Expert Certification. Student ID: PA-8535 I’m going to create a custom encoder/decoder to modify an original shellcode and after recover it and execute it. The … Continue reading →

This post has been created for completing the requirements of the Pentester Academy Linux Assembly Expert Certification. Student ID: PA-8535 Egg hunter is a type of shell code that is basically a two stages payload. The first stage searches for … Continue reading →

This post has been created for completing the requirements of the Pentester Academy Linux Assembly Expert Certification. Student ID: PA-8535 Code structure: 1. Create a socket 2. Connect to a IP and port 3. Redirect STDIN, STDOUT and STDERR to … Continue reading →

This post has been created for completing the requirements of the Pentester Academy Linux Assembly Expert Certification. Student ID: PA-8535 To achieve the objective of creating a Bind Shell TCP, we need to understand the code structure that we need … Continue reading →

Following the SLAE course I found an interesting subject that is how to create an encoder to hide our original shellcode. In this case we are going to use the XOR operation because it has the following property: (A xor … Continue reading →

Hello, in this post I will explain how to use execve syscall in a shellcode using the stack technique, the purpose of this shellcode is the same as the last shellcode from the previous post. As I told you in … Continue reading →