# Course #514: rizin-cutter for Penetration Testing
## Section 1: Introduction
### Overview of rizin-cutter
Rizin-Cutter is an advanced open-source reverse engineering platform that provides a graphical user interface (GUI) to the command-line tool "rizin." It is designed for binary analysis and can help penetration testers and security researchers analyze vulnerabilities, exploit weaknesses, and understand the inner workings of software. Its rich feature set includes disassembly, decompilation, graph visualization, and scriptability using the Rizin scripting language.
In this section, we will cover the installation and configuration of rizin-cutter on Kali Linux, delve into its functionalities, demonstrate step-by-step usage with real-world use cases, and provide detailed technical explanations to solidify your understanding of this powerful tool.
## Installation and Configuration on Kali Linux
### Prerequisites
Before installing rizin-cutter, ensure that your Kali Linux system is up to date. Open a terminal and execute the following commands:
"`bash
sudo apt update
sudo apt upgrade
"`
### Installing rizin-cutter
You can install rizin-cutter on Kali Linux by using the package manager or by building it from source. The easiest way is to install it directly from the repositories:
"`bash
sudo apt install rizin-cutter
"`
To verify the installation, you can check the version of rizin-cutter by running:
"`bash
rizin-cutter –version
"`
### Configuration
After installation, you may want to configure settings for your specific needs. You can find configuration files typically located in `~/.config/rizin-cutter/`. Adjust settings such as themes or default projects according to your preference.
## Step-by-Step Usage and Real-World Use Cases
### Basic Interface Overview
When you launch rizin-cutter, you will be greeted with a user-friendly GUI. The primary interface consists of:
– **Menu bar**: Access to file management, edit options, and tool settings.
– **Workspace**: Where the disassembled code and analysis results are displayed.
– **Output pane**: Displays messages, errors, and logs.
### Real-World Use Case: Analyzing a Malicious Binary
#### Step 1: Load a Binary
1. **Open rizin-cutter** by typing `rizin-cutter` in the terminal.
2. **Load a binary file** by selecting `File` > `Open` and navigating to the binary you wish to analyze.
#### Step 2: Disassemble the Binary
After loading the binary, you can disassemble it by:
– Right-clicking on the binary's entry point in the left panel and selecting `Disassemble`.
– Observe the assembly code in the workspace.
#### Step 3: Analyze Function Calls
1. **Navigate to the Functions panel** to view all recognized functions.
2. Click on a function to analyze its assembly instructions and possible behavior.
#### Step 4: Use Graph Visualization
Rizin-cutter allows you to visualize control flow:
1. Select a function and right-click.
2. Choose `Graph` > `Generate Graph`.
3. Analyze the flow of the function visually to identify potential vulnerabilities.
### Example: Simple Buffer Overflow
Let’s say you have a binary that is suspected of being vulnerable to a buffer overflow. Here’s how you could analyze it:
"`bash
# Open the binary
rizin-cutter vulnerable_binary
# Analyze and disassemble
# (Using the GUI, right-click on the entry function, and select Disassemble)
# Look for functions like strcpy, gets, or any unsafe operation
"`
### Code Example in Markdown
For integration with WordPress or other Markdown-supported platforms, you can format code snippets like this:
"`markdown
## Example: Dangerous Function Call
Consider the following C function:
"`c
#include
#include
void vulnerable_function(char *input) {
char buffer[50];
strcpy(buffer, input); // Vulnerable to buffer overflow
printf("Buffer contains: %sn", buffer);
}
"`
In this example, the usage of `strcpy()` without boundary checks can lead to a buffer overflow, which can be exploited.
### References for Further Learning
– [Rizin Official Documentation](https://rizin.re/docs/)
– [Kali Linux Tools](https://www.kali.org/tools/)
– [Buffer Overflow Exploitation Basics](https://owasp.org/www-pdf-archive/Buffer_Overflow_Exploitation.pdf)
## Conclusion
In this section, we covered the installation and configuration of rizin-cutter on Kali Linux, its basic usage, and a practical use case focusing on analyzing a vulnerable binary. As you progress through this course, you will gain deeper insights into advanced functionalities and unique features of rizin-cutter that will equip you to perform effective penetration tests and binary analyses.
Stay tuned for the next section where we will dive deeper into scripting and automation with rizin-cutter.
—
Made by pablo rotem / פבלו רותם