Course #692: Introduction to whatweb$ on Kali Linux
# Course #692: Introduction to whatweb$ on Kali Linux
## Installation and Configuration on Kali Linux
### Installing WhatWeb
To begin, we need to ensure that `whatweb$` is installed on your Kali Linux system. `WhatWeb` is a web scanner that identifies web technologies used by a website. This includes everything from the web server software to the specific content management system (CMS) being utilized.
You can easily install WhatWeb using the following commands in your terminal:
sudo apt update
sudo apt install whatweb
This command first updates the package list for your system and then installs WhatWeb. Verify the installation by checking the version:
If the installation was successful, you should see the installed version of WhatWeb displayed in the terminal.
### Configuration
WhatWeb is generally ready to use out of the box, but you may want to configure some options based on your needs. One of the key configuration files is located at `/etc/whatweb.conf`. This file allows you to customize various parameters, such as enabling or disabling specific plugins.
To edit the configuration, open the file in your favorite text editor:
sudo nano /etc/whatweb.conf
In this configuration file, you will find sections for various plugins that WhatWeb uses to identify technologies. You can enable or disable these plugins based on your requirements. An example entry might look like this:
[/dm_code_snippet]plaintext
# Enable or disable plugins
plugin=all
[/dm_code_snippet]
To save your changes in nano, press `CTRL + X`, then `Y`, and hit `Enter`.
## Step-by-Step Usage of WhatWeb
### Basic Command Structure
The basic command structure for using WhatWeb is:
– `options`: Various flags that modify the behavior of the tool.
– `URL`: The target website you want to analyze.
### Example Usage
To see a simple output of the technologies used by a website, you can run:
whatweb https://example.com
This command will return a concise view of the technologies utilized by the website, such as server type, CMS, and libraries in use.
### Using Options
WhatWeb offers numerous options to customize how it gathers information. Here are some of the most useful options:
– `-v`: Verbose output. This provides additional details about the scan.
– `-a`: Set the user-agent string to mimic a specific browser or device.
– `-i`: Input file that contains a list of URLs to scan.
– `-t`: Set threads for parallel requests (default is 5).
For instance, if you want to conduct a scan with verbose output and a custom user agent, you can do:
whatweb -v -a "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3" https://example.com
### Real-World Use Cases
1. **Identifying Web Technologies**: WhatWeb can help penetration testers identify the technologies in use for a specific target, which can inform attack vectors. For instance, recognizing that a site uses WordPress may lead to specific plugin vulnerabilities.
2. **Security Assessment of Third-Party Services**: If your organization relies on third-party services, using WhatWeb to analyze these services can uncover risks related to outdated software or insecure configurations.
3. **Pre-Engagement Research**: Before launching a penetration test, using WhatWeb as part of your reconnaissance phase can help build a profile of the target's web infrastructure.
### Code Examples for WordPress
When targeting WordPress sites, WhatWeb can reveal the CMS and its plugins. For example, running the following command:
whatweb -v –color https://examplewordpresssite.com
Might output:
[/dm_code_snippet]plaintext
https://examplewordpresssite.com [WordPress, 5.8.1, PHP, jQuery, Yoast SEO]
[/dm_code_snippet]
This output indicates that the site is using WordPress version 5.8.1, along with PHP and jQuery, and has the Yoast SEO plugin installed.
#### Checking for Vulnerable Plugins
You can also create a simple script in Bash to automate scanning for WordPress vulnerabilities using WhatWeb. Below is an example that checks a list of WordPress sites:
#!/bin/bash
echo "Scanning WordPress sites for vulnerabilities…"
# List of WordPress sites
declare -a sites=("https://examplewordpresssite1.com" "https://examplewordpresssite2.com" "https://examplewordpresssite3.com")
for site in "${sites[@]}"
do
echo "Scanning $site…"
whatweb -v –color "$site" | grep -E 'WordPress|VulnerablePlugin'
done
This script scans multiple WordPress sites and filters the output to identify instances of WordPress and any potentially vulnerable plugins.
### JSON Output for Further Analysis
WhatWeb can also output results in JSON format, which is useful for further analysis or integration with other tools:
whatweb -j https://example.com
This will produce a JSON object similar to:
[/dm_code_snippet]json
{
"url": "https://example.com",
"technologies": [
"WordPress",
"PHP",
"jQuery"
],
"server": "Apache/2.4.41"
}
[/dm_code_snippet]
You can then parse this JSON output using tools like `jq` for custom reporting or further automation.
## Detailed Technical Explanations
### Technology Detection
WhatWeb employs a plugin-based architecture for technology detection. Each plugin is designed to identify a specific technology based on patterns. This could include HTTP headers, HTML elements, JavaScript files, etc.
For instance, to identify WordPress, WhatWeb might look for certain `meta` tags or specific URLs that are commonly associated with WordPress installations.
The efficiency of this detection lies in its ability to analyze both the front-end and back-end characteristics of the target website, thus providing a comprehensive view of the technology stack.
### Limitations
While WhatWeb is a powerful tool, it’s not without limitations. Some websites may block automated scanners or provide misleading information to prevent detection. Additionally, if a website employs heavy obfuscation techniques, WhatWeb may fail to identify certain technologies.
To mitigate these issues, penetration testers should combine WhatWeb with other tools, such as Wappalyzer or built-in browser inspection features, to triangulate the technologies in use.
## External Reference Links
– [WhatWeb GitHub Repository](https://github.com/urbanadventurer/WhatWeb): The official GitHub repository for WhatWeb, where you can find the source code, additional plugins, and release notes.
– [OWASP Web Security Testing Guide](https://owasp.org/www-project-web-security-testing-guide/): A comprehensive resource for web security testing that includes various methodologies and tools, including WhatWeb.
– [Common Vulnerabilities and Exposures (CVE)](https://cve.mitre.org/): A database to search for known vulnerabilities related to specific web technologies.
By utilizing WhatWeb effectively, penetration testers can gain critical insights into a target's web application, aiding in the identification of potential security risks.
—
Made by pablo rotem / פבלו רותם
