Conducting Threat Hunting with CTI

Tutorial 2 of 5

Conducting Threat Hunting with CTI

1. Introduction

Brief Explanation of the Tutorial's Goal

This tutorial aims to guide you through the process of conducting Threat Hunting using Cyber Threat Intelligence (CTI). In today's world, with the ever-increasing threat from cyber-attacks, it is vital to have knowledge and skills in identifying potential threats.

What the User Will Learn

You will learn how to proactively identify threats and use this information to secure your HTML. You'll understand how to gather threat data, analyze it, and use it to strengthen your security measures.

Prerequisites

Basic knowledge of HTML, cybersecurity concepts, and some experience in web development would be beneficial.

2. Step-by-Step Guide

Detailed Explanation of Concepts

Cyber Threat Intelligence (CTI) refers to information that an organization uses to understand the threats that have, will, or are currently targeting the organization. This information is used to prepare, prevent, and identify cyber threats looking to take advantage of valuable resources.

Threat Hunting is a proactive security process where you are not waiting for alerts to tell you that you have a problem. Instead, you are actively looking for traces that an adversary might have left behind.

Clear Examples with Comments

Consider a scenario where your website has been receiving a lot of traffic from a particular IP address, and you suspect it could be a threat. You would gather data about this IP address, such as its geographical location, history of malicious activity, etc. Using this data, you could then formulate a defensive strategy, such as blocking traffic from this IP address.

Best Practices and Tips

Always be proactive in searching for threats, rather than reactive.
Keep your CTI up-to-date. Threats evolve quickly, so it's important to continuously update your intelligence.
Collaborate with others. Sharing information about threats can help everyone stay safer.

3. Code Examples

Example: Blocking an IP address in HTML

If you've identified a threatening IP address, you can use JavaScript along with HTML to block access. However, it is important to note that this is not a foolproof method since IP addresses can be easily faked or changed.

<!DOCTYPE html>
<html>
<body>

<script>
// Here we've identified the threatening IP address
var threateningIP = "192.0.2.1";

// This is a mock function to get the client's IP address
function getClientIP() {
    return "192.0.2.1";  
}

if(getClientIP() == threateningIP) {
    // If the client's IP address is the threatening one, we block access
    document.write("Access denied.");
} else {
    document.write("Welcome!");
}
</script>

</body>
</html>

Expected Output

If the client's IP address matches the threatening IP, they will see the message "Access denied." Otherwise, they will see the message "Welcome!".

4. Summary

Key Points Covered

An introduction to Cyber Threat Intelligence (CTI) and Threat Hunting
The importance of being proactive when it comes to cybersecurity
An example of how to gather data about a potential threat and take defensive action

Next Steps for Learning

To further your understanding of Threat Hunting with CTI, you can start by learning more about different types of threats, how CTI is gathered, and more advanced measures to protect against these threats.

Additional Resources

5. Practice Exercises

1. Gather data about a potential threat

Choose an IP address and gather data about it. Write a mock HTML page that would block access from this IP address.

2. Add more complexity to your threat hunting

Consider a scenario where you have multiple threatening IP addresses. Modify your HTML page to block access from all these IP addresses.

Solutions and Explanations

This exercise is similar to the code example provided above. Your solution should look similar, but with the IP address you chose.
Here, instead of a single threatening IP, you would have an array of threatening IPs. You would check if the client's IP is in this array to decide whether to block access.

Tips for Further Practice

Try to think of other ways you could identify and block threats. Could you use other types of data in addition to IP addresses? How could you handle threats that use changing IP addresses?