What Is DNS Hijacking? – Complete Guide

Privacy is very important in today’s technologically advanced society. Let’s look at the example of a popular type of cyber threat, which is it. To answer these questions, let this blog explain to you what DNS hijacking is first. As this blog explains its for dummies and sets realistic measures, you will be equipped with ample knowledge in securing their network.

DNS Hijacking—Definition and Examples

DNS hijacking, commonly referred to as DNS redirection, refers to an act in which an attacker interferes with the Domain Name System queries. What the attack does is redirect the users to the actual website, but instead of the correct site, it brings them to other sites that contain spam and viruses. This can occur when the hackers gain control of the computers by putting in malicious ware, having full control of the routers, or even interfering with DNS messages.

For example, let us consider a case where one wanted to access a particular bank’s website. Instead of getting the legit site, what you end up getting is a replica that is as genuine as can be. It becomes dangerous if you are required to type your login details since the attackers will harvest your information.

Governments could equally employ it towards achieving censorship by re-directing users to the authorized websites.

Real-World Example:

Some Internet Service Providers (ISPs) use a form of it. They collect user data and display ads when users attempt to visit non-existent domains. This can be a nuisance and a privacy concern.

How Does a DNS Hijacking Attack Work?

It works by altering the DNS records associated with a domain name. Here’s how it typically happens:

• Domain Registration: When registering domain, it is associated with an IP address using DNS records as a link.
• DNS Hijacking: Hackers compromises these DNS records and to them modify the IP address to their own.
• Redirection: Phishing is the process where, when a user inputs your domain name in a browser, rather than accessing the real website of the target, they are re-directed to the attacker’s site.

For instance, whereas your domain may be business site dot com, an attacker can change your DNS settings and direct users to the phishing site. This can result in loss of data or intrusion by viruses and /or hackers.

How To Detect DNS Hijacking?

Detecting DNS hijacking can be tricky, but there are several signs and tools that can help:

• Slow Website Loading: If all the websites you usually use take a long time to load, then you can be sure that DNS Hijack is at work.

• Unexpected Pop-ups: For example, pop-ups that tell the user about a virus infestation on the computer are an indication that the site is fake.

• Ping a Network: These services reply on a ping tool, which should be run to check on suspicious domains. That is because if the IP address seems to be wrong, there is a likelihood that your DNS has been taken over.

• Check Your Router: An inexperienced user may not know that he or she has to access the web interface of the router and check the DNS configurations. If they have been changed, you could probably say that your router has been taken over.

• WhoIsMyDNS Tool: This online tool helps you know the DNS server that is handling your requests. If it’s unfamiliar, you may be among the affected users by it.

Types of DNS Hijacking Attacks

To effectively defend, it’s essential to know the different types of attacks:

• Local DNS Hijacking: Attackers install malware on a user’s computer and alter local DNS settings to redirect the user to malicious sites.

• Router DNS Hijacking: Hackers exploit weak router security to change DNS settings, affecting everyone who uses that router.

• Man-in-the-Middle (MITM) Attacks: In this type of attack, the hacker intercepts communication between the user and the DNS server, redirecting the user to a malicious site.

• Rogue DNS Server: Hackers modify DNS records on a DNS server, rerouting requests to malicious websites.

DNS Hijacking vs DNS Spoofing vs DNS Cache Poisoning

It is just one type of DNS attack. Let’s compare it with DNS spoofing and DNS cache poisoning:

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DNS Spoofing

DNS spoofing is one of the attacks where the attacker modifies the actual DNS information that makes the users connect to a fake site. Spoofing is different from hijacking in the sense that it does not necessarily knock off the victim’s site but rather tricks users into going to a fake site.

DNS Hijacking

In this, the attacker, therefore, has to wait for some time when some legal user logs in for further connections. After this, the attacker can assume active control over the particular session.

DNS Cache Poisoning

DNS cache poisoning is the process of replacing a DNS server’s cache records with the wrong data. This can be done by sending spoof DNS replies to the server numerous times, all of which are difficult to recognize, especially when DNSSEC is not functional.

By understanding it through our Cyber security course as well as implementing these security measures, you can better protect your network from cyber threats.

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How To Secure Your Network Against DNS Hijacking

Protecting your network from DNS hijacking involves several strategies:

1. Check Your Router’s DNS Settings

Regularly check your router’s DNS settings on the administration page to ensure they haven’t been changed. Update your router’s password frequently to prevent unauthorized access.

2. Use Registry Lock for Your Domain’s Account

A registry lock is a service offered by domain registries that prevents unauthorized changes to your domain’s DNS settings. This extra layer of security can prevent hackers from redirecting your domain to malicious sites.

3. Use Anti-Malware

Installing reliable anti-malware software can protect your system from malware that may target your DNS settings. Consider using secure VPNs to reduce the risk of data interception.

4. Implement Good Password Hygiene

Use complex passwords as well as update them regularly. Strong passwords that include a mix of characters are less likely to be compromised by hackers.

FAQs

What is a DNS cyber attack?

A DNS cyber attack targets the Domain Name System (DNS), redirecting users to malicious sites instead of the intended destination. This can lead to data theft or malware infections.

What is the crime of DNS hijacking?

It is a form of cybercrime where hackers manipulate DNS settings to redirect users to fraudulent websites, often for phishing or pharming purposes.

What is the difference between DNS spoofing and DNS hijacking?

DNS spoofing tricks users into visiting fake sites by altering DNS information, while it involves taking over an existing session after the user has connected to a legitimate site.

What is DNS takeover?

DNS takeover occurs when a hacker gains control of a DNS server, allowing them to manipulate DNS records and redirect users to malicious sites.