Dynamic DNS Abuse: The Hidden Threat Behind Stealthy Cyber Attacks

Did you know hackers now use services that were designed for helping websites hide their locations when launching their attacks? Dynamic DNS (DDNS) is technology that allows website owners to change their server address easy and quick. Hackers can now use DDNS to notify the internet of their server addresses, preventing security teams from responding to their attacks.

How Hackers Use DDNS​

Hackers use DDNS to control their malware on a computer, as the server addresses can change quickly so the defenders can't find them quickly enough to block their attacks. Essentially, DDNS allows the attacker to be mobile and concealed.

Many DDNS providers fail to vet people who are using their service. As a result, hackers can easily use DDNS as an avenue for malicious networks without getting caught. Who would've thought a tool for websites serving a legitimate purpose could become a hacker's playground?

Why This Is Problematic​

Malicious actors can use DDNS to:

• Easily exert control over malware
• Negate detection
• Perpetuate attacks when some servers have been blocked

Even stout firewalls and antivirus products can find them difficult to catch as the attacks keep changing.

How to Protect Your Business​

So, what can you do? Here are a few quick suggestions:

• Monitor DNS behavior – Be suspicious of websites that frequently change IP addresses.

• Use threat alerts – Sign up for alerts about suspicious domains.

• Secure your networks - Prevent malware from spreading too easily.

• Keep your devices update – Update your computer and servers and watch for unusual activity.

Following those suggestions will increase the difficulty for hackers to exploit DDNS and decrease the chance of an attack.

Conclusion​

It's absurd that a tool designed for convenience can also be used to perpetrate a crime. Staying aware and prepared will help secure your systems. It's no different than watching your front door while thieves are trying endless tricks until they find one that works. DDNS abuse can be complicated, but you just need to take a few easy steps to fight back.