DNS hijacking is a cyberattack where threat actors manipulate DNS responses to redirect users to malicious websites. It's a growing threat in the digital world, often used to launch phishing attacks or spread malware. This article explores how DNS hijacking works, notable incidents, and how to protect against it.
How does DNS hijacking work?
DNS hijacking, also called DNS redirection, involves tampering with DNS queries that translate domain names into IP addresses. Attackers can redirect users from a trusted site to a malicious one without their knowledge.
There are several techniques:
Compromising DNS servers: Hackers infiltrate legitimate DNS infrastructure to alter domain records.
Local malware infections: Malicious software changes a device's DNS settings, rerouting traffic.
Man-in-the-middle attacks: Intercepting DNS queries on their way to legitimate servers and substituting malicious responses.
What are some recent examples of DNS hijacking?
In May 2025. Curve Finance, a DeFi protocol, experienced its second DNS hijacking in a week. Users were redirected to a malicious website, prompting urgent warnings.
Another significant campaign, "Sea Turtle," compromised over 40 organizations across the Middle East and North Africa. The attackers altered DNS records to conduct long-term espionage.
How can you protect against DNS hijacking?
Use secure DNS providers with DNSSEC (Domain Name System Security Extensions).
Encrypt DNS queries using DNS over HTTPS (DoH) or DNS over TLS (DoT).
Monitor DNS records regularly for unauthorized changes.
Enable multi-factor authentication on DNS management portals.
Keep software and systems up to date to patch vulnerabilities.
Enterprises should consider aligning with standards like ISO 27001:2022. which emphasize AI-driven DNS security and threat filtering.
Conclusion
DNS hijacking is a serious threat that undermines internet trust and security. By understanding how it works and taking preventive measures, individuals and organizations can defend against data theft and malicious redirections.
