DNS data exfiltration is an attack tactic that uses DNS queries and responses to surreptitiously remove sensitive data from a network.
These DNS queries, which are sent on to a malicious DNS server under the attackers’ control, contain the data cyber criminals wish to exfiltrate. The data exfiltration is finished when the malicious DNS server decodes the information contained in the DNS query.
The target network is accessible to cybercriminals. This can be achieved in a number of ways, including phishing, malware, and taking advantage of security vulnerabilities in the network.
Once on the network, the hackers identify what information they want to steal like consumer personal informations, financial data.The data that has been detected is then encoded and incorporated into DNS searches.
By implementing a variety of security measures, such as blocking known malicious domains or IPs based on reputation or threat intelligence, keeping an eye out for odd or suspicious DNS query strings, utilizing DNS security services and technologies to prevent access to malicious domains, and monitoring both inbound and outbound DNS queries, businesses and organizations can prevent DNS tunneling.
