All digital companies that exchange information via the Internet with employees, users and customers are subject to DNS tunneling perpetrated by hackers to exfiltrate customer data. Find out how hackers practice this strategy and how to remedy it?
DNS Tunneling: Definition and consequence.
DNS tunneling or DNS tunneling strategy is the set of processes conducted by an attacker to steal sensitive data from a DNS server from a workstation infected with a virus. For further clarification, visit https://www.tips-of-the-day.com/. The DNS, also known as Domain Name Resolution, is a form of telephone directory that remembers and matches all URLs to their respective IP addresses so that internet traffic can flow smoothly. Thus, hackers using DNS tunneling exfiltrate your sensitive data and use it for blackmail or ransom. This can cost the company millions.
DNS tunneling: how it works and what solution to fix it
There is a DNS protocol that network administrators use to send simple queries to the server to finally get a response. It is this technique that hackers use. The hacker first hacks into a computer in the target company's private network. Then, he introduces a Horse of Three. This is software that records any information typed by the user of a computer and sends it to the hacker.
Thus, from the malware installed on the host, the hacker sends camouflaged requests via the computer to the server. These are unusual requests that the server executes. This allows the attacker to exfiltrate data from the DNS server for inappropriate use. For example, it can allow users to stumble upon inappropriate sites while browsing that they do not realise are there. It also allows the hacker to have knowledge of the data typed by the user on his host, such as passwords and other sensitive information related to the company in question. Therefore, to counteract the problem, a data analysis or payload analysis should be performed to detect DNS tunneling.
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