How DNS history can help with security investigations – Guide
DNS monitoring is used to manage and ensure the security of direct communications between browser users and the websites and services they use. Regardless of whether your company is responsible for managing one or multiple website domains, DNS monitoring can help you quickly diagnose problems, prevent targeted attacks, and easily detect any security breaches that may occur. Effective DNS monitoring consists of regularly checking DNS records for unexpected changes or local outages (whether due to manual error or hacking). This allows your team to quickly identify and resolve any issues that could negatively affect your site or the safety of your users who need to access your site. The Domain Name System (DNS) contains records that contain information about a specific domain name. These records include, but are not limited to, the corresponding Internet Protocol (IP) address, Mail Exchange server (MX), and name server (NS). use malware. And organizations today have every reason to make protecting against cybercrime a priority, as it can be very expensive not to. These domains and subdomains are not reported as malicious, so they cannot be flagged by security systems that do not implement IP-based blocking and monitoring. However, as they are the only ones to resolve the malicious IP address (at least at the time of writing), this could indicate involvement in suspicious activity.
DNS history can help with security investigations
Detect potentially malicious domains
So monitoring DNS history is essential for businesses and below are three specific reasons. One of the most important pieces of information DNS history provides is a list of domain names that resolve to the same IP address. For example, malicious IP address 157[.]230[.]221[.]198 is associated with delta9k[.]com and five of its subdomains, including mumble[.]delta9k[.]com and record[.] delta9k[. ]with. These domains and subdomains are not reported as malicious, so they cannot be flagged by security systems that do not implement IP-based blocking and monitoring. However, as they are the only ones to resolve the malicious IP address (at least at the time of writing), this could indicate involvement in suspicious activity. Networks are more secure when security teams examine traffic to and from these domains and subdomains. Various types of cyberattacks can be mitigated by discovering domains associated with malicious IP addresses. Phishing and malware campaigns are among them as they use domain names as weapons.
Help prevent and recover from DNS hijacking
Regularly tracking your DNS history records will help you identify signs of DNS hijacking, a common type of DNS attack. DNS hijacking occurs when threat actors change your DNS settings after gaining unauthorized access to your system. They may change IP resolutions to redirect your site visitors to a site under their control. This website serves as a gateway for attackers to steal sensitive information from users on your network. However, if you can immediately detect a sudden change in IP resolution by monitoring DNS history, you can investigate and mitigate attacks before they do any more damage. Accessing your historical DNS records also helps to restore them and correct changes made by attackers.
Protect brand reputation
Preventing and detecting cyberattacks early is a form of brand protection, as these processes help prevent reputational damage caused by cybercrimes. In addition to dubious IP addresses, DNS history lets you stay away from suspicious cyber resources such as NSs and email servers that attackers can use by detecting them before allowing them to access your network. DNS history also helps detect malware Command and Control (C&C) servers. This allows organizations to combat denial-of-service (DoS) attacks, in which a computer network known as a “botnet” sends bogus requests to a website until it crashes and becomes unavailable to legitimate visitors. Botnets often communicate with C&C servers, so shutting down these servers would help stop the attack.
Final note
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