DNS Layer Security Monitoring Service
DNS layer security monitoring services are critical for any organization because the Domain Name System (DNS) layer security helps stop cyberattacks.
Practically all internet activity is enabled by DNS. With something as simple as monitoring DNS requests, and their subsequent IP connections, can give you that distinct advantage in securing your network. By ensuring that only proper, legitimate connections are traversing your external interface, DNS-Layer Security places a “flag” on anomalous DNS activity. This can provide better accuracy and detection of malicious activity and help identify compromised internal systems and enhance network protection. Realistically, DNS-Layer security is one of the key steps in identifying anomalous connections, implementing effective countermeasures, and, if the connection is dangerous, blocking that DNS connection and subverting a possible compromise.
Many of today’s sophisticated attacks rely on some sort of DNS activity. Malware, ransomware, phishing, adware, and adware often use DNS during the initial staging of an attack. For example:
- DNS tunneling is often used to deliver payloads encoded in DNS queries and responses, it can exfiltrate data from compromised networks, and execute remote command and control attacks. A good example is the supply-chain attack SUNBURST leveraged DNS tunneling during post-exploitation, and the APT group OilRig frequently uses DNS tunneling for data exfiltration.
- DNS beaconing is often used to establish communication with a command-and-control (C2) server using only DNS, which is almost always allowed in a network. Most importantly, many high-profile ransomware attacks featured DNS beaconing during the initial stages of the attack.
These are just a small sample of the tactics, techniques, and procedures (TTPs) that often play a prominent role in modern cyberattacks. Now ask yourself, what am I doing to secure my DNS traffic?