DNS Exfiltration For Credit Card Theft

Securing the future of credit card transactions through DNS vigilance


Safeguarding your data, shielding your cards, through DNS mastery.

DNS exfiltration or tunneling refers to the unauthorized extraction of data from a network through DNS queries and responses. It's a technique often used by cyber attackers to bypass network security measures, as DNS traffic is commonly allowed to pass through firewalls and is not always closely monitored.

Enhanced Data Security

Enhanced Data Security

  • Implementing DNS security measures fortifies data protection, especially sensitive credit card data, building trust with customers and partners.
Improved Incident Response

Advanced Network Protection

  • Addressing DNS tunneling bolsters network security, preserving the integrity of your network infrastructure and safeguarding against cyber threats.
Compliance Assurance

Compliance Assurance

  • Countering DNS exfiltration ensures resilience against threats and maintains compliance with industry regulations, averting potential fines and reputational harm.
Business Agility and Resilience

Improved Reputation

  • Strengthening data security not only enhances your reputation but also fortifies your network, fostering trust among stakeholders and boosting competitiveness.
How It Works
  • Encoding Data: The attacker encodes data into DNS queries using formats like Base64 and appends it to their domain, effectively disguising the exfiltrated data.
  • DNS Query: The compromised system issues a DNS query containing the encoded data. Since DNS queries are often allowed to pass through firewalls and other security measures, the query reaches an external DNS server controlled by the attacker.
  • Data Collection: The attacker's DNS server receives, decodes, and stores the exfiltrated data, amassing sensitive information without detection.
  • Response: The attacker's DNS server may respond with further instructions, establishing a communication channel that enables ongoing data exfiltration and command delivery.
Why It's a Concern
  • Bypassing Security Measures: DNS exfiltration can bypass standard security measures because it exploits the DNS protocol, which is typically not blocked or closely monitored.
  • Stealthy: The technique can be difficult to detect because the data is often encoded and embedded in legitimate-looking DNS queries and responses.
  • Two-Way Communication: Besides data exfiltration, DNS tunneling can also be used for command and control communications, allowing attackers to send commands to compromised systems.
  • Data Volume: Attackers can transfer substantial amounts of data through DNS queries, making it a potent channel for data theft and exfiltration. This presents a significant challenge in identifying and stopping these covert data transfers.
Preventive Measures
  • Enhanced Monitoring: Monitor DNS traffic for unusual patterns, such as an abnormal volume of queries, uncommon query types, or queries to unknown domains.
  • DNS Security Protocols: Use DNS security protocols like DNSSEC to add a layer of security to DNS transactions, although this won't necessarily prevent DNS tunneling.
  • Firewall Rules: Configure firewall rules to allow DNS traffic only to known, trusted DNS servers.
  • Threat Intelligence: Employ threat intelligence services to identify and block traffic to malicious or suspicious domains.

DNS exfiltration or tunneling is a sophisticated method used by attackers to stealthily extract data or maintain communication with compromised systems. Organizations need to be vigilant, employing advanced monitoring and security measures to detect and mitigate such attempts to safeguard sensitive data and maintain network integrity.