What is a Zero-Day DDoS Attack?

In a zero-day Distributed Denial of Service attack, the attackers exploit previously unknown security vulnerabilities in systems, networks, or applications to launch a DDoS. This sudden flood of traffic from multiple sources renders targeted services or websites unavailable.

Origins & Examples of Zero-Day DDoS Attacks

Many zero-day exploits have their origin in the dark web, where cybercriminals distribute exploits to the highest bidder. Dark web marketplaces also facilitate the sale of so-called booster/stresser services, otherwise known as DDoS-for-hire.

Recent Examples of DDoS Attacks

A recent example of this phenomenon was the discovery and exploitation of the TP240PhoneHome vulnerability. Flaws in the configuration of PBX-to-Internet gateways enabled attackers to abuse the systems, leading to DDoS attacks which caused substantial disruption to targeted organizations.

Here’s another example: in July 2020 the FBI alerted the corporate world about four new DDoS attack vectors: CoAP (Constrained Application Protocol), WS-DD (Web Services Dynamic Discovery), ARMS (Apple Remote Management Services) and Jenkins web-based automation software. The vulnerabilities had been active for at least 12 months prior to this warning.

Understanding Zero-Day Attacks

Zero-day attacks catch victims off guard because they have not had a chance to prepare by patching or otherwise mitigating the flaws in the affected systems.

Zero-day exploits are typically only obtained after extensive work. A security researcher must first locate a weakness in a system, network or application. Developing an exploit based on the vulnerability further requires significant technical expertise, resources, time and effort.

To develop a valuable zero-day threat, the attacker needs:

• In-depth knowledge of the targeted system
• Reverse engineering skills to analyze and understand how the vulnerability works
• Some level of programming proficiency to craft a custom exploit

Defending Against Zero-Day DDoS Attacks

Defending against zero-day DDoS attacks is challenging, but possible. Organizations must begin by taking proactive measures, such as:

• Continuous Vulnerability Scanning : Regularly scanning systems for vulnerabilities and conducting penetration tests can identify weaknesses which could be exploited by attackers.
• Security Awareness Training: Staff education plays an important role in preventing successful attacks. Employees must be able to recognize phishing attempts, avoid opening suspicious links or attachments, and appropriately report suspected security incidents.
• Adaptive Security Solutions: Security tools that analyze network traffic can identify patterns and packet characteristics indicative of an unfolding DDoS attack. These devices can then take appropriate DDoS protection measures, including filtering malicious traffic and alerting staff of anomalous behavior.
• Incident Response Planning: A well-rehearsed incident response plan can minimize the impact of zero-day attacks. The plan should include steps for detecting, mitigating, and recovering from security incidents.

Focus on Zero-Day Vulnerabilities

Here are some strategies organizations can use to reduce the potential attack surface:

• Patch Management: While it’s not a silver bullet against zero-day attacks, ensuring all software and firmware is up-to-date can reduce the impact of the attack, slows the spread of an incident, and mitigates potential damage.
• Threat Intelligence : Staying informed about emerging zero-day vulnerabilities enables organizations to anticipate and prepare for new threat actors before they become widespread.
• Collaboration & Information Sharing: Establishing information-sharing procedures within the community, including collaborations with security researchers and software vendors, can help organizations stay ahead of the latest threats.

Recommendations for CSOs

Acknowledging the risk of zero-day DDoS attacks and taking proactive steps to mitigate the threat is imperative for CSOs. Here are some of our recommendations:

• Prioritize Zero-Day Risk: Elevating the priority of zero-day risk mitigation is a reasonable step to take. By dedicating time and budget to security areas like threat intelligence, vulnerability management, and incident response, CSOs can reduce the likelihood of being unprepared for an attack.
• Invest in Advanced Security: Implement robust layers of security to address the threat from a technological standpoint. This can include implementation of AI-powered threat detection, behavioral analytics, and real-time monitoring solutions to identify and block malicious traffic.
• Build Resilient Infrastructure: The ability to absorb and adapt to unexpected, dynamic attack patterns is key to minimizing downtime and ensuring business continuity. Redundant systems, load balancing, and DDoS mitigation equipment all establish resiliency in the face of evolving threats.

By following these recommendations, CSOs take the lead in protecting their organization from the threat of zero-day DDoS attacks.

Secure Your Organization with Check Point DDoS Protector

Zero-day DDoS attacks exploit undisclosed vulnerabilities in systems, blindsiding the victim with a sudden overwhelming volume of traffic that disrupts operations, rendering services unavailable for use. The growing threat of these attacks necessitates that organizations prioritize implementation of effective zero-day protection strategies to safeguard valuable business assets.