The Internet has become an essential part of our daily lives: the success of contemporary businesses relies heavily on their information and computing systems (ICS), online presence and innovative digital initiatives. However, alongside technological advances, there is a growing threat from cybercriminals, who use various sophisticated cyberattack methods to damage or disrupt critical company resources and equipment. One of the most common and dangerous forms of these cyberattacks is the DDoS attack. Its main goal is to create a denial of service (DoS) for part or all of the victim’s ICS, which can lead to significant damage and financial loss for the business. In this article, we explain what a DDoS attack is, what potential factors can cause it and how companies can effectively protect against it.
DDoS: What is it in simple terms
A DDoS (Distributed Denial of Service) attack is a coordinated attack on an information and computing system that is launched simultaneously from multiple sources with the aim of disabling it. Simply put, a hacker floods your website with countless requests, which overloads the server, network, or any software service that normally serves your users, rendering the site inaccessible. Unlike a standard DoS attack, a DDoS attack is distributed, meaning it involves a wide range of different devices working together. This highlights the real threat aspect of DDoS attacks: blocking the source of malicious traffic is often ineffective, as it comes from a variety of sources, making it difficult to distinguish between malicious activity and normal user behavior. So, how does an attacker manage to control hundreds or even thousands of computers at once? Surprisingly, they don’t need to buy or even rent all that hardware. Instead, they often exploit vulnerabilities in existing devices or use botnets (networks of compromised machines) to launch their attacks.
When a hacker launches a DDoS attack, they exploit a botnet – a collection of devices that have been unknowingly infected with malware. The infection can occur in a variety of ways, such as through phishing emails or malicious downloads. The malicious software may lie dormant on a computer for a long time, completely unnoticed by the user. However, at a certain point, once activated by the creator, the virus forces the device to flood a selected target with countless requests, thereby significantly contributing to the attack. These infected devices can simultaneously make hundreds of thousands or even millions of requests to the targeted system, ultimately causing it to crash under the sheer volume of traffic. The more infected devices involved in the attack, the more challenging it becomes to create an effective defense against it. However, this does not mean that one should refrain from taking preventive measures. A prolonged server outage can result in significant financial losses and reputational damage, so it is essential to build a strong defense system, as well as anticipate why an attacker might target you in the first place.
Causes of DDoS attacks
DDoS attacks can have a variety of reasons, from cold calculations to emotional outbursts. Below we will look at the key motives that cybercriminals are guided by when attacking large organizations and individual users. The consequences of such attacks are sometimes large-scale and long-term.
- Sometimes the attack turns into an expression of resentment or a desire for retribution. The role of the attacker can be, for example, a former employee who wants to “take revenge” on the company from which he left on a negative note. In such cases, DDoS is used as a tool of sabotage: access to web resources is blocked, customers are lost, and the business’s reputation is damaged. The desire to inflict harm in response to injustice sometimes pushes people to extreme measures, especially in a virtual environment, where the consequences are felt, but remain “invisible”.
- Financial blackmail is one of the most common scenarios. Criminals launch an attack and then demand a ransom to stop it. Sometimes the threat escalates: “Either you pay or we’ll destroy your traffic.” This form of pressure can paralyze the work of companies and create an atmosphere of panic and uncertainty among employees. It is extremely hopeless to give in to blackmailers – it can make you a target for future attacks and show other hackers that this method works.
- Sometimes dirty tricks are used in the business environment. Some market players order DDoS attacks on competitors’ websites in order to disable them at key periods – for example, on the eve of sales or when launching a new advertising campaign. As a result, potential customers are lost, and the audience’s trust in the brand is undermined. Such aggressive competition destroys the rules of a fair game and turns market competition into a war where no means are chosen.
- Hacktivists often use DDoS attacks as a means of expressing opposition to the decisions and actions of governments, large corporations, or non-governmental organizations. Such cyberattacks have the potential to disrupt key services and infrastructure that play a critical role in the stable functioning of target entities. The consequences of such attacks can be critical for all parties involved.
- Sometimes a distributed denial of service attack plays a secondary role – it is used as a cover for other, more complex and destructive operations. For example, during a DDoS attack, protected systems may be simultaneously penetrated with the aim of stealing important and classified information. This camouflage increases the effectiveness of the secondary attack and makes it difficult to respond in a timely manner.
- Often, newcomers to the world of cybercrime resort to DDoS attacks for fun or self-affirmation. They may seek to demonstrate their technical abilities and take satisfaction in disrupting the performance of other people’s projects, platforms, or services.
In fact, absolutely any organization or individual, regardless of their field of activity or business scale, may be at risk.
Protecting against DDoS attacks
It is impossible to completely protect against Distributed Denial of Service (DDoS) attacks, but it is essential to significantly reduce their likelihood. To achieve this goal, it is vital to develop a strong, multi-layered security strategy. First, there are specialized services and devices that are specifically designed to help detect and neutralize these types of attacks. They operate effectively at the network level, allowing them to identify and block malicious traffic that could disrupt operations. This includes various monitoring systems, firewalls, and integrated hardware-software solutions such as DefencePro and Impletec iCore.
In addition, using Content Delivery Networks (CDNs) is a wise choice, as it helps distribute traffic across your servers, thereby reducing the load on your infrastructure. In fact, creating a distributed IT ecosystem is a good practice. This means ensuring that key aspects of your project are stored on different IP addresses, increasing flexibility and security against potential threats.
Improving the performance of your IT infrastructure can greatly reduce the risk of a successful DDoS attack. This can include not only the bandwidth of communication channels, but also the careful configuration of network protocols, as well as proper optimization of server performance in order to achieve maximum resource efficiency. By taking a comprehensive approach to these aspects, it is possible to create a more robust and resilient system.
The main element of the functioning of digital services is the Domain Name System (DNS), so all its components require reliable protection. Particular attention should be paid to the security of DNS servers: they must be protected from attacks aimed at replacing addresses, which allow attackers to use actions capable of paralyzing the functioning of services.
In addition, proactive planning is an important element of DDoS protection. Companies are required to develop tactics for responding to such incidents in advance. Such a plan should include a clear algorithm of actions for employees, include contact information for specialists responsible for information security, provide measures to protect ongoing business processes, and record other important protocols necessary for a quick and effective response in the event of an attack.
Conclusion
DDoS attacks are one of the most serious threats to companies whose work depends on the stable operation of online services. These cyberattacks can completely paralyze digital infrastructure, cause long-term downtime, loss of critical information, and irreparable damage to business reputation. In this article, we have described effective protection methods in simple terms that will help minimize possible losses. However, it should be understood that countering such attacks is not a one-time action, but an ongoing process. Attackers do not stand still and are constantly improving their tactics. Therefore, systematic monitoring, regular updates of security systems, and a high degree of preparedness are key elements of a digital environment resistant to DDoS threats and stable business operations.
