What is a Cyberattack?

Cyberattacks are no longer just a concern for large corporations or government institutions. Every day, businesses of all sizes and even individual users face the risk of malicious actors trying to steal data, disrupt services, or compromise sensitive information. Understanding what a cyberattack is — and how to defend against it — has become essential knowledge. Whether you're an entrepreneur, an IT professional, or simply someone who values their online privacy, this guide will equip you with the tools to stay one step ahead of digital threats.

What is a Cyber attack?

A cyberattack refers to any deliberate attempt to steal, expose, modify, disable, or destroy data, applications, or other assets by gaining unauthorized access to a network, computer system, or digital device.

Threat actors carry out cyberattacks for various reasons — from minor theft to large-scale acts of aggression. To achieve their goals, they employ tactics such as malware attacks, social engineering scams, and password theft to infiltrate their target systems.

The impact of cyberattacks can be devastating, with businesses facing serious financial and operational consequences. On average, a data breach costs approximately USD 4.88 million. This figure covers expenses like investigating the breach, responding to the incident, downtime, lost revenue, and potential long-term damage to the organization's reputation and brand.

However, some cyberattacks can be even more catastrophic. For instance, ransomware attacks have demanded ransom payments as high as USD 40 million, while Business Email Compromise (BEC) scams have stolen up to USD 47 million from victims in a single strike. Additionally, cyberattacks that expose customers' personally identifiable information (PII) can lead to severe consequences such as customer trust erosion, regulatory penalties, and even legal repercussions.

Why Do Cyberattacks Happen?

Cyberattacks can occur for various reasons, but they generally fall into three primary categories: criminal, political, and personal motivations.

1. Criminal Motivations

Attackers driven by criminal motives are typically seeking financial gain. They may:

1. Steal money directly by hacking into bank accounts.
2. Use social engineering tactics to deceive individuals into transferring funds.
3. Steal sensitive data for identity theft or sell it on the dark web.
4. Hold data or systems hostage through ransomware or DDoS attacks, demanding payment for restoration.

Surprisingly, recent reports indicate that 32% of cyber incidents involve the theft and resale of data, rather than encrypting it for ransom.

2. Personal Motivations

Some cyberattacks are personal in nature, often carried out by disgruntled current or former employees seeking revenge. These individuals may:

1. Steal confidential information.
2. Cause system disruptions.
3. Attempt to damage the company's reputation or finances.

3. Political Motivations

Politically driven attackers are often linked to cyberwarfare, cyberterrorism, or hacktivism. In these cases:

1. Nation-state actors may target rival governments or critical infrastructure. For instance, since the onset of the Russia-Ukraine War, both nations have seen a significant increase in cyberattacks targeting vital institutions.
   
   
2. Hacktivists aim to make a political or social statement. While their attacks may cause minimal damage, their primary goal is to draw public attention to their cause.

Other Motivations

While less common, cyberattacks may also occur due to:

1. Corporate espionage, where hackers steal trade secrets or intellectual property to give competitors an advantage.
   
   
2. Vigilante hacking, where individuals exploit system vulnerabilities to expose security flaws and warn organizations.
   
   
3. Hacking for sport, where attackers are motivated purely by the intellectual challenge of breaching systems.

Regardless of their motivation, cyberattacks pose a serious threat to businesses and individuals alike, emphasizing the importance of proactive cybersecurity measures.

Who is Behind Cyberattacks?

Cyberattacks can be initiated by various groups, including criminal organizations, state actors, and individuals. Threat actors are typically classified into two categories: outsider threats and insider threats.

Outsider Threats

Outsider threats are individuals or groups who have no authorized access to a network or device but manage to infiltrate it through malicious tactics. Common types of external cyberthreat actors include:

1. Organized criminal groups seeking financial gain.
   
   
2. Professional hackers hired to exploit system vulnerabilities.
   
   
3. State-sponsored actors conducting cyber espionage or sabotage.
   
   
4. Amateur hackers experimenting or attacking for sport.
   
   
5. Hacktivists aiming to promote a social or political cause.

Insider Threats

Insider threats come from users who have authorized access to a company's systems but misuse their privileges — either intentionally or accidentally. This group may include:

1. Employees with malicious intent.
   
   
2. Business partners, clients, or contractors who have system access.
   
   
3. Suppliers who may inadvertently compromise security.

While negligent users can expose their companies to risks, a true cyberattack occurs only when someone intentionally abuses their access. For example:

1. An employee who mistakenly stores sensitive information in an unsecured folder is not committing a cyberattack.
   
   
2. Conversely, a disgruntled employee who deliberately copies and distributes confidential data for personal gain is engaging in malicious activity.

Both insider and outsider threats pose serious risks, underscoring the need for robust security measures and employee awareness programs.

Read more: What is Security Operations Center (SOC)?

What Do Cyberattacks Target?

Cybercriminals often infiltrate computer networks with a clear objective in mind. Common targets include:

1. Financial assets such as direct monetary theft or payment data.
   
   
2. Business financial records that reveal sensitive company information.
   
   
3. Client lists that provide valuable contact information.
   
   
4. Customer data, including personally identifiable information (PII) and other sensitive personal details.
   
   
5. Email addresses and login credentials for account hijacking or phishing schemes.
   
   
6. Intellectual property, such as trade secrets, proprietary designs, or innovative product concepts.

However, not all cyberattacks are about theft. In some cases, attackers aim to disrupt information systems or IT infrastructure to damage businesses, government institutions, or other targeted organizations, causing operational chaos without stealing any data.

What Impact Do Cyberattacks Have on Businesses?

When successful, cyberattacks can inflict severe damage on businesses, resulting in downtime, data loss, and financial setbacks. The consequences often extend far beyond the initial breach. For example:

1. System and Server Crashes: Attackers may deploy malware or initiate denial of service attacks to overwhelm servers, causing major disruptions. These interruptions can significantly impact operations and revenue. On average, data breaches result in USD 2.8 million in lost business.
   
   
2. SQL Injection Attacks: This technique allows cybercriminals to alter, delete, or extract valuable data from compromised systems.
   
   
3. Phishing Attacks: Through deceptive emails or messages, hackers trick individuals into transferring funds or revealing sensitive information, such as login credentials or credit card details.
   
   
4. Ransomware Attacks: Cybercriminals may encrypt company data or lock entire systems, demanding a ransom for restoration. Reports indicate that the average ransom payment is approximately USD 812,360.

Secondary Costs and Consequences

Beyond the immediate damage, organizations often face additional costs related to detecting, responding to, and recovering from breaches. Companies that implement AI-driven security and automation tools have reported significant savings — reducing the average breach cost by approximately USD 2.22 million compared to those without these technologies.

Wider Impact Beyond the Target

In some cases, the repercussions of a cyberattack extend far beyond the initial victim.

For instance, in 2021, the DarkSide ransomware gang attacked the Colonial Pipeline, the largest refined oil pipeline system in the United States. Exploiting a compromised password, the attackers infiltrated the network and shut down the pipeline, which supplies 45% of the gasoline, diesel, and jet fuel to the U.S. East Coast. This incident triggered widespread fuel shortages, illustrating how a targeted cyberattack can escalate into a national crisis.

The attackers demanded nearly USD 5 million in Bitcoin as ransom, which Colonial Pipeline paid. Fortunately, with assistance from the U.S. government, the company was able to recover approximately USD 2.3 million of the ransom amount.

This example underscores the far-reaching impact of cyberattacks and highlights the importance of robust security measures to mitigate risks.

Common Types of Cyberattacks

Cybercriminals use a wide range of sophisticated tools and techniques to launch attacks against enterprise IT systems, personal computers, and other targets. Some of the most common types of cyberattacks include:

Malware

Malware is malicious software designed to render infected systems inoperable. It can destroy data, steal information, or even delete critical files required for system functionality. Malware comes in various forms, including:

1. Trojans: These disguise themselves as useful programs or hide within legitimate software to trick users into installing them. A Remote Access Trojan (RAT) creates a secret backdoor on the victim’s device, while a dropper Trojan installs additional malware after gaining a foothold.
   
   
2. Ransomware: This sophisticated malware uses strong encryption to hold data or systems hostage. Cybercriminals then demand payment to restore access.
   
   
3. Scareware: Uses fake warnings or alerts to scare victims into downloading malware or sharing sensitive information.
   
   
4. Spyware: This malware secretly gathers sensitive data such as usernames, passwords, and credit card numbers, then sends it back to the attacker.
   
   
5. Rootkits: Malware packages that allow hackers to gain administrator-level access to a system’s operating system.
   
   
6. Worms: Self-replicating malicious code that automatically spreads between applications and devices.

Social Engineering

Social engineering attacks manipulate people into performing harmful actions, such as sharing sensitive information, downloading malware, or transferring money to criminals.

1. Phishing: One of the most widespread social engineering attacks. It involves fake emails or text messages designed to steal login credentials, extract sensitive data, or spread malware.
   
   
2. Spear Phishing: A highly targeted attack aimed at specific individuals, often using details from the victim's social media profiles to enhance credibility.
   
   
3. Whale Phishing: A specialized form of spear phishing that targets high-level executives.
   
   
4. Business Email Compromise (BEC): Attackers pose as executives, vendors, or business partners to deceive victims into transferring funds or revealing confidential data.

Denial-of-Service (DoS) and Distributed Denial-of-Service (DDoS) Attacks

These attacks overwhelm a system's resources by flooding it with fraudulent traffic, preventing legitimate requests from being processed and reducing system performance.

1. A DoS attack originates from a single source.
   
   
2. A DDoS attack leverages multiple compromised devices (botnets) to generate the attack traffic.

Botnets often include compromised laptops, smartphones, and Internet of Things (IoT) devices, which may be hijacked without the owner's knowledge.

Account Compromise

This occurs when cybercriminals gain unauthorized access to legitimate user accounts for malicious purposes.

1. Attackers may steal credentials through phishing or purchase stolen password databases on the dark web.
   
   
2. Tools like Hashcat and John the Ripper are commonly used to crack encrypted passwords.
   
   
3. Brute force attacks involve automated scripts that repeatedly attempt different password combinations until one is successful.

Man-in-the-Middle (MitM) Attacks

Also known as eavesdropping attacks, these involve intercepting communications between two parties without their knowledge.

MitM attacks are often conducted on unsecured public Wi-Fi networks, making it easy for attackers to spy on user traffic.

1. In a session hijacking attack, the hacker interrupts the connection between a user and a server, replacing their IP address with the victim’s. This allows the attacker to steal data or manipulate the system.

Supply Chain Attacks

In these attacks, hackers compromise a company by targeting its software vendors, suppliers, or service providers.

Because vendors are often connected to their clients' networks, cybercriminals exploit these connections to infiltrate multiple organizations simultaneously.

For example, in 2020, the software provider SolarWinds was hacked, and malicious actors distributed malware disguised as a software update. This breach compromised the sensitive data of several U.S. government agencies, including the Departments of Treasury, Justice, and State.

Other Types of Cyberattacks

1. Cross-site scripting (XSS): XSS attacks inject malicious code into legitimate web pages or web applications. When users visit the infected site or app, the code executes in their browsers, often stealing sensitive data or redirecting them to fraudulent websites.
   
   
2. SQL Injection: In SQL injection attacks, hackers insert malicious SQL commands through input fields like search bars or login windows. These commands access the website’s database, potentially exposing credit card numbers, personal data, or company information.
   
   
3. DNS Tunneling: This technique conceals malicious traffic within DNS packets, allowing it to bypass firewalls and other security measures. DNS tunneling is often used to create covert communication channels between malware and its command-and-control (C&C) server.
   
   
4. Zero-day Exploits: A zero-day vulnerability takes advantage of security vulnerabilities that are either unknown to the security community or unpatched by developers. These flaws can go undetected for months or years, making them prime targets for cybercriminals.
   
   
5. Fileless Attacks: Fileless attacks exploit vulnerabilities in legitimate software rather than relying on traditional executable files. Attackers often use tools like PowerShell (built into Microsoft Windows) to inject malicious scripts directly into system memory.
   
   
6. DNS Spoofing: Also known as DNS poisoning, this attack manipulates DNS records to redirect users to fraudulent websites designed to steal data or install malware. Victims believe they are visiting a legitimate website, unaware that they’ve been diverted to a harmful clone.

How to prevent Cyberattacks?

Organizations can minimize the risk of cyberattacks by implementing comprehensive cybersecurity systems and strategies. Cybersecurity refers to the practice of protecting critical systems and sensitive information from digital threats using a combination of technology, people, and processes.

Preventing Cyberattacks

Many organizations adopt a threat management strategy to identify and protect their most valuable assets and resources. Key strategies may include:

1. Identity and Access Management (IAM): Implementing IAM platforms and policies, such as least-privilege access, multi-factor authentication (MFA), and strong password policies, helps ensure that only authorized individuals can access sensitive resources. Additionally, companies may require remote employees to use Virtual Private Networks (VPNs) when connecting to unsecured Wi-Fi networks.
   
   
2. Data Security Platforms and Data Loss Prevention (DLP): These tools can encrypt sensitive data, monitor access and usage, and generate alerts when suspicious activity occurs. Regular data backups are also essential to minimize potential damage in case of a breach.
   
   
3. Firewalls: Firewalls act as a barrier between internal networks and external threats, preventing malicious actors from gaining unauthorized access. They can also block outgoing malicious traffic, such as malware attempting to connect to a command and control (C&C) server.
   
   
4. Security Awareness Training: Educating employees about cybersecurity threats helps them recognize and avoid common attack vectors like phishing and other social engineering scams.
   
   
5. Vulnerability Management Policies: Implementing regular patch management schedules and conducting frequent penetration testing helps identify and fix system vulnerabilities before attackers can exploit them.
   
   
6. Attack Surface Management (ASM): ASM tools can identify, categorize, and address potentially vulnerable assets before cybercriminals can exploit them.
   
   
7. Unified Endpoint Management (UEM): UEM tools enforce security policies and controls across all endpoints within the corporate network, including laptops, desktops, and mobile devices.

Read more: What is Attack Surface Management?

Detecting Cyberattacks

While complete prevention is impossible, organizations can implement continuous security monitoring and early detection systems to identify and mitigate cyberattacks in progress. Effective detection tools include:

1. Security Information and Event Management (SIEM): SIEM systems centralize alerts from multiple cybersecurity tools, including intrusion detection systems (IDSs), endpoint detection and response (EDR) solutions, and other security platforms.
   
   
2. Threat Intelligence Platforms: These platforms provide enriched security alerts, offering insights that help security teams better understand potential threats and respond effectively.
   
   
3. Antivirus Software: Regular antivirus scans detect and remove malicious programs, preventing further system compromise.
   
   
4. Proactive Threat Hunting: This approach actively searches for cyberthreats that may be operating secretly within the network, such as advanced persistent threats (APTs).

Responding to Cyberattacks

Organizations must also prepare to respond effectively to ongoing cyberattacks and other cybersecurity incidents. Key response strategies include:

1. Incident Response Plans: These structured plans outline procedures to contain and eliminate cyberattacks, restore compromised systems, and analyze the root cause to prevent future incidents. Organizations with formal incident response plans experience significantly lower breach costs — up to 58% less on average, according to industry research.
   
   
2. Security Orchestration, Automation, and Response (SOAR): SOAR solutions enable security teams to coordinate multiple security tools through automated or semi-automated playbooks that help mitigate cyberattacks in real-time.
   
   
3. Extended Detection and Response (XDR): XDR solutions integrate security tools across all layers — including users, endpoints, email, applications, networks, cloud workloads, and data. These solutions automate complex prevention, detection, investigation, and response processes, including proactive threat hunting.

By combining prevention, detection, and response strategies, organizations can effectively reduce their risk exposure and better defend against evolving cyberthreats.

Read more: What is XDR? The Ultimate Guide to Extended Detection and Response

Protect Your Business Today

Cyberattacks are evolving rapidly, and staying protected requires vigilance, knowledge, and robust security strategies. If you're unsure about your organization’s current cybersecurity defenses, contact us for expert guidance. We specialize in helping businesses strengthen their security posture and minimize risks. Have you ever experienced a cyberattack? What steps did you take?