- What Is a Cyber Attack?
- Why Cyber Attacks Are Increasing
- The Most Common Types of Cyber Attacks
- Real-World Cyber Attack Examples
- Who Are the Targets?
- How to Prevent Cyber Attacks: 10 Essential Steps
- 1. Enforce Multi-Factor Authentication (MFA) Everywhere
- 2. Patch and Vulnerability Management
- 3. Conduct Regular Security Awareness Training
- 4. Deploy Endpoint Detection and Response (EDR)
- 5. Implement Network Segmentation
- 6. Back Up Data — and Test Backups
- 7. Enforce the Principle of Least Privilege
- 8. Secure Email with Advanced Filtering
- 9. Monitor for Threats Continuously
- 10. Run Penetration Tests and Security Assessments
- How Cynet Helps Protect Against Cyber Attacks
What Is a Cyber Attack?
A cyber attack is a deliberate effort by an unauthorized party to breach the confidentiality, integrity, or availability of a computer system, network, or dataset. Such attacks may affect individuals, private companies, public institutions, and critical infrastructure. Their objectives can include financial profit, espionage, operational disruption, or sabotage.
According to IBM’s “Cost of a Data Breach Report”, the average cost of a data breach reached $4.4 million in 2025. As the number of attacks continues to grow each year, organizations must understand what cyber attacks are, how they operate, and which defenses can reduce their impact.
Why Cyber Attacks Are Increasing
The threat environment has grown significantly because several major trends are converging. Artificial intelligence is now intensifying the effect of each of these trends.
The rapid growth of remote work expanded the number of endpoints that organizations need to secure. The shift to cloud infrastructure created new weaknesses related to identity, access, and misconfiguration. The spread of Ransomware-as-a-Service (RaaS) platforms has also made advanced attacks accessible to actors with limited technical expertise.
AI has now become an additional accelerator. Threat actors use generative AI and automation to speed up reconnaissance, create realistic phishing messages, develop polymorphic malware, and expand social engineering operations with far greater speed and personalization. Activities that previously required skilled operators and weeks of preparation can now be completed within hours.
Four structural factors are increasing the overall volume of attacks:
1. Expanded Attack Surface
Every cloud workload, remote endpoint, SaaS application, API, and third-party integration can become an entry point. A typical enterprise now relies on hundreds of cloud services, and many of them operate beyond centralized visibility. AI-enabled discovery tools allow attackers to identify, scan, and prioritize exposed assets continuously and at machine speed.
2. Commoditization of Attack Tools
Exploit kits, phishing-as-a-service offerings, credential stuffing tools, and ready-made malware are sold on dark web marketplaces for relatively low prices. AI reduces the required skill level even further. It supports automated exploit creation, deepfake-based impersonation, and adaptive malware that changes its behavior to avoid detection. As a result, the technical barrier for launching sophisticated campaigns has sharply decreased.
3. AI-Driven Social Engineering at Scale
Generative AI allows attackers to create phishing emails that are grammatically correct, context-aware, and customized for specific industries, executives, or active business conversations. Voice cloning and deepfake video make these attacks appear even more credible. This significantly increases the likelihood of clicks, credential theft, and successful manipulation.
4. The Profitability of Cybercrime
Global cybercrime is expected to cost the world more than $12 trillion annually by 2031. Ransomware alone produces billions of dollars in ransom payments every year, which funds increasingly advanced criminal operations. AI improves the efficiency of threat groups by automating victim prioritization, supporting ransom negotiation strategies, and making cybercrime more scalable and profitable.
The Most Common Types of Cyber Attacks
Understanding the mechanics of different attacks is the first step toward building effective defenses. The following categories are among the most common threats facing organizations today.
1. Malware
What it is: Malware, or malicious software, is a broad term for any program created to damage systems, interrupt operations, or gain unauthorized access. It includes viruses, worms, Trojans, spyware, adware, and keyloggers.
How it works: Malware is commonly delivered through phishing emails, malicious downloads, infected USB devices, or drive-by downloads from compromised websites. After execution, it may steal information, create backdoors, delete or corrupt files, or add the infected device to a botnet.
Why it matters: Malware is frequently delivered through email, which makes it one of the most common entry points for initial compromise. Emotet, one of the most widespread malware families ever tracked, started as a banking trojan. It later evolved into a powerful dropper capable of deploying additional malware families, including ransomware.
How to defend against it: Organizations should deploy endpoint detection and response (EDR), enforce strong email filtering, and keep software updated. Behavioral detection is especially important because signature-based antivirus tools alone cannot reliably detect modern polymorphic malware.
2. Ransomware
What it is: Ransomware is a form of malware that encrypts a victim’s files and demands payment, usually in cryptocurrency, in exchange for a decryption key.
How it works: Most ransomware incidents follow a familiar attack chain. The attacker first obtains access, often through phishing or stolen credentials. The attacker then moves laterally through the network to increase the scope of encryption, steals sensitive data to gain leverage, and finally deploys the ransomware payload.
Modern ransomware groups commonly use double extortion. They encrypt files and also threaten to publish stolen data on a leak site if the ransom is not paid. Some groups have expanded to triple extortion by directly threatening the victim’s customers or partners.
Why it matters: The average cost of a ransomware attack against a business is $5.08 million, according to IBM in 2025. This figure includes downtime, ransom payments, recovery expenses, and reputational harm. Healthcare, manufacturing, and education are affected disproportionately.
Notable examples: Ryuk, Clop, LockBit, BlackCat/ALPHV, REvil.
How to defend against it: Offline and immutable backups remain the most effective technical safeguard. They should be combined with network segmentation to limit lateral movement, privileged access management (PAM), and continuous monitoring.
3. Phishing & Spear-Phishing
What it is: Phishing attacks use fraudulent emails, messages, or websites to trick users into sharing credentials, downloading malware, or transferring money. Spear-phishing is a more targeted form that uses personal or contextual information to appear more convincing.
How it works: A general phishing campaign targets a broad audience with large volumes of emails impersonating banks, shipping companies, or IT departments. Spear-phishing focuses on specific individuals, often executives or finance employees. It uses details collected from LinkedIn, social media, or previous data breaches.
Why it matters: Phishing remains the leading initial access vector. The FBI’s Internet Crime Complaint Center (IC3) regularly lists phishing as the most reported cybercrime in the United States. Business Email Compromise (BEC), which is a subcategory of phishing, causes billions of dollars in organizational losses every year.
How to defend against it: Multi-factor authentication reduces the impact of stolen credentials. Email security gateways with URL rewriting and sandboxing can detect malicious links. Security awareness training has been shown to reduce click rates in simulated phishing exercises.
4. Supply Chain Attacks
What it is: A supply chain attack compromises a victim by targeting a trusted third-party vendor, software update process, or open-source dependency instead of attacking the victim directly.
How it works: Attackers compromise a software provider or managed service provider, insert malicious code into a legitimate product or update, and then use the trusted relationship to reach downstream customers at scale.
Why it matters: Supply chain attacks are difficult to detect because they abuse existing trust. A single vendor compromise can affect thousands of organizations at the same time, greatly increasing both the impact and the return on investment for the attacker.
Notable example: The SolarWinds SUNBURST attack in 2020 remains one of the most significant supply chain attacks ever recorded. Attackers compromised SolarWinds’ build pipeline and distributed a trojanized update for the Orion platform to roughly 18,000 organizations, including US federal agencies. The backdoor communicated with attacker-controlled command-and-control servers and stayed undetected for months.
How to defend against it: Organizations should adopt a zero-trust architecture that does not automatically trust software from vendors. They should also monitor trusted processes for unusual behavior and implement software bill of materials (SBOM) practices to track third-party dependencies.
5. Distributed Denial-of-Service (DDoS) Attacks
What it is: A DDoS attack sends large volumes of traffic from multiple sources to a server, network, or service. The goal is to exhaust capacity and make the target unavailable to legitimate users.
How it works: Attackers usually use a botnet, which is a network of compromised devices, to generate high traffic volumes. DDoS techniques include volumetric attacks that consume bandwidth, protocol attacks such as TCP/SYN floods, and application-layer attacks such as HTTP floods aimed at specific functions.
Why it matters: DDoS attacks can disable e-commerce platforms, financial services, DNS infrastructure, and critical services for hours or even days. In addition to direct revenue loss, they are increasingly used as a diversion while attackers carry out a second, more targeted intrusion.
How to defend against it: DDoS mitigation providers such as Cloudflare and Akamai offer always-on traffic scrubbing. On-premises defenses include rate limiting, traffic shaping, and IP reputation filtering. Incident response plans should also treat DDoS as a possible smokescreen for another attack.
6. Man-in-the-Middle (MitM) Attacks
What it is: In a man-in-the-middle attack, an attacker secretly intercepts and may alter communication between two parties who believe they are communicating directly.
How it works: Common methods include ARP spoofing, which poisons a local network’s address resolution table; DNS spoofing, which redirects domain lookups; SSL stripping, which downgrades HTTPS to HTTP; and rogue Wi-Fi access points in public locations.
Why it matters: MitM attacks can capture session tokens, credentials, and sensitive data while the victim remains unaware. Telecom-level SS7 attacks are a more advanced variant. In these attacks, adversaries exploit weaknesses in legacy signaling protocols to intercept SMS-based two-factor authentication codes.
How to defend against it: HTTPS should be enforced everywhere with HSTS. Mobile applications should use certificate pinning. Remote workers should use VPNs. SMS-based MFA should be replaced with authenticator applications or hardware security keys.
7. SQL Injection (SQLi)
What it is: SQL injection is a code injection attack in which malicious SQL queries are inserted into an input field to manipulate a backend database.
How it works: If an application sends user input directly into a database query without proper validation, an attacker can alter the query logic. This may expose all database records, bypass authentication, modify or delete data, and in some cases execute operating system commands.
Why it matters: SQL injection has appeared in the OWASP Top 10 for more than 15 years. Although the technique is well understood, it remains one of the most common causes of data breaches. It requires no specialized tools, only a browser and knowledge of the method.
How to defend against it: Applications should use parameterized queries and prepared statements. Database accounts should follow the principle of least privilege. A web application firewall can also serve as an additional defensive layer.
8. Zero-Day Exploits
What it is: A zero-day exploit targets a software or hardware vulnerability that is unknown to the vendor. This means there are zero days of advance notice and no patch is available.
How it works: Threat actors may discover vulnerabilities through research, buy them from exploit markets, or obtain them through intelligence operations. Nation-state groups often keep reserves of undisclosed zero-days for targeted espionage operations.
Why it matters: Zero-days are especially dangerous because patch-based defenses cannot stop them before a fix exists. High-value zero-days can be sold for millions of dollars on both legal government markets and illegal marketplaces.
How to defend against it: Defense-in-depth is the only practical strategy. Organizations should assume that any software may be compromised and apply layered controls such as network segmentation, application allowlisting, behavioral analytics, and rapid response capabilities.
9. Identity & Credential-Based Attacks
What it is: These attacks target credentials and identity systems to gain authenticated access without exploiting a technical vulnerability. In this scenario, the attacker simply logs in.
How it works: Common techniques include credential stuffing, where breached username and password pairs are reused against other services; password spraying, where common passwords are tested across many accounts; brute force attacks; and Pass-the-Hash or Pass-the-Ticket attacks that abuse Windows authentication protocols.
Why it matters: Credentials are among the most widely traded assets on the dark web. Since billions of username and password combinations have already been exposed in earlier breaches, credential stuffing can succeed at scale with limited effort. Identity-based attacks are also difficult to detect because they often look like legitimate authentication activity.
How to defend against it: MFA should be enforced across all accounts. Organizations should implement Identity Threat Detection and Response capabilities. They should monitor impossible travel, off-hours logins, and unusual access patterns. Privileged credentials should be audited and rotated regularly.
10. Social Engineering
What it is: Social engineering targets people rather than systems. It exploits psychological triggers such as authority, urgency, fear, and reciprocity to manipulate individuals into harmful actions.
How it works: Techniques include pretexting, where a fabricated scenario is used to extract information; vishing, or voice phishing; smishing, or SMS phishing; baiting, such as leaving infected USB drives in public places; and quid pro quo attacks, where something valuable is offered in exchange for credentials or access.
Why it matters: The human element remains one of the weakest points in most security programs. Even highly technical attacks often begin with social engineering to obtain initial access. AI-generated deepfakes are making voice and video-based manipulation increasingly believable.
How to defend against it: Regular security awareness training, simulated phishing and vishing exercises, and a strong reporting culture are the main defenses. Technical controls such as MFA and out-of-band verification for sensitive requests reduce the damage when social engineering succeeds.
Real-World Cyber Attack Examples
High-profile incidents show how different attack methods are combined in real environments. They also show which lessons defenders can take from actual breaches.
MGM Resorts (2023) — Social Engineering + Ransomware
The MGM Resorts breach is one of the clearest examples of how a single phone call can disrupt a $33 billion company. The incident did not begin with malware or a zero-day exploit. It began with a ten-minute conversation.
In September 2023, the threat group Scattered Spider, also known as UNC3944, identified an MGM employee on LinkedIn. The group then called MGM’s IT help desk while impersonating that employee and persuaded support staff to reset the account credentials. That vishing call gave the attackers administrator-level access to MGM’s Okta and Azure Active Directory environments. They later deployed BlackCat/ALPHV ransomware across more than 100 ESXi hypervisors inside the network.
The operational impact was immediate and highly visible. Slot machines at Las Vegas properties displayed error messages. Digital room keys stopped functioning. ATMs became unavailable. Online reservations and the MGM mobile application could not be accessed. At some properties, staff had to use handwritten receipts for casino winnings. The disruption lasted around ten days and caused an estimated $100 million impact on MGM’s third-quarter results. This included approximately $84 million in lost revenue and $10 million in one-time remediation costs.
The breach also exposed personal information belonging to customers who had transacted with MGM before March 2019. The affected data included names, contact information, gender, dates of birth, driver’s license numbers, and, for a limited number of people, Social Security numbers and passport details.
MGM did not pay the ransom. Caesars Entertainment, which was attacked by the same group during the same week, reportedly paid about $15 million to stop stolen data from being published.
By 2025, MGM had launched a class-action settlement program covering this breach and a previous 2019 incident. US prosecutors had also unsealed criminal charges against five alleged members of Scattered Spider.
Key lesson:
Social engineering can bypass technical controls. A help desk employee without sufficient security awareness can give an attacker access to critical enterprise systems. Identity verification procedures for sensitive account changes, including out-of-band confirmation, must be mandatory. MFA on identity platforms such as Okta must be hardened against social engineering, not only against credential stuffing.
Covenant Health (2025) — Healthcare Ransomware
The Covenant Health breach shows how ransomware attacks against healthcare providers typically unfold. It also shows how initial breach notifications can significantly understate the real impact on patients.
On May 18, 2025, attackers linked to the Qilin ransomware group gained unauthorized access to the IT environment of Covenant Health. Covenant Health is a Catholic healthcare network operating hospitals and clinics across Massachusetts, Maine, New Hampshire, Pennsylvania, Rhode Island, and Vermont. The intrusion remained undetected for eight days. During that period, the attackers performed reconnaissance, moved laterally through the network, escalated privileges, and exfiltrated about 852 GB of data, equal to roughly 1.35 million files. They then deployed ransomware to encrypt systems and disrupt operations at several facilities, including St. Joseph Hospital and St. Mary’s Health System in Maine.
Covenant Health first reported the breach to regulators in July 2025 and stated that approximately 7,900 people were affected. By December 31, 2025, after completing its forensic investigation, the organization revised that number to 478,188 patients. This represented an increase of nearly 6,000% compared with the original disclosure.
The exposed information included names, addresses, dates of birth, medical record numbers, Social Security numbers, health insurance information, and treatment details. These treatment details included diagnoses, dates of service, and types of care received. After Covenant refused to pay the ransom, Qilin published the stolen data on its dark web leak site.
Key lesson:
Healthcare organizations are frequent targets because patient data is highly valuable and operational disruption creates strong pressure to pay. The Covenant Health incident also highlights a broader problem with breach notification timelines. Nearly six months passed between the initial disclosure and confirmation of the true scope, leaving hundreds of thousands of patients without timely notice. Organizations need stronger forensic capabilities and incident response processes to determine the accurate scope of a breach faster.
Salesloft / Drift / Salesforce (2025) — SaaS Supply Chain Attack
The Salesloft Drift breach in August 2025 is one of the most significant SaaS supply chain attacks documented. It affected hundreds of organizations at the same time, including Cloudflare, Google, Palo Alto Networks, Zscaler, HackerOne, and Workday, through one compromised third-party integration.
The attack was attributed to the threat actor UNC6395 and began months before the public disclosure. Between March and June 2025, the attackers compromised Salesloft’s GitHub environment. They gained a foothold in Drift’s infrastructure, which belonged to an AI chat agent that Salesloft had acquired in 2024. They then stole the OAuth tokens that Drift used to connect to customer Salesforce CRM instances. OAuth tokens are long-lived authentication credentials that allow one application to act on behalf of another without a username or password. Crucially, these tokens are not protected by MFA.
Between August 8 and August 18, 2025, UNC6395 used the stolen tokens to impersonate the trusted Drift application. The group then ran bulk data export queries across the Salesforce environments of more than 700 organizations. The attacker queried Salesforce objects such as Accounts, Contacts, Cases, Users, and Opportunities. This allowed the exfiltration of large volumes of business information, support case content, and sales records. After the data was stolen, the group searched it for embedded secrets, including AWS access keys, Snowflake tokens, VPN credentials, and API keys. These secrets could be used to pivot into victim environments and expand the attack.
On August 20, Salesforce revoked all Drift OAuth tokens and removed the Drift application from AppExchange. A forensic investigation by Mandiant confirmed that the breach was limited to the Drift application environment. It also confirmed that the core Salesloft platform had not been compromised for data exfiltration.
Key lesson:
This attack did not exploit a vulnerability in Salesforce itself. It exploited trust. By impersonating a legitimate and widely used integration, the attacker’s activity blended into normal API traffic and bypassed conventional security controls. The breach shows that OAuth tokens must be treated as high-value credentials. Third-party SaaS integrations need continuous monitoring and regular access reviews. The implicit trust granted to connected applications is a major and often underestimated attack surface. In a SaaS-first environment, identity has become the new perimeter, and every integration can become an entry point.
Who Are the Targets?
No organization is fully immune to cyber attacks. However, some sectors and organization types are targeted more often than others.
Healthcare remains a consistent top target because health records are valuable on criminal markets and often sell for higher prices than financial data. The need for continuous uptime also gives ransomware groups additional leverage. Many healthcare organizations have historically operated with underfunded security programs.
Financial services attract attackers motivated by direct financial gain. These attackers seek access to funds, payment systems, and sensitive financial infrastructure. Regulatory complexity can also create compliance-related attack surfaces.
Critical infrastructure, including energy, water, transportation, government, and manufacturing, is targeted by nation-state actors seeking geopolitical leverage. It is also targeted by ransomware groups that exploit operational technology environments.
Small and midsize businesses are often targeted because attackers view them as easier victims. They can also become stepping stones to larger organizations through supply chain relationships.
Government and defense organizations are targeted for espionage, intelligence gathering, and strategic disruption.
How to Prevent Cyber Attacks: 10 Essential Steps
Research consistently shows that 80% of data breaches can be prevented through foundational security practices. The following controls deliver the highest return on investment for most organizations.
1. Enforce Multi-Factor Authentication (MFA) Everywhere
MFA is the highest-impact single control for reducing credential-based attacks. It should be enabled on all accounts, especially remote access, VPN, email, and privileged administrative accounts. Authenticator applications or hardware security keys are preferable to SMS-based codes.
2. Patch and Vulnerability Management
Most successful attacks exploit known vulnerabilities rather than zero-days. Organizations should maintain a process for applying critical and high-severity patches within 24 to 72 hours after release. Vulnerability scanning tools should be used to maintain continuous visibility into exposure.
3. Conduct Regular Security Awareness Training
Employees should be trained to identify phishing, social engineering, and other techniques that target human behavior. Simulated phishing campaigns should support training by measuring and improving practical awareness. Security culture should be treated as a measurable security control.
4. Deploy Endpoint Detection and Response (EDR)
Traditional antivirus detects only known threats. EDR platforms use behavioral analysis to identify suspicious activity, including activity from unknown malware. A platform with automated response capabilities can contain threats before they spread.
5. Implement Network Segmentation
A network should be divided into zones with controlled access between them. This limits lateral movement after an initial compromise. An attacker who compromises a workstation should not automatically gain access to servers, backup systems, or operational technology environments.
6. Back Up Data — and Test Backups
Organizations should follow the 3-2-1 backup rule: three copies of data, stored on two different media types, with one copy kept offsite or immutable through air-gapped or append-only cloud storage. Restoration must be tested regularly because untested backups cannot be considered reliable backups.
7. Enforce the Principle of Least Privilege
Users and service accounts should have access only to the resources required for their roles. Permissions should be reviewed and reduced regularly. Privileged Access Management solutions can automate this process at scale and provide session monitoring for high-risk accounts.
8. Secure Email with Advanced Filtering
An email security gateway should include URL sandboxing, attachment analysis, and impersonation protection. DMARC, DKIM, and SPF should be configured to prevent domain spoofing in external phishing campaigns.
9. Monitor for Threats Continuously
Real-time visibility across the environment is essential. This may be achieved through a Security Information and Event Management platform, a Managed Detection and Response service, or an integrated XDR platform. Organizations need the ability to detect threats before they escalate.
10. Run Penetration Tests and Security Assessments
Periodic third-party penetration testing helps identify exploitable vulnerabilities before attackers discover them. Red team exercises should also be used to test detection and response capabilities, not only preventive controls.
How Cynet Helps Protect Against Cyber Attacks
Cynet’s unified XDR platform brings together the essential capabilities organizations need to prevent, detect, and respond to cyber attacks. It reduces the complexity of managing a fragmented security stack.
Endpoint Security (EDR/NGAV): Stops known and unknown malware through AI-driven behavioral analysis. It helps prevent ransomware, fileless attacks, and zero-day exploits at the endpoint level.
Network Security: Provides network traffic analysis and anomaly detection to identify lateral movement, data exfiltration, and command-and-control communication in real time.
Identity Security (ITDR): Detects credential theft, account takeover, and privilege escalation by monitoring authentication behavior and identifying anomalies associated with identity-based attacks.
SaaS & Cloud Security (SSPM/CSPM): Identifies misconfigurations, excessive permissions, and risky activity across cloud workloads and SaaS applications before attackers exploit them.
24/7 MDR (CyOps): Cynet’s security analyst team monitors environments around the clock, triages alerts, hunts for threats, and responds to incidents. This extends internal security capabilities without requiring additional headcount.
Automated Response: Pre-built and customizable response playbooks contain threats automatically. They can isolate infected endpoints, block malicious IP addresses, and reduce the time attackers have to operate inside an environment.
