What They Are
Why They Matter,
and How to Stay Protected

Cybersecurity threats include malware, phishing, ransomware, DDoS attacks, insider threats, and zero-day exploits. Each type of attack carries unique risks, from stolen data and identity theft to system downtime and costly recovery. For example, phishing can compromise employee credentials, while ransomware can lock critical business systems until a payment is made. These threats not only impact financial stability but also damage customer trust and brand reputation. Staying aware of evolving risks is the first step toward building a stronger defense.

The five most common cyber threats in 2025 are malware, phishing, ransomware, DDoS attacks, and insider threats. Malware remains a top concern, infecting systems to steal or corrupt data. Phishing continues to trick individuals into handing over passwords or financial details. Ransomware has grown more damaging, targeting businesses of all sizes. DDoS attacks overwhelm websites, causing costly outages. Insider threats—whether accidental or malicious—exploit legitimate access to harm organizations. These threats together make up the majority of today’s cyber incidents.

Many cyberattacks succeed because they exploit human error. Phishing emails, social engineering scams, and business email compromise attacks rely on individuals clicking links, opening infected attachments, or sharing credentials. Attackers know people are often the weakest link in security, so they disguise threats as trusted messages or websites. Even well-trained employees can be fooled when under pressure or distracted. This is why ongoing security awareness training and multi-layered defenses are so important—technology alone isn’t enough to stop these attacks.

Malware is one of the most serious cybersecurity threats because it can infiltrate systems undetected and cause widespread harm. Once inside, malware may steal personal data, corrupt files, spy on user activity, or even grant attackers remote control of a device. Businesses face risks of intellectual property theft, regulatory violations, and expensive recovery costs. For individuals, malware can mean stolen passwords, drained bank accounts, or identity theft. Strong antivirus protection and regular updates are essential for minimizing this risk.

Phishing remains the most common cyberattack worldwide. Billions of phishing emails are sent every day, often disguised as messages from trusted companies or colleagues. These attacks aim to trick people into clicking malicious links or entering personal credentials on fake websites. Because phishing relies on human error, even tech-savvy users can be caught off guard. Businesses often experience phishing as the entry point to larger breaches, including ransomware. Multi-factor authentication and employee training are key to reducing this threat.

Some of the most infamous cyberattacks in recent history include the SolarWinds breach (2020), which impacted U.S. government agencies and major corporations; the Colonial Pipeline ransomware attack (2021), which disrupted fuel supply across the East Coast; the MOVEit file transfer hack (2023), which affected hundreds of organizations; and the MGM Resorts attack (2023), which cost more than $100 million. More recently, the 2024 Kadokawa and 2025 St. Paul ransomware incidents show how threats are growing more global and destructive.

You can reduce your risk by following a few essential best practices. Start with trusted protection like Intego Antivirus, which defends against malware, ransomware, and phishing attacks in real time. Enable multi-factor authentication on important accounts, keep your operating system and apps updated, and avoid clicking suspicious links or downloading unknown attachments. Regular data backups add another layer of safety in case an attack succeeds.

Businesses need a layered security strategy to defend against evolving attacks. This includes enterprise-grade antivirus, firewalls, intrusion detection, and data encryption. Just as important is employee training—phishing and social engineering remain top entry points for attackers. Regular backups ensure critical files can be restored quickly after an incident. Companies must also stay compliant with regulations and conduct regular audits of their systems. Partnering with trusted security providers can give businesses ongoing monitoring and support, reducing risk exposure.

Healthcare, finance, and small to mid-sized businesses are the top three targets for cyberattacks. Healthcare organizations hold sensitive patient data and operate critical systems, making them attractive for ransomware groups. Financial institutions are prime targets due to their access to money and confidential records. Small businesses, meanwhile, often lack the resources for robust defenses, making them easy prey for phishing and malware campaigns. These industries are attacked more frequently because the potential payoff for criminals is so high.

Defending against malware requires multiple layers of protection. Reliable antivirus software should be your first line of defense, blocking threats before they infect your system. Keeping your operating system and applications updated helps prevent attackers from exploiting known vulnerabilities. Safe browsing habits and regular backups are also key to minimizing damage. Adding Intego Firewall strengthens your defenses by monitoring network traffic and blocking suspicious or unauthorized connections before they reach your device.