Cyberattack
From Encyclopedia of Cybersecurity
Cyberattack
A Cyberattack is a deliberate, malicious attempt to disrupt, damage, or gain unauthorized access to computer systems, networks, or digital devices, often with the intent to steal sensitive information, cause financial harm, or disrupt normal operations.
Overview
Cyberattacks exploit vulnerabilities in software, hardware, or human behavior to compromise the confidentiality, integrity, or availability of digital assets, data, and services. They can take various forms, including malware infections, phishing scams, denial-of-service (DoS) attacks, ransomware incidents, and social engineering tactics, and they can target individuals, organizations, governments, or critical infrastructure sectors.
Types
Common types of cyberattacks include:
- Malware Attacks: Deploying malicious software, such as viruses, worms, Trojans, ransomware, or spyware, to infect computers, steal data, disrupt operations, or gain unauthorized access to systems.
- Phishing and Social Engineering: Using deceptive emails, messages, or phone calls to trick users into revealing sensitive information, credentials, or financial data, or to manipulate them into performing actions that benefit attackers.
- Denial-of-Service (DoS) Attacks: Overwhelming target systems, networks, or services with excessive traffic, requests, or malicious packets to disrupt availability, degrade performance, or cause service outages.
- Ransomware Attacks: Encrypting files or locking users out of their systems or data and demanding ransom payments in exchange for decryption keys or restoring access to affected resources.
- Insider Threats: Exploiting insider privileges, access credentials, or trusted positions to steal data, sabotage systems, or conduct unauthorized activities from within an organization.
- Supply Chain Attacks: Compromising software supply chains, third-party vendors, or trusted partners to inject malware, tamper with software updates, or exploit trust relationships to infiltrate target organizations.
- Zero-Day Exploits: Leveraging previously unknown vulnerabilities or software flaws (zero-days) to launch targeted attacks, bypass security control