A cybercriminal is an individual or group that uses computers, networks, or the internet to commit illegal activities. These crimes can include stealing sensitive data, spreading malware, conducting online fraud, or extorting money from individuals and organizations. Cybercriminals often exploit security vulnerabilities to gain unauthorized access to systems, disrupt services, or steal financial and personal information. Their actions can target anyone from individuals to large corporations, causing financial loss, reputational damage, and privacy breaches.