What constitutes a cyber threat actor?

A cyber threat actor is defined as individuals or groups whose actions pose a threat to the integrity, availability, or confidentiality of computer systems and networks. This includes various types of aggressors, such as hackers, cybercriminals, and state-sponsored actors, who may engage in activities such as data breaches, malware distribution, and cyber espionage to exploit vulnerabilities for malicious purposes.

The emphasis on posing a threat distinguishes these actors from those involved in cybersecurity protections or tool development. While there are individuals or groups dedicated to enhancing security measures, those do not qualify as threat actors because their intent is not to harm or exploit systems. Similarly, users with access to restricted information are not inherently threatening unless they misuse that access. Thus, the definition of a cyber threat actor is accurately captured by identifying those who actively seek to harm computer systems and networks.