With cybersecurity, an actor, malicious actor, or threat actor is anyone capable of affecting your computer or network security.

Types of threat actors

When describing a threat actor, they’ll fall into one of the following four categories.

Cybercriminal

A cybercriminal is an individual or group who participates in a computer crime against a person or company for financial reasons. For example, a cybercriminal may attack a company, infect its software with ransomware, and hold their data hostage until a certain sum is paid.

Insider

An insider threat is a person employed by a company or who was employed by a company that they attack. For example, an insider may steal and distribute company-sensitive information to a competitor, which could include security-related information.

Hacktivist

A hacktivist participating in hacktivism is another type of threat actor. For example, a hacktivist may not agree with your political views and perform a DoS attack against your home or work computer.

An insider isn’t specific to only a company. If you share your computer, smartphone, or other devices with a spouse, child, or anyone else, they can also intentionally or unintentionally be an insider threat.

Nation-state

A nation-state is a country that targets its own or other nations’ citizens or institutions to spy on them, steal data, or damage the economy. For example, a nation-state may install malware on a journalist’s smartphone to spy on them or find out about informants.

Black hat, Computer crime, Hacker, Security terms, Threat

  • How to protect yourself while on the Internet.
  • How to hack someone or something.
  • How to become a hacker.
  • How to know if a computer was hacked.
  • What should I do if I’ve been hacked?
  • Listing of computer hackers.
  • Computer security help and support.