Dictionary

threat actor en · NOUN

Etymology

Likely US Government jargon, derived from actor (“one that takes part in an action”). First attested in 2000.

Meanings

1. (qualifier:computer security) A person or entity that conducts malicious activities against digital targets, particularly cyberattacks.
   • As noted above, multiple threat actor groups are actively working to expand and improve the DDoS attack capabilities of Mirai-variant botnets. 2016 October 26, Roland Dobbins, Steinthor Bjarnason, “Mirai IoT Botnet Description and DDoS Attack Mitigation”, in NETSCOUT, archived from the original on 01 Mar 2019:
   • Threat actors have repeatedly attempted to breach our systems, without success.
   • The compromised dataset appeared on a notorious hacking forum earlier this week, posted by a threat actor operating under the alias "Solonik." 2026 January 10, Anu Priya, “17.5 Million Instagram Accounts Exposed in Major Data Leak”, in Cyber Press, archived from the original on 10 Jan 2026:
   • A pure threat actor is less complex in capabilities and intent than a mixed type. The most complex actor would possess “the highest and most encompassing” capabilities and intent and compromise a threat kingdom of potential strategies. 2000 August 14, Bill Flynt, “Threat Kingdom”, in Military Review, volume 80, number 4, United States Army Combined Arms Center, page 17:

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