olemus
kinnisründeohu tekitaja ja/või realiseerija
= one who creates or implements a advanced persistent threat

ülevaateid
https://download.microsoft.com/download/9/3/6/93652DC7-7B93-4A88-87AC-933F7D4516EB/Determined%20Adversaries%20and%20Targeted%20Attacks_EN.pdf

https://www.mitre.org/sites/default/files/publications/characterizing-effects-cyber-adversary-13-4173.pdf

https://acreto.io/putins-eleven-nation-state-hacker-teams-uncovered/

https://docs.rapid7.com/insightidr/apt-groups/