Remote Access Trojan Was a Major Threat in 2019
The key event of 2019 according to Proofpoint researchers who monitored the threats was the RemoteAccess or RAT Trojan, unfortunately 2020 does not promise to reduce this threat, on the contrary it is gaining popularity.
https://www.securitymagazine.com/articles/91593-remote-access-trojan-was-a-threat-highlight-in-2019