DNS-over-HTTPS for malware communication
https://www.bleepingcomputer.com/news/security/chinese-hackers-use-dns-over-https-for-linux-malware-communication/
The Chinese threat group 'ChamelGang' infects Linux devices with a previously unknown implant named 'ChamelDoH,' allowing DNS-over-HTTPS communications with attackers' servers.
The particular threat actor was first documented back in September 2021 by Positive Technologies; however, the researchers only focused on the Windows toolkit.