https://www.bleepingcomputer.com/news/security/north-korean-hackers-exploit-critical-teamcity-flaw-to-breach-networks/

Microsoft says that the North Korean Lazarus and Andariel hacking groups are exploiting the CVE-2023-42793 flaw in TeamCity servers to deploy backdoor malware, likely to conduct software supply chain attacks.

TeamCity is a continuous integration and deployment server organizations use as part of their software development infrastructure.