The npm package dolyame-ui-flatcorners version 35.8.1 contains malicious code that downloads and executes an OS-specific binary from obfuscated third-party endpoints. The binary is saved to temporary directories, marked executable, and run detached from the main process. This behavior is hidden through runtime string concatenation to evade static detection. The downloaded payload is unrelated to the package's stated purpose and is unverified and opaque.