Malicious code in statist-browser-typed-client-sme.rko.tariffs.web (npm)

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Source: amazon-inspector (d52851f17c7c1a340dd9999cf89369ffffd6fbe5bac9aa1b441bdc42ce320067)

On require() of this package, index.js loads compat.js which selects a platform-specific payload path, fetches an opaque binary over HTTPS from one of three string-obfuscated *.workers.dev hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev), and falls back to a DNS TXT covert channel on *.dl.well1.site (tin/tina/ldr/win.dl.well1.site) if HTTPS fails. The fetched bytes are written to a temp file with a cover-story name (dotnet_diag.exe on Windows, /var/tmp/.cache_ on Unix), chmod 0755, and spawned detached via /bin/sh -c or cmd /c start. C2 hostnames are assembled at runtime from split-string arrays joined with '' to evade static analysis. There is no signature or hash verification, and the fetched binary is unrelated to the package's stated 'web adapter' purpose. A cooldown marker is written to suppress re-execution.

Source: ghsa-malware (29a2a0d522406d0128194553c60de18b585809950484c55520855bcd266dac62)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.