Malicious code in devplatform-react-micro-frontend (npm)

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Source: amazon-inspector (38577b4e463996b1df19599f016c8ad16ebb36d8650effd666c93d844364c475)

devplatform-react-micro-frontend@35.2.1 is a lure package whose main entry auto-loads adapter.js on require. adapter.js selects a platform-specific asset, downloads an opaque binary over HTTPS from a rotating list of Cloudflare *.workers.dev hosts (oob-worker.cf101-adf.workers.dev and siblings cf100/cf102/cf103), and if HTTPS fails reassembles up to 2000 numbered TXT records under *.dl.wel1.ru into a base64 payload. The bytes are written to a temp path under a masquerading name (.cache, dotnet_diag.exe), chmod 755 on POSIX, and spawned detached via /bin/sh -c or cmd. Network destinations are assembled by joining substring arrays (e.g. ["oob-worker.cf101-a","df.workers.","dev"].join(""), ['sdk.dl.w','el1.','ru'].join("")) to evade static analysis. A duplicate dropper is shipped as lib/telemetry.js framed as an "Analytics SDK", using string-concat obfuscation of require("child_"+"process") and fs["chmod"+"Sync"] to reach the same write-chmod-spawn sink. Installing or requiring the package results in remote-controlled binary execution on the host.

Source: ghsa-malware (c0cc6b5c52ea4bfa63cba8d1ccf60738a476118b01aff6c0b421c548a67f47f7)

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.