MAL-2026-12298 Malicious code in twork-data-services-proxy-invest-symbols-list (npm)

On require() of this package, index.js loads init.js which immediately downloads a platform-specific binary from hardcoded Cloudflare Workers endpoints (oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT base64 fallback via *.dl.well1.site. The fetched bytes are written to a temp path under disguised names (e.g. dotnet_diag.exe,.cache_), chmod 0755, and detached-spawned via /bin/sh -c or cmd.exe start /b. Hostnames are assembled at runtime from split string arrays (e.g. ['oob-worker.cf100-416.w','orkers.','dev'].join('')) to defeat static hostname scanning. Destination is not the publisher's infrastructure, the fetched payload is opaque, and the package name has no legitimate reason to fetch and run a binary at import time. Platform gating, cooldown flag files, and telemetry-styled opt-out env-var names are consistent with a dropper attempting to blend in.

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.