MAL-2026-12308 Malicious code in vvvedernikov-test-another-test (npm)

On require of the package, index.js loads bootstrap.js which selects a platform/arch-specific asset path, fetches opaque bytes over HTTPS from one of three obfuscated Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS TXT fallback over subdomains of dl.well1.site (tin/tina/ldr/win), writes the payload to a randomized path under /var/tmp/.cache<rand> or %TEMP%\dotnet_diag_<rand>.exe, chmods it 0755 on POSIX, and spawns it detached via /bin/sh -c or cmd /c start. Hostnames are assembled at runtime via array-join and require("child_"+"process") to evade static inspection, with an install-once stamp at /tmp/.analytics_state and cover-story naming ('analytics', 'telemetry', 'dotnet_diag'). A second copy of the drop-and-exec primitives (base64 buffer decode, chmodSync 0o755, /bin/sh -c spawn) is shipped in lib/telemetry.js framed as an 'Analytics SDK'.

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.