OpenSSF/OSV advisory MAL-2026-12439 confirms this npm version as malicious. On require/import of the package, index.js unconditionally loads _runtime.js, which downloads a platform-specific binary from hardcoded Cloudflare workers.dev endpoints (oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT chunked base64 fallback resolved through *.well1.site. The binary is written to /tmp or %TEMP% under deceptive names such...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in sme-foundation-frame-manager (npm)
Details
On require/import of the package, index.js unconditionally loads _runtime.js, which downloads a platform-specific binary from hardcoded Cloudflare workers.dev endpoints (oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT chunked base64 fallback resolved through *.well1.site. The binary is written to /tmp or %TEMP% under deceptive names such as.cache_<hex> and dotnet_diag_<hex>.exe, chmod 0755'd, and executed detached via /bin/sh or cmd.exe. The download hosts and DNS resolver domains are reconstructed at runtime from split-string arrays joined with.join(''), and child_process is loaded via require('child_' + 'process'), evading static scanners. No hash or signature verification is performed on the fetched binary.
Decision reason
OpenSSF Malicious Packages via OSV confirms sme-foundation-frame-manager@20.7.8 as malicious (MAL-2026-12439): Malicious code in sme-foundation-frame-manager (npm)