Malicious code in devplatform-spa-route-tree (npm)

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Source: amazon-inspector (eabd446648c0aff2fa8f21202eeee1f46366ff6678c7811f951ff7f2413616cd)

On require() of devplatform-spa-route-tree, index.js loads loader.js which downloads a platform-specific binary from hostnames assembled via array-join string splits — Cloudflare Workers subdomains (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT chunked fallback under *.dl.wel1.ru. The fetched bytes are written to /tmp/.cache on Unix or %TEMP%\dotnet_diag_.exe on Windows (masquerading as.NET diagnostic tooling), chmod 0755, and spawned detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}) or the Windows cmd equivalent. Destination hostnames are split across array literals and reassembled at runtime to evade static matching, and environment-variable checks for DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK are used as cover framing. The fetched binary is opaque, unpinned, unverified, and served from non-publisher infrastructure.