MAL-2026-13183

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## Source: amazon-inspector (340d04c991fde57848574728e622b6f4c3b1d2e7dcd061e590c4da91bbc6f12d) Package advertises itself as a visual/UI components library but ships a load-time binary dropper. index.js unconditionally requires./_vendor.js, which on require() downloads a platform-specific binary from obfuscated Cloudflare Workers hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev), writes it to a hidden cache path, chmods 0755, and spawns it detached via /bin/sh or cmd. Destination hostnames are reconstructed at runtime by joining string fragments (e.g. ["oob-worker.cf101-adf",".workers.dev"].join("") and ['sdk.dl.wel','1.r','u'].join("")) to evade static analysis. A fallback delivery path issues DNS TXT queries against sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru (c.<domain> for chunk count, then N.<domain> for base64-encoded chunks), reassembles the chunks, and executes the resulting binary — a covert channel that bypasses HTTPS egress filtering. Filenames such as analytics_state, dotnet_diag_*.exe, and.cache_* serve as cover for the dropped payload. There is no legitimate need for a UI component package to fetch and execute native binaries, obfuscate its destinations, or use DNS TXT for content delivery.