MAL-2026-12452

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## Source: amazon-inspector (fb43194ddda04c3dffa5cb6bea02c8bc6edba8623acf172c5da744b2488e13b0) On require, _compat.js selects a platform-specific payload path and downloads an opaque binary from one of four Cloudflare Workers hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev). Origin hostnames are assembled from split-string fragments joined at runtime to hide the destinations from static inspection. The fetched bytes are written to a hidden file staged as a system-artifact lookalike (dotnet_diag_<hex>.exe on Windows,.cache_<hex> on Unix) in /tmp or %TEMP%, chmod 0755, and executed via spawn("/bin/sh", ["-c", <path> + " &"], {detached:true, stdio:"ignore"}).unref() (or the cmd equivalent on Windows). If the HTTPS fetch fails, the loader falls back to a DNS TXT covert channel, querying subdomains under dl.well1.site (tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site) for base64-encoded payload chunks that are concatenated and executed the same way. The package advertises itself as a domain-event handler; the fetched executable content has no relationship to that stated purpose.