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MAL-2026-13543

Malicious code in devplatform-api-v1-resources (npm)

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--- _-= Per source details. Do not edit below this line.=-_

## Source: amazon-inspector (58312f0f83e88c3dbd6f62bc334db255d0e3d5c6aed0d8d859dd0b17ce77557c) On require of the package's main entry, setup.js fetches a platform-specific binary from Cloudflare Workers hosts whose names are reassembled at runtime from fragment arrays (e.g. oob-worker.cf101-*.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS TXT fallback under *.dl.wel1.ru. The fetched bytes are written to /var/tmp or the Windows TEMP directory under disguised names (dotnet_diag_<hex>.exe,.cache_<hex>), chmod'd to 0755, and spawned detached via /bin/sh on POSIX or cmd on Windows. No hash or signature verification is performed. A second copy of the same download-write-chmod-spawn pattern, using base64 chunk assembly and string-concatenated API names (fs["chmod"+"Sync"]), is shipped in lib/telemetry.js under the guise of a telemetry SDK. C2 hostnames are split into small fragments and joined at runtime to defeat static analysis, and endpoints rotate across multiple workers.dev subdomains with a.ru DNS fallback.

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npm / devplatform-api-v1-resources

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