MAL-2026-13146

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## Source: amazon-inspector (aa4592f76ef0995b4e3c8b0cc15c00862cf594cbaebbfcd2bf25d2640bbf6012) On require('dolyame-ui-codemods'), index.js loads _polyfill.js, which reconstructs remote hostnames from split string-fragment arrays joined at runtime (assembling oob-worker.*.workers.dev subdomains and sdk/ext/pkg/net.dl.wel1.ru), selects a platform-specific endpoint, downloads a binary over HTTPS, writes it to /var/tmp or %TEMP% under a disguised name resembling dotnet_diag, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe. A DNS-TXT-record fallback channel retrieves chunked base64 payloads from numbered subdomains of dl.wel1.ru when HTTPS delivery fails. A cooldown stamp file suppresses repeat execution and environment-variable checks gate execution to evade sandboxes. The package is advertised as a UI toolkit and has no legitimate need for a platform-native binary, obfuscated hostname assembly, or a DNS covert channel. Installing or importing this package causes remote code execution on the host.