MAL-2026-13303 Malicious code in dolyame-boxy-desktop-bnpl-footer (npm)

Requiring dolyame-boxy-desktop-bnpl-footer causes platform.js to execute at load time: it reconstructs destination hostnames from split string arrays (oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev), downloads a platform-specific binary, writes it to /var/tmp/.cache<hex> on Unix or %TEMP%/dotnet_diag_<hex>.exe on Windows (masquerading as a.NET diagnostic file), chmods it 0755, and spawns it detached via /bin/sh -c '<path> &' or cmd.exe /c start /b. If HTTPS delivery fails, dnsChunked() falls back to a DNS-TXT covert channel under *.dl.wel1.ru (sdk./ext./pkg./net.dl.wel1.ru), resolving c.<domain> for a chunk count and reassembling base64 TXT records into the executable. Destinations and dangerous APIs are obfuscated via Array.join('') and dynamic property lookups (require('child_'+'process'), fs['chmod'+'Sync']). A second copy of the same dropper is bundled in lib/telemetry.js behind an 'Analytics SDK' cover story. No hash or signature verification is performed on the fetched binary.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.