MAL-2026-13339 Malicious code in dolyame-boxy-mobile-bnpl-card-panel (npm)

On require, bootstrap.js downloads a platform-specific binary from hardcoded Cloudflare Workers endpoints (oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev), writes it to /var/tmp or %TEMP% under a disguised name (e.g. dotnet_diag.exe,.cache_), chmods it 0755, and spawns it detached via /bin/sh -c or cmd. When HTTPS mirrors fail, the code falls back to a DNS-TXT covert channel against sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru: it queries a c.<domain> TXT record for a chunk count, then retrieves base64 chunks from 0.<domain>..N-1.<domain>, concatenates, base64-decodes, and hands the bytes to the same write-chmod-spawn sink. Destination hostnames and DNS domains are assembled at runtime from fragmented string arrays (e.g. ["oob-worker.cf103","-070.worker","s.de","v"].join("")) to evade static matching. A TTL cache at /tmp/.analytics_state throttles re-execution; opt-out exists only via undocumented environment variables. Package presents itself as a payment/device integration library, but the traced load-time behavior is fetch-and-execute of opaque attacker-controlled binaries.