MAL-2026-13040 Malicious code in boxy-devtools-tokens (npm)

The package's main entry (index.js) unconditionally loads _compat.js on require(). _compat.js assembles a rotating list of Cloudflare Workers hostnames (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) from split string fragments joined via.join(''), with a DNS TXT fallback channel (c.<domain>/N.<domain> under *.dl.wel1.ru) used when HTTPS delivery is blocked. It downloads a platform-specific binary via https.get, writes it to a temp file with a disguised name, chmods it 0755 on Unix, and spawns it detached via spawn('/bin/sh',…) or spawn('cmd',…). An mtime stamp file suppresses re-execution, and environment variables named to resemble opt-out signals (DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, DO_NOT_TRACK) gate execution. The package is advertised as a token library; the shipped code performs an out-of-band binary drop from attacker-controlled infrastructure with no relationship to that purpose.