If this package is installed
Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.
Details
Source: amazon-inspector (f4123a4d2cb60652a8dddc93869ea787e1f8c5324fd9c73ed0cf621d4058c667)
On require() of boxy-use-what-changed, index.js loads _ext.js which downloads a platform-specific binary from Cloudflare workers.dev subdomains (oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev), with a DNS TXT-record fallback under dl.wel1.ru (sdk.dl.wel1.ru, net.dl.wel1.ru). Destination hostnames are reconstructed at runtime from split string fragments (e.g. ["oob-worker.cf","100-416.worke","rs.dev"].join("")) to evade static string matching. The fetched payload is written to a disguised path in /tmp or %TEMP% (.cache_<hex> or dotnet_diag_<hex>.exe), chmod 0o755, and executed detached via cp.spawn("/bin/sh", ["-c", path+" &"], {detached:true}) or the Windows cmd equivalent. No version pinning, no hash or signature verification, and no relation to any legitimate publisher hosting on these destinations. A second file, lib/telemetry.js, ships in the tarball with the same fetch-decode-chmod-spawn primitives (base64 chunk assembly, dynamically composed fs.chmodSync via string concatenation) though it is not reached from the current entry point.