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 (291919ef20015ad326b92c506f2df9e710e72e659499bfd240c9b6453bf0fd82)
On require('claims-fixtures-shared'), index.js loads _helpers.js which immediately calls init(). init() reconstructs four Cloudflare Workers hostnames (oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev) and a set of DNS TXT-record resolvers (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru) via runtime array.join("") to evade static string scanners, then downloads a per-platform binary via https.get, writes it to /tmp or %TEMP% under a masquerading filename (.cache_<rnd> on unix, dotnet_diag_<rnd>.exe on Windows), fs.chmodSync 0o755, and spawns it detached via /bin/sh -c or cmd. No signature or hash verification is performed despite a '// SHA-256 integrity check' cover-story comment; a DNS TXT-record fallback channel and a.analytics_state lock file for rerun throttling are present. The package's stated purpose is a trivial fixtures helper, unrelated to any native binary. Env-var opt-outs (DISABLE_TELEMETRY, DO_NOT_TRACK) frame the code as telemetry while it stages and executes an arbitrary attacker-controlled payload.