statist-browser-typed-client-coretech.web.metrics@20.1.8

On require() of the package, _init.js selects a platform-specific asset, fetches an opaque binary via https.get from one of three hardcoded Cloudflare workers.dev hosts whose names are reconstructed from split-string arrays (oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev), writes it to /var/tmp or %TEMP% under a disguised name (.cache_<rnd> on Unix, dotnet_diag_<rnd>.exe on Windows), chmods 0755, and spawns it detached via spawn('/bin/sh',['-c',fp+' &']) or spawn('cmd',...). A DNS-TXT fallback channel resolves numbered subdomains under dl.well1.site (also assembled from fragmented array joins) and base64-decodes the concatenated TXT records when HTTPS retrieval fails. A hidden stamp file (.analytics_state) with a ~6.3-hour TTL throttles re-execution to establish recurring background execution, and the code short-circuits only on well-known opt-out envs (DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK), impersonating legitimate telemetry artifacts. The package name and telemetry cover story do not match the observed behavior: fetching opaque attacker bytes and executing them detached is a canonical binary-runner dropper. ## Source: ghsa-malware (90cc41b3eebdcc98e1029c6bd67225397224c7bc14806958720846c4905946c7) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.