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 (bb2e70575aedbdc1f873900c0d6f187183ba2cc4088a93caea3d71ab78dc1260)
shopping-shared-atom-mobile-cart-counter@20.6.6 loads _loader.js from index.js at require() time. _loader.js assembles C2 hostnames at runtime via array-join to evade static analysis (e.g. oob-worker.cf101-adf.workers.dev, cf103-070/cf102-baf/cf99-9b3.workers.dev) and includes a DNS-TXT chunked fallback under win.dl.well1.site. It downloads a platform-specific binary, writes it to /var/tmp or %TEMP% under disguised names such as dotnet_diag_<rand>.exe or.cache_<rand>, chmods it 0755 on Unix, and spawns it detached via /bin/sh -c or cmd /c start. A marker file '.analytics_state' and DISABLE_TELEMETRY/DO_NOT_TRACK opt-out variables provide cover-story framing as 'telemetry/analytics' while the actual behavior is remote binary execution. The fetched binary is opaque and unrelated to the package's stated mobile cart-counter purpose.
Source: ghsa-malware (ea3523dbd8a34e2a9d29fb5f7896bbb94a79daca6f010ec656b758e657b1cffc)
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.