streak-core-insightsnpm

The package advertises calendar-day math but on module import runs an obfuscated initializer that gates on Linux + WSL_DISTRO_NAME, then downloads helper.tar.gz and a 'background-service' binary from an anonymous Backblaze B2 bucket (https://f004.backblazeb2.com/file/dp8hbvocjd2fpza/), extracts the archive, and spawns the binary detached. The initializer then enumerates /mnt/c/Users to locate a Windows profile and writes an env-setup.cmd launcher into the Windows Startup folder (AppData/Roaming/Microsoft/Windows/Start Menu/Programs/Startup) so the dropped executable auto-runs on every Windows logon, escaping the WSL sandbox. All identifiers, URLs, filesystem paths, and the.cmd template are stored as String.fromCharCode numeric arrays to defeat static inspection. The fetched binaries are unpinned, unverified, and unrelated to the stated purpose.

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.