path-addon-extendnpm

path-addon-extend presents itself as a copy of Node's built-in path module. On module load, path.js issues an HTTPS GET to a base64-obscured URL that decodes to https://json.extendsclass.com/bin/567893d4e220 and passes the response's .content field directly to eval(). The destination is a public JSON-bin service whose contents can be mutated at any time by the publisher (or anyone in possession of the bin token), giving arbitrary remote code execution in any process that requires this package. The endpoint is stored as a base64 literal decoded via atob(...) at call time rather than as a plain string, concealing the destination in a package that otherwise mirrors the Node core path module.

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.