new-ecro-1npm

Package new-ecro-1 impersonates the legitimate big.js library by shipping its source verbatim (banner, license, and homepage pointing at MikeMcl/big.js). Inside the load-time IIFE in both big.js and big.mjs at line 606, an injected block silently executes const doc = require("parket-slot"); doc.from_str().then(e => {}).catch(e => {}), wrapped in a try/catch that swallows all errors. The parket-slot package is not declared in this manifest's dependencies (which instead lists new-solt-1), so the require resolves to whatever loader-controlled package happens to be present in the surrounding install tree, executing its from_str() on import. The combination of name-impersonation, undeclared cross-package require, and silent error suppression is a loader stub for attacker-controlled code that runs the moment any consumer imports this 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.