@lazyutil/dater

@lazyutil/dater (malicious versions 0.8.1, 0.9.2, 0.9.3, and 0.9.4, published by lazyutil-78muyg@wshu.net) is a trojanized npm package belonging to the wshu.net credential-stealer campaign. The campaign published trojanized look-alike utility packages across 12+ scopes whose publisher accounts all follow the pattern <scope>-<6 random chars>@wshu.net, with every scope created on June 4, 2026 in a ~40-minute burst. This package masquerades as a date library and ships real, working utility code so it passes a glance, while bundling a much larger malicious payload (lib/tzinit.js in the earliest variant, dist/lib/tzinit.cjs thereafter). package.json declares a postinstall hook (e.g. "node ./dist/lib/tzinit.cjs") that runs the payload automatically on npm install. The payload is heavily obfuscated with javascript-obfuscator (hex-named identifiers, a while (!![]) array-rotation IIFE, base64+RC4 string decoding, control-flow flattening, and runtime-decrypted module resolution to stay out of the static module graph). At runtime it is a Chromium browser credential stealer: it reads Chromium Cookies and Login Data and decrypts saved passwords protected by AES-256-GCM (the v10/v11 app-bound key schemes), then exfiltrates them over HTTPS using a spoofed Mozilla/5.0 user agent. Consistent with the campaign, the dangerous versions sit in mid-ranges while the latest tag (0.9.5) points to a scrubbed release with an empty scripts block. The 0.9.4 payload blob is byte-identical to @glitchpad/throttler@2.2.3 from the same campaign. Malicious payload dist/lib/tzinit.cjs (0.9.4) SHA-256: 68b4fe54a4c05cd0115535ebd4aa8d3cccb03ea5a685f440314814ba1b89e875. --- ## Source: amazon-inspector (362ed214c96b3a091355472cb7d03ca7dcb1c3b1c36daede92d4e7a04027cb8a) @lazyutil/dater is a trojanized repackage of the legitimate `timezonecomplete` library. Its package.json declares `postinstall: node./dist/lib/tzinit.cjs`, which runs automatically on `npm install`. tzinit.cjs is a 263 KB obfuscator.io-protected file (string-array RC4/XOR + control-flow flattening) that uses AES-256-GCM with a hardcoded key/IV/AAD to decrypt an embedded URL and host, then performs an HTTP GET to fetch a binary, writes it to disk, chmods it executable, and spawns it via `process.execPath` or `sh -c`. The dropper is platform-gated for win32/darwin/linux, retries with backoff, and re-execs the package's process. None of this is required for a date/timezone library and the legitimate upstream has neither a postinstall nor a tzinit.cjs. Trojanization signals: package description is copied verbatim from `timezonecomplete`, the `repository` field still points at the upstream author's git URL (`github.com/rogierschouten/timezonecomplete`), `homepage` points at a placeholder `github.com/lazyutil`, and `author` is a fresh ProtonMail identity unrelated to the original maintainer. Installing this package gives an attacker arbitrary code execution on the installer's machine. ## Source: ghsa-malware (68eed02a44947b12c3dcd6867dd5ff60f1414c9895daa1c04512474ee2333cc1) 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.