# MAL-2026-17728: Malicious code in @galicia-toolkit-nestjs-20-lite/archetype (npm)


- **Type:** Malicious package
- **Package:** `@galicia-toolkit-nestjs-20-lite/archetype` (npm)
- **Published:** 9 Oct 2026

## What is MAL-2026-17728?

MAL-2026-17728 is a malicious package in @galicia-toolkit-nestjs-20-lite/archetype, published on 9 Oct 2026. 

### Official description

@galicia-toolkit-nestjs-20-lite/archetype is a dependency confusion package published to npm on 2026-10-09 by the account s4yhii__, targeting the internal @galicia-toolkit-* / @brick-v2 package namespaces with inflated versions (e.g. 999.0.x). Early versions resolve <hostname>.<tag>.dc.oob.s4yhii.com via DNS to beacon the victim's hostname. Later versions run `node index.js` from a preinstall hook, which loads a bundled native addon (prebuilds/<platform>-<arch>/metrics.node, Linux and Windows builds). The addon forks a detached process that collects hostname, username, OS/arch, cwd and the full values of CI/cloud secrets from environment variables (NPM_TOKEN, NODE_AUTH_TOKEN, GITHUB_TOKEN, ACTIONS_RUNTIME_TOKEN, ACTIONS_ID_TOKEN_REQUEST_TOKEN, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_SESSION_TOKEN, SYSTEM_ACCESSTOKEN, AZURE_DEVOPS_EXT_PAT and others) and sends them as JSON via HTTP POST /native to oob.s4yhii.com:9999.

On `npm install`, this package runs `node index.js || true` as a `preinstall` script. `index.js` loads a platform-specific native addon from `prebuilds/<platform>-<arch>/metrics.node`. The Linux and Windows binaries contain the hardcoded host `oob.s4yhii.com` and a `POST /native HTTP/1.0` request line with a JSON template carrying `src`, `pkg`, `h` (hostname), `u` (username), `os`, `arch`, `rel`, `cwd`, and `e` (an environment-variable dictionary). The native code reads a hardcoded set of credential-bearing environment variables including AWS access keys, `GITHUB_TOKEN`, `NPM_TOKEN`, `NODE_AUTH_TOKEN`, Azure DevOps PAT, and GitHub Actions runtime/ID tokens, and ships them to that host over a raw socket (getaddrinfo/connect/send; WS2_32 on Windows). The Linux variant uses fork+setsid to detach the exfiltration process from the install. The shipped JavaScript is a stub exporting empty `forRoot`/`createLogger`, with no real functionality beyond loading the addon. The package name uses a scoped namespace that resembles an internal toolkit and is published at version 999.0.3, a version-overshoot pattern consistent with dependency-confusion targeting private registries.

## What should I do about MAL-2026-17728?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

## Fix prompt for AI coding agents

```text
MAL-2026-17728 is a malicious package: @galicia-toolkit-nestjs-20-lite/archetype (npm). Every version was published to cause harm.

Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.

Reference: https://insights.sbomify.com/MAL-2026-17728/ (Markdown: https://insights.sbomify.com/MAL-2026-17728/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-17728

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-17728/
Summaries are generated and may contain mistakes; the official description above is the record.