# MAL-2026-12056: Malicious code in @zzzgenesis00/mnemonic-to-key (npm)


- **Type:** Malicious package
- **Package:** `@zzzgenesis00/mnemonic-to-key` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12056?

MAL-2026-12056 is a malicious package in @zzzgenesis00/mnemonic-to-key, published on 5 Aug 2026. 

### Official description

On npm install, postinstall.js executes and enumerates installer-side secrets: files under ~/.ssh (non-.pub private keys), ~/.npmrc, ~/.gitconfig, Chrome/Chromium/Firefox profile stores (Cookies, Login Data, key4.db), and cryptocurrency wallet directories (.bitcoin,.ethereum,.solana,.metamask,.exodus,.electrum, and similar). It also runs `npm whoami` and `git config user.email` and reads a list of credential-shaped environment variables including NPM_TOKEN, NODE_AUTH_TOKEN, GITHUB_TOKEN, AWS keys, MNEMONIC, SEED_PHRASE, ETHEREUM_PRIVATE_KEY, and WALLET_PRIVATE_KEY. The collected data is sent via HTTPS GET to api.telegram.org using a hardcoded bot token and chat_id, with a backup POST to a hardcoded subdomain of serveousercontent.com at path /collect. The postinstall file is disguised with a `module.exports = require('./index.js')` passthrough and a header comment describing it as environment verification, and exfiltration is delayed with a randomized 1.5–3.5s timer to run after install output completes. Behavior is unrelated to the package's advertised mnemonic-to-key purpose.

## What should I do about MAL-2026-12056?

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-2026-12056 is a malicious package: @zzzgenesis00/mnemonic-to-key (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-2026-12056/ (Markdown: https://insights.sbomify.com/MAL-2026-12056/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12056

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12056/
Summaries are generated and may contain mistakes; the official description above is the record.