# MAL-2026-3754: Malicious code in chalk-pack (npm)


- **Type:** Malicious package
- **Package:** `chalk-pack` (npm)
- **Published:** 14 May 2026

## What is MAL-2026-3754?

MAL-2026-3754 is a malicious package in chalk-pack, published on 14 May 2026. 

### Official description

Package is named `chalk-pack` (impersonating `chalk`) with keywords and `index.js` impersonating `lodash`; `index.js` is a stub that self-describes as 'Just a dummy module. The real payload is in postinstall.js'. On `npm install`, `postinstall.js` executes a two-part stealer: (1) credential harvester — reads `~/.npmrc`, `~/.env`, and `~/.git-credentials`, extracts npm auth tokens (`npm_[a-zA-Z0-9]{36}` and `//registry.npmjs.org/:_authToken=...`), and scrapes environment variables shaped like tokens/API keys/DB URLs/cloud/payment credentials; (2) crypto-wallet stealer — iterates 71 hardcoded Chromium/Brave/Edge/Firefox extension IDs for MetaMask, Phantom, Coinbase, Trust, Binance, OKX, Ledger, Trezor, Rabby, Keplr, Solflare, BitKeep, etc., reads `Local Extension Settings/<extId>/*.log`, regex-matches `vault`, `seed`, `mnemonic`, `privateKey`, and encrypted wallet JSON, and also walks `~/Documents`, `~/Desktop`, `~/Downloads` for BIP39-word-count-matching files. All collected data is POSTed as JSON to `http://149.28.127.35:8888` (plaintext HTTP, bare IP) hardcoded in `const C2=process.env.C2_URL||'http://149.28.127.35:8888'` at postinstall.js:7. The file header advertises itself as 'Token harvester + Crypto wallet scanner / Runs on npm install. Silent. Zero trace.' and every fs/http call is wrapped in `try{}catch(e){}` to suppress errors. Multiple independent attack fingerprints co-occur: hardcoded C2 in a lifecycle hook, installer-secret credential-file reads, wallet extension ID list, BIP39 seed-phrase scanner, and typosquat of a top-registry package — each independently sufficient.

## What should I do about MAL-2026-3754?

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-2026-3754 is a malicious package: chalk-pack (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-2026-3754/ (Markdown: https://insights.sbomify.com/MAL-2026-3754/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-3754

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-3754/
Summaries are generated and may contain mistakes; the official description above is the record.