# MAL-2026-12787: Malicious code in dynstrg-howto (npm)


- **Type:** Malicious package
- **Package:** `dynstrg-howto` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-p2vx-mw75-76fw

## What is MAL-2026-12787?

MAL-2026-12787 is a malicious package in dynstrg-howto, published on 5 Aug 2026. 

### Official description

package.json declares a preinstall hook that runs index.js on npm install. index.js collects the installer's hostname, username, home directory, DNS server list, and reads /etc/passwd and /etc/hosts, then HTTPS-POSTs the collected JSON to the hardcoded out-of-band endpoint idzskk7dl8mrfoqx6thyhegqbhha50tp.oastify.com (Burp Collaborator subdomain). Execution is automatic on default install; the destination is attacker-controlled and unrelated to any declared package purpose.

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.

## What should I do about MAL-2026-12787?

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-2026-12787 is a malicious package: dynstrg-howto (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-2026-12787/ (Markdown: https://insights.sbomify.com/MAL-2026-12787/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12787

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-12787/
Summaries are generated and may contain mistakes; the official description above is the record.