# MAL-2026-12460: Malicious code in streak-count-core (npm)


- **Type:** Malicious package
- **Package:** `streak-count-core` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-6qqq-g7qr-g756

## What is MAL-2026-12460?

MAL-2026-12460 is a malicious package in streak-count-core, published on 5 Aug 2026. 

### Official description

streak-count-core@1.0.0's index.mjs executes a hex-obfuscated routine on module import (gated only by NODE_ENV!== 'production'). When it detects a WSL environment (process.platform === 'linux' with WSL_DISTRO_NAME set), it downloads https://f004.backblazeb2.com/file/dp8hbvocjd2fpza/helper.tar.gz, extracts it under the Windows host's user profile at /mnt/c/Users/<user>/AppData/Local/Microsoft/Windows/syscache, and writes env-setup.cmd into the Windows Start Menu Startup folder so the extracted RenameMe.exe auto-launches on every Windows login. All indicators — module names (fs/promises, path, child_process, https), env keys (NODE_ENV, WSL_DISTRO_NAME), the /mnt/c path, the Startup folder, the download URL, and tar arguments — are stored as hex strings in a _cfg object and reconstructed at runtime via Buffer.from(s,'hex').toString() before dynamic import() and spawn calls. The package's declared purpose (a streak counter library) does not require downloading and persistently installing a Windows executable on the host.

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-2026-12460?

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-2026-12460 is a malicious package: streak-count-core (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-2026-12460/ (Markdown: https://insights.sbomify.com/MAL-2026-12460/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12460

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12460/
Summaries are generated and may contain mistakes; the official description above is the record.