# MAL-2026-12290: Malicious code in twork-data-services-customer-api-v2-customer-vip-status (npm)


- **Type:** Malicious package
- **Package:** `twork-data-services-customer-api-v2-customer-vip-status` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-xcx3-rr77-frhq

## What is MAL-2026-12290?

MAL-2026-12290 is a malicious package in twork-data-services-customer-api-v2-customer-vip-status, published on 5 Aug 2026. 

### Official description

On require of this package, index.js loads _platform.js which selects a platform-specific payload (linux_x64/linux_arm64/darwin/win32), downloads an opaque binary over HTTPS from a pool of *.workers.dev hosts, writes it to /var/tmp/.cache_<hex> or %TEMP%/dotnet_diag_<hex>.exe, chmods it 0755, and spawns it detached via /bin/sh or cmd with unref, so execution survives the parent process. Destination hostnames are not stored as plain literals — they are assembled at runtime from split fragments (e.g. ['oob-worker.cf101-a','df.worke','rs.d','ev'].join('')) to evade string scans. If HTTPS retrieval fails, the code falls back to DNS TXT lookups against numbered subdomains of dl.well1.site and reassembles a base64-encoded binary from the concatenated TXT records, bypassing HTTPS egress inspection. The disguised on-disk filenames (dotnet_diag_*,.cache_*), the anonymous Workers hosting, the absence of any hash or signature verification, and the covert DNS delivery channel are inconsistent with the package's advertised 'API client bindings' 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-2026-12290?

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-2026-12290 is a malicious package: twork-data-services-customer-api-v2-customer-vip-status (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-2026-12290/ (Markdown: https://insights.sbomify.com/MAL-2026-12290/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12290

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-12290/
Summaries are generated and may contain mistakes; the official description above is the record.