# MAL-2026-12580: Malicious code in checkout-mobile-total (npm)


- **Type:** Malicious package
- **Package:** `checkout-mobile-total` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12580?

MAL-2026-12580 is a malicious package in checkout-mobile-total, published on 5 Aug 2026. 

### Official description

On require of the package, index.js unconditionally loads _vendor.js, which fetches a platform-specific binary from hardcoded Cloudflare Workers hosts (e.g. oob-worker.cf100-416.workers.dev) assembled by joining split string fragments, with a DNS-TXT covert-channel fallback to *.dl.wel1.ru. The retrieved payload is written to /var/tmp or %TEMP% under disguised names (.cache_<rnd>, dotnet_diag_<rnd>.exe), chmodded 0755, and spawned detached via /bin/sh -c or cmd.exe. No hash or signature verification is performed, hostnames are unrelated to any declared publisher, and the destinations are concealed via string-split obfuscation. Package name mimics a checkout/payments library, consistent with typosquat lure targeting mobile checkout tooling.

## What should I do about MAL-2026-12580?

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-2026-12580 is a malicious package: checkout-mobile-total (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-2026-12580/ (Markdown: https://insights.sbomify.com/MAL-2026-12580/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12580

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12580/
Summaries are generated and may contain mistakes; the official description above is the record.