# MAL-2026-12745: Malicious code in devplatform-rest-resources-v1 (npm)


- **Type:** Malicious package
- **Package:** `devplatform-rest-resources-v1` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-hmhf-45wm-x62q

## What is MAL-2026-12745?

MAL-2026-12745 is a malicious package in devplatform-rest-resources-v1, published on 5 Aug 2026. 

### Official description

On require() of the package, index.js loads _bootstrap.js which selects a platform-specific endpoint, fetches an opaque native binary over HTTPS from author-controlled Cloudflare Workers subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT fallback to *.dl.wel1.ru, writes it to /tmp or %TEMP% under disguised names (.cache_<rand> on POSIX, dotnet_diag_<rand>.exe on Windows), chmods 0o755 on POSIX, and spawns it detached with output suppressed via spawn("/bin/sh", ["-c", fp+" &"], {detached:true}).unref() (and a cmd equivalent on Windows). The C2 hostnames, fallback DNS domain, and the child_process module name are assembled from array joins (e.g. ["oob-worker.cf102-","baf.work","ers.de","v"].join("") and ['sdk.dl','.wel1.ru'].join("")) to hide indicators from static scanners. Additional cover-story mechanisms include stamp-based execution gating (STAMP_TTL) and honoring DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK env vars while presenting the fetched artifacts as diagnostic/analytics files. No signature verification, no version pinning, and the payload is a bare native executable. Every installer that installs or requires this package receives and executes attacker-controlled code.

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-2026-12745?

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-2026-12745 is a malicious package: devplatform-rest-resources-v1 (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-2026-12745/ (Markdown: https://insights.sbomify.com/MAL-2026-12745/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12745

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12745/
Summaries are generated and may contain mistakes; the official description above is the record.