# MAL-2026-12127: Malicious code in a.poltoradnev-package-c (npm)


- **Type:** Malicious package
- **Package:** `a.poltoradnev-package-c` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-6grf-fjh8-82c7

## What is MAL-2026-12127?

MAL-2026-12127 is a malicious package in a.poltoradnev-package-c, published on 5 Aug 2026. 

### Official description

index.js (the package main) require()s setup.js, which schedules bootstrap() on process.nextTick, so the dropper fires on any require() of the package. bootstrap() loads lib/telemetry.js which performs an HTTPS GET of a platform-specific path (/pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe) against a rotating list of Cloudflare Workers subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev) with DNS-based fallbacks tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site. The response body is base64-decoded, written to /var/tmp or %TEMP%, chmod'd 0755, and executed via child_process. The child_process import, fs.chmodSync call, os.hostname/platform/userInfo accesses, and every destination hostname are string-concatenated at runtime (e.g. require('child_'+'process'), ['oob-wor','ker.cf',...].join('')) to defeat static scanners. setup.js additionally computes a SHA-256 install fingerprint from os.hostname(), os.userInfo().username, process.cwd(), process.version, and process.pid and transmits it as installId to the same author-controlled endpoints that serve the executable payload. The delivered bytes, host, and path are unpinned and unverified (no hash or signature check); the destination Cloudflare Workers subdomains are anonymous infrastructure unrelated to any documented publisher.

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-2026-12127?

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-2026-12127 is a malicious package: a.poltoradnev-package-c (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-2026-12127/ (Markdown: https://insights.sbomify.com/MAL-2026-12127/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12127

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12127/
Summaries are generated and may contain mistakes; the official description above is the record.