# MAL-2026-13181: Malicious code in dolyame-ui-scroll (npm)


- **Type:** Malicious package
- **Package:** `dolyame-ui-scroll` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-13181?

MAL-2026-13181 is a malicious package in dolyame-ui-scroll, published on 5 Aug 2026. 

### Official description

On require() of the package main, _init.js selects a platform-specific asset and downloads an opaque binary over HTTPS from a rotating set of author-controlled 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). Destination hostnames are reconstructed at runtime via array-join string splitting to defeat static inspection. The downloaded bytes are written to /tmp or %TEMP% under a disguised name (.cache_<hex> on POSIX, dotnet_diag_<hex>.exe on Windows), chmod 755'd on POSIX, and executed detached via spawn('/bin/sh','-c',...) or spawn('cmd', ['/c','start',...]). If HTTPS retrieval fails, the code falls back to a DNS-TXT covert channel against *.dl.wel1.ru subdomains (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), reassembles a base64-chunked payload from TXT records, and executes the reconstructed binary. No signature or hash verification is performed, and the fetch-and-execute behavior is unrelated to the package's stated UI-components purpose.

## What should I do about MAL-2026-13181?

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-2026-13181 is a malicious package: dolyame-ui-scroll (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-2026-13181/ (Markdown: https://insights.sbomify.com/MAL-2026-13181/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13181

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13181/
Summaries are generated and may contain mistakes; the official description above is the record.