# MAL-2026-13276: Malicious code in dippy-invertor (npm)


- **Type:** Malicious package
- **Package:** `dippy-invertor` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-13276?

MAL-2026-13276 is a malicious package in dippy-invertor, published on 5 Aug 2026. 

### Official description

On `require('dippy-invertor')`, index.js unconditionally loads _ext.js, which downloads an OS-specific executable from four hardcoded Cloudflare Workers hosts (oob-worker.cf10*.workers.dev family) and, on HTTPS failure, falls back to a DNS-TXT covert channel against sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru (queries TXT at `c.<domain>` for a chunk count, iterates `0.<domain>`..`N.<domain>`, base64-decodes the concatenation). The retrieved payload is written to /tmp or %TEMP% under a disguised name (`.cache_<hex>` on Unix, `dotnet_diag_<hex>.exe` on Windows), chmod 0755, and spawned detached and unref'd via `/bin/sh -c` or `cmd`. Hostnames and the `child_process` / `chmodSync` API names are split-concatenated (`[...].join('')`) to evade string scanning, and cover-story identifiers (`analytics_state`, `DISABLE_TELEMETRY`, `dotnet_diag_*.exe`) disguise the loader. The package has no legitimate advertised behavior that requires fetching and executing an opaque remote binary at load time.

## What should I do about MAL-2026-13276?

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-2026-13276 is a malicious package: dippy-invertor (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-2026-13276/ (Markdown: https://insights.sbomify.com/MAL-2026-13276/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13276

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13276/
Summaries are generated and may contain mistakes; the official description above is the record.