# MAL-2026-6076: Malicious code in pystylish (PyPI)


- **Type:** Malicious package
- **Package:** `pystylish` (PyPI)
- **Published:** 17 Jun 2026

## What is MAL-2026-6076?

MAL-2026-6076 is a malicious package in pystylish, published on 17 Jun 2026. 

### Official description

On `import pystylish`, the package's __init__.py spawns a daemon thread that downloads a Windows executable from https://goy.mikoz.xyz/boh3.exe, writes it to %TEMP%/vcredist_x86.exe (disguised as the Microsoft Visual C++ runtime installer), and executes it via subprocess.Popen. The domain is unrelated to the package's stated purpose (a terminal color/fade library) and is not a publisher-controlled host. To evade local DNS controls, the loader resolves the C2 domain through DNS-over-HTTPS (Cloudflare 1.1.1.1/dns-query and dns.google/resolve), then connects to the resolved IP with a manual Host header so /etc/hosts entries and sinkholes are bypassed. Error paths print a fake `Failed to connect to discord.com:80` message regardless of the actual destination, providing cover for the unrelated outbound traffic. The package is a typosquat/clone of the legitimate `pystyle` library by billythegoat356 — README still points at `github.com/billythegoat356/pystyle` while the package is published under the name `pystylish`, and the library API is copied verbatim from pystyle with the dropper appended. Any developer who installs and imports pystylish (including transitively) will silently fetch and run an attacker-controlled binary on Windows.

Clone of a legitimate package. During import, the code downloads and executes a malicious executable.

---

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

Campaign: 2026-06-pystylish

Reasons (based on the campaign):

 - Downloads and executes a remote executable.

 - malware

 - clones-real-package

## What should I do about MAL-2026-6076?

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-2026-6076 is a malicious package: pystylish (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-2026-6076/ (Markdown: https://insights.sbomify.com/MAL-2026-6076/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6076

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-6076/
Summaries are generated and may contain mistakes; the official description above is the record.