# MAL-2026-6208: Malicious code in fastercoding (PyPI)


- **Type:** Malicious package
- **Package:** `fastercoding` (PyPI)
- **Published:** 19 Jun 2026

## What is MAL-2026-6208?

MAL-2026-6208 is a malicious package in fastercoding, published on 19 Jun 2026. 

### Official description

The package exposes a single public function run() (re-exported from __init__.py) which, on Windows, downloads BackgroundSyncService.exe from https://raw.githubusercontent.com/manhhungdev0603/kl.py/refs/heads/main/BackgroundSyncService.exe, writes it to %PROGRAMDATA%\BackgroundSyncService\, and executes it via subprocess.Popen([local_filepath], shell=True) (fastercoding/core.py lines 7 and 21). The source is a personal GitHub user's repo named 'kl.py' on the mutable main branch with no hash or signature verification, and the dropped binary is given a system-service cover name ('BackgroundSyncService') and staged into PROGRAMDATA — shape consistent with a keylogger/persistence dropper. Package metadata is empty (no description, author, or homepage) and the package contains no other functionality — the dropper is the package's entire purpose. Any caller of the only advertised entrypoint executes attacker-controlled, mutable, unsigned code on their machine.

The package contains code to download and run a malicious executable. The executable contains a remote access trojan controlled via Telegram bot, with capabilities like a keylogger, screen recording, command execution. It also attempts to gain persistence via startup registry keys.

---

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

Campaign: 2026-06-fastercode

Reasons (based on the campaign):

 - Downloads and executes a remote executable.

 - peristence-autorun

 - uses-telegram-bot

 - keylogger

 - rat

 - spyware-like

## What should I do about MAL-2026-6208?

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-2026-6208 is a malicious package: fastercoding (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-2026-6208/ (Markdown: https://insights.sbomify.com/MAL-2026-6208/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6208

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-6208/
Summaries are generated and may contain mistakes; the official description above is the record.