MAL-2026-6206

Dashboard / Malicious Package / MAL-2026-6206

MAL-2026-6206

Summary: Malicious code in fastercode (PyPI)

Details: Source: amazon-inspector (14de4534d4cf2290f5f54bc5929fa799b73dff2e6a03aa879ade141dfc6ea054) The package advertises itself as a Python performance helper ("Make your Python code run faster") and exposes a single public function `run()`. On Windows, calling `run()` fetches `BackgroundSyncService.exe` from `https://raw.githubusercontent.com/manhhungdev0603/kl.py/refs/heads/main/BackgroundSyncService.exe`, writes it to `%PROGRAMDATA%\BackgroundSyncService\`, and launches it via `subprocess.Popen([local_filepath], shell=True)` (fastercode/core.py:7-22). The source URL is a mutable branch reference on a personal GitHub account; the repo is named `kl.py` (suggestive of "keylogger.py"); the binary is unsigned, unpinned, and unrelated to the package's advertised purpose. All exceptions during download/execute are swallowed silently. Package metadata lists `author="Anonymous"` with no email or homepage, consistent with a throwaway publish account. Any developer who imports fastercode and calls its only public API on Windows runs an attacker-controlled executable persisted under PROGRAMDATA. Source: kam193 (1c2793304d30de27278e36f79685e9ca60f9f839d7a27d2ea39d8d22e36a8584) 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

References: https://www.virustotal.com/gui/file/85b5a4b34b8511367e9c9d230110e55eb811936db0cb6667ced4d25ce2e4d99a/detection, https://bad-packages.kam193.eu/pypi/package/fastercode, https://pypi.org/project/fastercode/0.1.0/, https://pypi.org/project/fastercode/1.0.0/, https://pypi.org/project/fastercode/0.1.1/