MAL-2026-1090 Malicious code in isb (PyPI)

Malicious package Published
Package
isb
Registry
PyPI

What is MAL-2026-1090?

MAL-2026-1090 is a malicious package in isb, published on 28 Feb 2026.

Official description

Starting the module initiates an infostealer with a Telegram bot and RAT-like functionality and hardcoded credentials. The code automatically adds itself to autostart, collects some credentials, and also awaits further commands. The code is capable of exfiltrating browser data, files, taking screenshots, recording audio and modifying some system configurations.


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

Campaign: 2026-02-isb

Reasons (based on the campaign):

  • infostealer

  • exfiltration-browser-data

  • exfiltration-credentials

  • peristence-autorun

  • rat

  • spyware-like

  • files-exfiltration

  • iritating-computer-activity

What should I do about MAL-2026-1090?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

Sources

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