MAL-2026-17883

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MAL-2026-17883

Summary: Malicious code in py-worm (PyPI)

Details: Importing py-worm's `agentaix` module downloads a mutable Python file from `https://raw.githubusercontent.com/anonrider404/pypl/refs/heads/main/readme.txt` to a temporary `.py` file and launches it without a visible console on Windows. Versions 0.1.0 and 2.0.0 do this directly during import; version 2.0.1 starts a daemon thread during import to perform the same action. The package's CLI and GUI entry points import this module. The remote file's Git history contains a Windows remote file management client that registers persistence through an HKCU Run entry, polls `https://googleforum.pythonanywhere.com` for commands, and supports file upload, download, deletion, and command execution. An earlier remote-file revision is byte-identical to the `readme.txt` payload reported in MAL-2026-17752 (`agentaix`); the 39,931-byte `agentaix/gui.py` is also byte-identical across that package and all py-worm releases. The remote file is mutable; its contents at the time of any particular victim import and actual execution on victim systems have not been established. Source: amazon-inspector (8fd8563e18894311d651012477647efc1a169f465a9cf89db5e7245b0b6ffcc9) The package name 'py-worm' is suggestive of self-propagation behavior, but no a static rule fired and no traced code behavior was captured for this version. Without concrete evidence of credential harvest, outbound exfiltration, install-time code execution, or publish-token enumeration in the shipped files, the package cannot be classified as a confirmed supply-chain attack from the available signals alone. Source: kam193 (d4c5838f30da7c1f684305ec0704ef37e963793449390f5b13a4e06212ccbd9d) The package installs a persistent job that allows the attacker for exfiltrating files and executing remote code on the victim's machine. Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-10-agentaix Reasons (based on the campaign): - files-exfiltration - peristence-autorun - The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine. - rat - persistence - Downloads and executes a remote malicious script.

References: https://bad-packages.kam193.eu/pypi/package/py-worm, https://files.pythonhosted.org/packages/59/de/799235425a54e0fd7ca9ac5306dd21675b390b1c0241caa1115f1371eb95/py_worm-2.0.1-py3-none-any.whl, https://github.com/anonrider404/pypl/blob/9395c5802b11bc088925d7adf6e2f66b8b0709fd/readme.txt, https://osv.dev/vulnerability/MAL-2026-17752, https://pypi.org/project/py-worm/2.0.0/