---
id: MAL-2026-17240
title: Malicious code in aseitylab (PyPI)
summary: Malicious code in aseitylab (PyPI)
severity: critical
exploited: true
vendor: aseitylab
product: aseitylab
ecosystem: pip
affected:
  - aseitylab
published: '2026-09-28'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T04:30:05.450844192Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/MAL-2026-17240'
references:
  - url: >-
      https://www.virustotal.com/gui/file/d03c42c275f0dbc617428441508c49ae1adcbbc95af4eeb094bca4e4f8943f3e/detection
  - url: 'https://polygonscan.com/address/0x9c0a507300fd902787bb193d80fca5ce6e1bff9a'
  - url: 'https://bad-packages.kam193.eu/pypi/package/aseitylab'
  - url: 'https://pypi.org/project/aseitylab/0.1.0/'
tags:
  - osv
  - pip
  - malware
ingestedAt: '2026-09-29T07:20:57.365Z'
---

## Overview


---
_-= Per source details. Do not edit below this line.=-_

## Source: amazon-inspector (9b47f0f7a0776cad3d4c83604d35a0023a250d2f035e58129233095aa2b110a3)
aseitylab/_shimdata.py contains a large base85-encoded, zlib-compressed blob stored as DATA. aseitylab/compat.py defines _ensure_compat(), which base85-decodes and zlib-inflates DATA and passes the result to exec(compile(..., '<aseitylab-compat>', 'exec')). setup.py imports aseitylab.compat and invokes _ensure_compat() during package build/install, and aseitylab/__init__.py calls the same function on every import, so the decoded payload runs both when the package is installed and whenever it is imported. Execution is gated by environment variables (ASEITYLAB_COMPAT=0, DAS_STAGED=1) that allow the payload to be suppressed in build or test environments. The README advertises a pure-Python task-orchestration toolkit with no runtime dependencies, which does not require a compressed, encoded executable blob shipped as 'compatibility shim data'. MANIFEST.in additionally excludes file names (loader_payload.py, make_armed.py, armed.json, manifest.benign.json) consistent with a build harness that produces separate 'armed' and 'benign' tarballs. The contents of the executed payload are not inspectable from the shipped source; installing or importing the package hands arbitrary code execution to whatever DATA decodes to.

## Source: kam193 (24b99c2059065cbe44f7dac2f1d2878b237c58150c0890baa1856852e76fcb24)
During installation, obfuscated code is used to fetch code hidden in an image containing a Python application with a native extension module. This module holds an obfuscated infostealer which collects sensitive data and exfiltrates them to a C2 server retrieved from transaction history in the Polygon blockchain.


---

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


Campaign: 2026-09-donutautosellsrc


Reasons (based on the campaign):


 - infostealer


 - Downloads and executes a remote executable.


 - obfuscation


 - The package contains code to detect if it is running in a sandbox environment.


 - malware


 - native-extension


 - steganography


 - c2-in-blockchain


## Affected packages

- `aseitylab`

## Remediation

Refer to the advisory for the patched release.