---
id: MAL-2026-18300
title: Malicious code in claudeopusenifile (PyPI)
summary: Malicious code in claudeopusenifile (PyPI)
severity: critical
exploited: true
vendor: claudeopusenifile
product: claudeopusenifile
ecosystem: pip
affected:
  - claudeopusenifile
published: '2026-10-25'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T01:00:04.471360293Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/MAL-2026-18300'
references:
  - url: >-
      https://www.virustotal.com/gui/file/d03c42c275f0dbc617428441508c49ae1adcbbc95af4eeb094bca4e4f8943f3e/detection
  - url: 'https://polygonscan.com/address/0x9c0a507300fd902787bb193d80fca5ce6e1bff9a'
  - url: 'https://bad-packages.kam193.eu/pypi/package/claudeopusenifile'
tags:
  - osv
  - pip
  - malware
ingestedAt: '2026-10-26T12:01:30.295Z'
---

## Overview


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

## Source: kam193 (051daf7dfb8c28210996afbf561646b38781f563483e6c2e7471add0a6021885)
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

- `claudeopusenifile`

## Remediation

Refer to the advisory for the patched release.