---
id: "MAL-2026-14389"
kind: "package"
aliases: ["MAL-2026-14389"]
title: "Malicious code in envprovision (PyPI)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "envprovision", "fixed": [], "affected": "= 1.2.0; = 1.3.0; = 1.4.0", "ecosystem": "pypi"}]
ecosystems: ["pypi"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-08-23T21:37:06+00:00"
first_seen_at: "2026-10-26T20:51:56+00:00"
updated_at: "2026-10-26T21:12:36+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-14389", "first_seen_at": "2026-10-26T20:51:56+00:00"}]
---

# Malicious code in envprovision (PyPI)

## Affected

- pypi:envprovision affected = 1.2.0; = 1.3.0; = 1.4.0 fixed ?

## Timeline

- 2026-10-26T20:51:56+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-14389

## From the sources

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

## Source: amazon-inspector (a414ad5404fdeeb23c37f1580aeee8175765ba8613e8fadd1a0254bf0e25d2f6)
envprovision 1.4.0 presents itself as an environment-diagnostics helper but its public `check()`/`sync()` API, on Windows, fetches a JSON manifest from a base64-obfuscated URL that decodes to https://env-metadata.up.railway.app/vbv_a8F3kL92xQ/manifest.json, downloads the referenced binary to a temp path, and executes it. TLS verification is disabled on both the manifest fetch and the binary download (ctx.check_hostname=False, ctx.verify_mode=ssl.CERT_NONE), so the payload can also be substituted by any on-path attacker. The dropped binary is invoked with NSIS silent-install flags (`/S`, `/NCRC`) built by character-list concatenation and hidden-window creation flags, then a follow-on `syshelpear.exe` is spawned detached (CREATE_NO_WINDOW|DETACHED_PROCESS) from a user-writable ProgramFiles/LOCALAPPDATA location as a persistence helper. After execution, `wevtutil cl Application` and `wevtutil cl System` are invoked to erase Windows event logs. The endpoint obfuscation, TLS-off fetch-and-execute of an opaque binary from a publisher-mismatched Railway subdomain, silent-install flag assembly, detached helper launch, and anti-forensic log clearing are inconsistent with the advertised diagnostics purpose and constitute an installer-side binary dropper with persistence.

## Source: kam193 (cf3a48b407852ec03ead22bb8c16c03f252ba5fafa5c86ed1a739427e7d7d869)
Exported functions hide the malicious functionality. On Windows, it downloads and installs a malicious executable, and disguises it as a system utility. After installation, the code attempts to cover its tracks by cleaning logs and removing downloaded files. The installed executable is a heavily obfuscated malware with multiple sandbox evasion techniques, finally running an infostealer identifying itself as "Snow Stealer". It collects at least browser data and modifies cryptowallet applications.


---

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


Campaign: 2026-08-envprovision


Reasons (based on the campaign):


 - Downloads and executes a remote executable.


 - action-hidden-in-lib-usage


 - covering-tracks


 - persistence


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


 - obfuscation


 - malware


 - infostealer


 - exfiltration-browser-data


 - exfiltration-crypto

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_