# MAL-2026-13712: Malicious code in bigtime (PyPI)


- **Type:** Malicious package
- **Package:** `bigtime` (PyPI)
- **Published:** 10 Aug 2026

## What is MAL-2026-13712?

MAL-2026-13712 is a malicious package in bigtime, published on 10 Aug 2026. 

### Official description

The package presents itself as a `time` module wrapper, but its `__init__.py` invokes `qwe900.init`, which performs two exfiltration behaviors on import. First, `_home_folders()` enumerates the installer's Desktop, Downloads, and Documents directories and `_find_all_files()` walks them; a background thread tails file contents and POSTs them to a Discord webhook whose URL is stored base64-encoded in `_WEBHOOK_B64` and decoded at import time. Second, `init()` replaces `builtins.open` process-wide with `_patched_open`, wrapping every returned file object in `_WatchedFile`; any subsequent `write()` on any file in the host process is copied to the same webhook. The embed title `New Token Captured` names the operator's intent to capture credentials and tokens flowing through the installer's own code. The base64-encoded destination and the `time`-wrapper cover story hide the exfiltration channel from casual source review.

The package contains hidden code to overwrite the built-in "open" function and exfiltrate every write to opened files. Exfiltration watcher is also attached to other files in user's home directory.

---

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

Campaign: 2026-08-bigtime

Reasons (based on the campaign):

 - files-exfiltration

## What should I do about MAL-2026-13712?

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

## Fix prompt for AI coding agents

```text
MAL-2026-13712 is a malicious package: bigtime (PyPI). Every version was published to cause harm.

Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.

Reference: https://insights.sbomify.com/MAL-2026-13712/ (Markdown: https://insights.sbomify.com/MAL-2026-13712/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13712

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-13712/
Summaries are generated and may contain mistakes; the official description above is the record.