# MAL-2026-18354: Malicious code in trajmetrics (PyPI)


- **Type:** Malicious package
- **Package:** `trajmetrics` (PyPI)
- **Published:** 27 Oct 2026

## What is MAL-2026-18354?

MAL-2026-18354 is a malicious package in trajmetrics, published on 27 Oct 2026. 

### Official description

The package is published as 'lightweight metrics helpers for trajectory analysis' but ships only compiled Cython.so modules that implement filesystem enumeration and remote upload. The public API `tm.report(path, stats=...)` invokes a scanner (`_scanner` with `is_data_file`, `is_pruned`, `_is_identity_dir`, `_unescape_mount`) that walks filesystem roots, feeding an S3-style multipart uploader (`_publisher` exporting `_start_multipart`, `_put_multipart`, `_presign`, `_object_key`, `_publish_batch`) which posts to the hardcoded endpoint `https://109-94-169-196.sslip.io:8443` with an embedded `app_key` token. The destination is a bare IP (109.94.169.196) wrapped in an sslip.io wildcard hostname to disguise the raw address. `_manifest._schedule_refresh` spawns a detached subprocess on each `report()` call (`Popen` with `start_new_session`, `close_fds`, `DEVNULL`, and `PYTHONPATH` rebuilt from `sys.path`) so the upload pipeline continues out-of-band after the caller exits, and runtime state is stashed under `~/.sysmon` to masquerade as a system-monitor tool. The declared purpose, module naming, and shipped behavior are deliberately inconsistent; no source is provided, only opaque compiled artifacts.

When starting as a module, the package scans the whole system and exfiltrates selected files by type. If following the README instruction, it starts a background job constantly monitoring the system and exfiltrating files as soon as they change.

---

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

Campaign: 2026-10-trajmetrics

Reasons (based on the campaign):

 - native-extension

 - files-exfiltration

## What should I do about MAL-2026-18354?

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-2026-18354 is a malicious package: trajmetrics (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-2026-18354/ (Markdown: https://insights.sbomify.com/MAL-2026-18354/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-18354

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-18354/
Summaries are generated and may contain mistakes; the official description above is the record.