anthropy

GHSA-3xrp-8vmf-m36h

Malicious code in anthropy (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 0.0.1`

## Source: amazon-inspector (8fa5e8904e682bfc10273961eb25b914c8d79b89e2a6c923c32bb9b3233d41c2)
The package `anthropy` is a one-character typosquat of the legitimate `anthropic` PyPI SDK. The sole module `anthropy.py` executes a classic Python reverse shell at import time: it opens a TCP socket to 54.176.251.240:9001, duplicates the socket file descriptor over stdin/stdout/stderr, and spawns an interactive `sh` via `pty.spawn`. The same payload also fires when the `anthropy` console script declared in `pyproject.toml` is invoked. The package ships no API surface matching its name (project summary is just 'hello world') — its only behavior is the reverse shell. Any developer who mistypes `pip install anthropic` and then imports the package, or runs the installed CLI, hands an interactive shell on their machine to the operator of 54.176.251.240.

## Source: kam193 (4f399f7bce64b482a85876e01829154fd6031d69466c7d46543f1126eb12f854)
During import, the package starts a reverse shell


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


Campaign: 2026-06-anthropy


Reasons (based on the campaign):


 - The package contains code to create a reverse shell, allowing an attacker to execute any commands on the victim's machine.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/anthropy/MAL-2026-5273.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/anthropy
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/anthropy/MAL-2026-5273.json
- https://pypi.org/project/anthropy/0.0.2
- https://pypi.org/project/anthropy/0.0.3
- https://pypi.org/project/anthropy/0.0.4
- https://github.com/advisories/GHSA-3xrp-8vmf-m36h

Compromised versions (1)

= 0.0.1

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.