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OpenAdvisories
Malicious MAL-2026-5273

anthropy

PyPI package · versions 0.0.1, 0.0.2, 0.0.3, 0.0.4, 0.0.5, 0.0.6

Reported Jun 5, 2026 · Updated Jul 8, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

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.

Indicators of compromise

Shown defanged and not clickable. Search any indicator to find other packages using it.

Domains

IP addresses