{"id":"MAL-2026-5273","title":"Malicious code in anthropy (PyPI)","summary":"Malicious code in anthropy (PyPI)","severity":"none","vendor":"anthropy","product":"anthropy","ecosystem":"pip","affected":["anthropy"],"published":"2026-06-05","updated":"2026-07-08","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/MAL-2026-5273","references":[{"url":"https://bad-packages.kam193.eu/pypi/package/anthropy"},{"url":"https://pypi.org/project/anthropy/0.0.4/"},{"url":"https://pypi.org/project/anthropy/0.0.2/"},{"url":"https://pypi.org/project/anthropy/0.0.3/"}],"tags":["osv","pip"],"ingestedAt":"2026-07-09T11:56:19.318Z","slug":"MAL-2026-5273","body":"## Overview\n\n\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (8fa5e8904e682bfc10273961eb25b914c8d79b89e2a6c923c32bb9b3233d41c2)\nThe 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.\n\n## Source: kam193 (4f399f7bce64b482a85876e01829154fd6031d69466c7d46543f1126eb12f854)\nDuring import, the package starts a reverse shell\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2026-06-anthropy\n\n\nReasons (based on the campaign):\n\n\n - The package contains code to create a reverse shell, allowing an attacker to execute any commands on the victim's machine.\n\n\n## Affected packages\n\n- `anthropy`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}