MAL-2026-1085

Dashboard / Malicious Package / MAL-2026-1085

MAL-2026-1085

Summary: Malicious code in ctf-toolkit (PyPI)

Details: Source: kam193 (e47981485066b674150cc4d9d3709e41707e69111f188e54e772becc7349ab89) The package states to contain a modified curl library to allow low-level request modifications. However, there is also undisclosed malicious behavior: 1. The package installs a .pth file directly in the site-packages directory, effectively running a special code on each Python usage. 2. This code performs "TLS context warm-up" by contacting a URL (Github) in the background, in a separate process; this is suspicious on its own as it's unclear how a separate process can warm up further requests in the main process, but... 3. ...besides the URL given in the code above, the library always contacts a hardcoded URL, identifying itself as a VPN client. Additionally, there is no source code of the modified library anywhere, and the related Github hosting the package code account is 1-day old. Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-02-ctf-toolkit Reasons (based on the campaign): - The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.

References: https://github.com/Wang-SecurityResearch/ctf_toolkit, https://web.archive.org/web/20260228111147/https://github.com/Wang-SecurityResearch, https://bad-packages.kam193.eu/pypi/package/ctf-toolkit