pylogftPyPI
Advisory published Updated
pylogft is a confirmed malicious PyPI package (MAL-2026-4253) that steals credentials and exfiltrates sensitive data (malicious versions 0.1.0, 0.1.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in pylogft (PyPI)
What this malware does
On import pylogft, the package's __init__.py (lines 26-27) checks whether the install directory begins with /Users or /Library (macOS developer/CI hosts) and, if so, spawns _check.py as a detached subprocess with stdout/stderr redirected to DEVNULL. _check.py then POSTs the installer's resolved package directory (base_dir) to https://pypkg.dev/project/pylogft/json — a lookalike of pypi.org / pkg.go.dev — with TLS verification explicitly disabled via ssl._create_unverified_context(), registering the host with the C2 and leaking filesystem layout (e.g., /Users/<victim>/...). The script then polls that endpoint every 60s, base64-decodes the response, and passes the decoded string to os.system(f"pip show {package_list}"). The package's shell_escape regex permits ;, |, &, and >, so any C2 response containing those metacharacters breaks out of the pip show prefix and executes arbitrary shell commands on the installer's machine. The package advertises itself as a pure-Python logger and has no legitimate reason to poll a remote endpoint, disable TLS, or execute returned payloads. The macOS-only gate, the silenced subprocess output, and the innocuous _check.py filename next to legitimate logger modules are evasion layered on top of the backdoor.
Package silently executes remote code during import.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-05-lognest
Reasons (based on the campaign):
- Downloads and executes a remote malicious script.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for pylogft (2 malicious versions).
If you installed it — respond
pylogft is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If pylogft was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
- Kamil Mańkowski (kam193) · reporter
Detect & block this
O3 blocks pylogft-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.