Which versions of blessclient are malicious?

The following PyPI versions of blessclient are flagged malicious: 0.0.1, 0.0.2. Treat any of these as compromised.

How do I remediate blessclient if I installed it?

blessclient 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.

I already installed blessclient — how do I know if it already compromised me?

If blessclient was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

Is blessclient part of a known attack campaign?

Yes — blessclient is associated with the GENERIC-standard-pypi-install-pentest, IN-MAL-2026-013048, IN-MAL-2026-013100 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find blessclient across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for blessclient (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging blessclient across your stack and pipelines.

Malicious package

blessclientPyPI

blessclient is a confirmed malicious PyPI package (MAL-2026-11067) that steals credentials and exfiltrates sensitive data (malicious versions 0.0.1, 0.0.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in blessclient (PyPI)

MAL-2026-11067

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

pip uninstall blessclient

What this malware does

The package name matches Lyft's internal python-blessclient and is published on the public index as a dependency-confusion tripwire. setup.py overrides the install command class (InstallWithCanary) to issue an HTTP GET to http://canarytokens.com/about/static/obeoafaz522zscu7248tqu4rh/submit.aspx during pip install, and blessclient/__init__.py fires the same beacon at import time via urllib.request.urlopen(_CANARY_URL). The beacon body carries only what an ordinary HTTP GET reveals (source IP, User-Agent); no environment variables, filesystem contents, or credentials are read or transmitted, and no code is fetched or executed. The destination is the canarytokens.com research service rather than attacker-controlled infrastructure. Installing this package discloses the fact and source of the install to whoever configured the canary token, and executes network I/O at install and import time without opt-out.

Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.

Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: GENERIC-standard-pypi-install-pentest

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.
The package overrides the install command in setup.py to execute malicious code during installation.

Malicious versions

2 flagged

0.0.10.0.2

Indicators of compromise (SHA-256)

cce3c8791da7093bb0d6aaf8b79f49e5cbbcc4114f075f60121fc99b31c74e09

82efbe82f1f4cdc513a33b4deeb7a811318155aaf4de1d4319dc54f8730f409b

cd5c7516a17b9f62deb6dae9f1f997ba97f86a900233f78da88f615d48ae1c77

Detection & response playbook

Credential / info stealer

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for blessclient (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging blessclient across your stack and pipelines.
If you installed it — respond
blessclient 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 blessclient was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks blessclient before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. blessclient on PyPI has been identified as a malicious package (versions 0.0.1, 0.0.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GENERIC-standard-pypi-install-pentestIN-MAL-2026-013048IN-MAL-2026-013100

References

Credits

Amazon Inspector · finder
Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks blessclient-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

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