Which versions of sumo-py-cli are malicious?

The following PyPI versions of sumo-py-cli are flagged malicious: 99.99.99. Treat any of these as compromised.

How do I remediate sumo-py-cli if I installed it?

sumo-py-cli 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 sumo-py-cli — how do I know if it already compromised me?

If sumo-py-cli 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.

Is sumo-py-cli part of a known attack campaign?

Yes — sumo-py-cli is associated with the RLMA-2024-11174, GENERIC-standard-pypi-install-pentest, RLUA-2026-00786 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 sumo-py-cli across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for sumo-py-cli (version 99.99.99).

Malicious package

sumo-py-cliPyPI

Advisory published Jul 26, 2024Updated Mar 19, 2026

sumo-py-cli is a confirmed malicious PyPI package (MAL-2024-11715) that steals credentials and exfiltrates sensitive data (malicious version 99.99.99). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in sumo-py-cli (PyPI)

MAL-2024-11715

Immediate action

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

pip uninstall sumo-py-cli

What this malware does

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

1 flagged

99.99.99

Indicators of compromise (SHA-256)

504f2580d546e21d70334d83a4d81f3d59294d38bd9b3f82db2c8284e0a89216

8a999ec53654855b98c94663cccb9513781a7ffed0ef915a695a0c3a920fcaf8

6ed9233fda861428b541d5a3188300bb67c877f6998c43e808dc5910b7113b4d

ff31f4b93d445723f8df3e175790fd1a8350d9c91851b44ebc5cb8986d163d12

7d883fc276c89db59b9657c93354bba725df7d6eac608c88827fffc5c6a139fb

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for sumo-py-cli (version 99.99.99).
If you installed it — respond
sumo-py-cli 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 sumo-py-cli 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

No. sumo-py-cli on PyPI has been identified as a malicious package (version 99.99.99 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2024-11174GENERIC-standard-pypi-install-pentestRLUA-2026-00786

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193)
ReversingLabs · finder

Detect & block this

O3 blocks sumo-py-cli-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

Explore

All malware advisories How O3 detects malware Vulnerability database