What does the s3ffs malware do?

Package uses the template from https://github.com/thegoodhackertv/malpip to explore building malicious PyPI packages. Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: SCRIPT_KIDDIE-thegoodhacker-paquete 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. - Package uses simple pre-prepared tools to create a low-quality malicious action.

Which versions of s3ffs are malicious?

The following PyPI versions of s3ffs are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate s3ffs if I installed it?

s3ffs 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 s3ffs — how do I know if it already compromised me?

If s3ffs 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 s3ffs part of a known attack campaign?

Yes — s3ffs is associated with the RLMA-2025-03028, SCRIPT_KIDDIE-thegoodhacker-paquete, RLUA-2026-00742 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 s3ffs across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for s3ffs (version 1.0.0).

Part of a larger attack: SCRIPT_KIDDIE-thegoodhacker-paquete published 11 malicious packages. See the full campaign →

Malicious package

s3ffsPyPI

Advisory published Aug 5, 2024Updated Mar 19, 2026

s3ffs is a confirmed malicious PyPI package (MAL-2025-5131) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in s3ffs (PyPI)

MAL-2025-5131

Immediate action

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

pip uninstall s3ffs

What this malware does

Package uses the template from https://github.com/thegoodhackertv/malpip to explore building malicious PyPI packages.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: SCRIPT_KIDDIE-thegoodhacker-paquete

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.
Package uses simple pre-prepared tools to create a low-quality malicious action.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

47454639de2f4c04e6b146eef198b4717d5fde8d4dca97a78a0a04dc3f17b15c

825baa2dc9aed6a92150c7426b5e565c5d70765659e750fe2c45bdc95de7edf3

bcbd170ded254c386778d86dbd56a4d2fc5e7dfdeb37bd17fa2198e85e5c93c7

5783ff979fcb12a6f9c4011a87c93092e0cb8a044b7d631ae037442cb96cfbb4

f03d243c57e789a25b76b064eebddf8818ac1d645476753dd29dbb246a652e22

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for s3ffs (version 1.0.0).
If you installed it — respond
s3ffs 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 s3ffs 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. s3ffs on PyPI has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-03028SCRIPT_KIDDIE-thegoodhacker-paqueteRLUA-2026-00742

References

Credits

Kamil Mańkowski (kam193)
ReversingLabs · finder

Detect & block this

O3 blocks s3ffs-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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