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Malicious package

requestss3PyPI

Advisory published Updated

requestss3 is a confirmed malicious PyPI package (MAL-2025-972) that executes malicious code on install (malicious version 3.3.3.3). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in requestss3 (PyPI)

MAL-2025-972
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
pip uninstall requestss3

What this malware does

Packages that might be part of testing for pentesting / malicious activity / joy, with suspicious activity that does not present any real harm.

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-simple-tests

Reasons (based on the campaign):

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

Malicious versions

1 flagged
3.3.3.3

Indicators of compromise (SHA-256)

5c1919a6dceacc2422a7ccb9e2e41ad542331796200dad33cb7b44b48a52520c
6da81a1b9fddbafb79b42ac09a07809d7028a7285a073e4ffaa95482c181f4a9
1bfd2f315e97954adea4ee625dec63e7faf224270260aea1f9515ea35843b4ee
f1705071f9917892e3c957ad2a65f43f81a0217e1c771f2f3589e61bd6a67f83
aea10ac6fe8faad5af8032815ee3bc98e3bc3c77d08d138098a2908397b11e47

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for requestss3 (version 3.3.3.3).

  2. If you installed it — respond

    Remove requestss3 from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If requestss3 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. requestss3 on PyPI has been identified as a malicious package (version 3.3.3.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-00513GENERIC-simple-testsRLUA-2026-00712

References

Credits

  • Kamil Mańkowski (kam193)
  • ReversingLabs · finder

Detect & block this

O3 blocks requestss3-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Explore

requestss3 (PyPI) malicious package — MAL-2025-972 | O3 Security