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Malicious package

asynctestpythonPyPI

Malicious code in asynctestpython (PyPI) Remove it immediately and rotate any exposed credentials.

MAL-2025-2939
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
pip uninstall asynctestpython

What this malware does

Infostealer with multiple possibilities, but not auto-activating on installation. There are already multiple attempts to publish it, with different innocent-looking names.

The campaign contains the with Infostealer itself and packages that include it as dependency and triggered.

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

Campaign: 2025-02-multis

Reasons (based on the campaign):

  • infostealer

  • The malicious code is intentionally included in a dependency of the package

Malicious versions

1 flagged
0.1

Indicators of compromise (SHA-256)

929e7aac59882b3f73eae18de1a5e7777a84a4711f64e8fab23136014a349d73
4859350d7ee0a4b1299d33326c0fe69656ee4fa8bca791ab0533e97e821e4347
fd21bb1c5c93539b976f7a2d7083394bebaacea6ca24c52cebf7b292798158a7
85db75678f8f5ee43347ea2ab5f0aa3cd8cebafa896635990bcc3ac37da32610
730cd7be175c8c84aa10759bcc2e46ad9173bf38d20dc15daa968c0778de468d

Detection & response playbook

Credential / info stealer
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for asynctestpython (version 0.1). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging asynctestpython across your stack and pipelines.

  2. If you installed it — respond

    asynctestpython 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.

  3. Did it already run?

    If asynctestpython 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.

  4. How O3 protects you

    O3 blocks asynctestpython 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. asynctestpython on PyPI has been identified as a malicious package (version 0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-019372025-02-multisRLUA-2026-00092

References

Credits

  • Kamil Mańkowski (kam193)
  • ReversingLabs · finder

Detect & block this

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

asynctestpython (PyPI) malicious package — MAL-2025-2939 | O3 Security