Which versions of pytasler are malicious?

The following PyPI versions of pytasler are flagged malicious: 1.0.0, 1.0.1. Treat any of these as compromised.

How do I remediate pytasler if I installed it?

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

If pytasler 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 pytasler part of a known attack campaign?

Yes — pytasler is associated with the RLMA-2024-04581 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 pytasler 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 pytasler (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging pytasler across your stack and pipelines.

Malicious package

pytaslerPyPI

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

MAL-2023-8588

Immediate action

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

pip uninstall pytasler

What this malware does

Malicious packages campaign targeting developers, payload is hidden using Steganography, exfiltrate host information

Malicious versions

2 flagged

1.0.01.0.1

Indicators of compromise (SHA-256)

9209d9bf3f5a8205e05d9cb3e590cb8ad8cdf90cedb528dd047828c38b308361

4043496e1f8ee3b03ea33b818f617fd7e7f88ba6350ac697c123f98200ff066e

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 pytasler (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging pytasler across your stack and pipelines.
If you installed it — respond
pytasler 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 pytasler 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 pytasler 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. pytasler on PyPI has been identified as a malicious package (versions 1.0.0, 1.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2024-04581

References

Credits

Checkmarx · finder
ReversingLabs · finder

Detect & block this

O3 blocks pytasler-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