Which versions of fkask are malicious?

The following PyPI versions of fkask are flagged malicious: 3.1.8.dev0. Treat any of these as compromised.

How do I remediate fkask if I installed it?

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

If fkask 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 fkask part of a known attack campaign?

Yes — fkask is associated with the RLMA-2025-00464, 2024-12-reqesst, RLUA-2026-00326 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 fkask across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for fkask (version 3.1.8.dev0).

Part of a larger attack: 2024-12-reqesst published 12 malicious packages. See the full campaign →

Malicious package

fkaskPyPI

Advisory published Dec 24, 2024Updated Mar 19, 2026

fkask is a confirmed malicious PyPI package (MAL-2025-925) that steals credentials and exfiltrates sensitive data (malicious version 3.1.8.dev0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in fkask (PyPI)

MAL-2025-925

Immediate action

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

pip uninstall fkask

What this malware does

Importing the module downloads and starts an infostealer attempting to exfiltrate data and establishing persistence through autorun directory.

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

Campaign: 2024-12-reqesst

Reasons (based on the campaign):

infostealer
peristence-autorun
typosquatting
exfiltration-generic
Downloads and executes a remote executable.
clones-real-package
dependency-confusion
exfiltration-browser-data
exfiltration-crypto

Malicious versions

1 flagged

3.1.8.dev0

Indicators of compromise (SHA-256)

b4930756e2b05ca1620f71278c0f6d077ddaaac641368d2445bd1fa87e2a1830

a376a88b7a918549016d4e5c14f26ee85d6e7cecdd1f00f746d37f81dac6f8d3

d3bbbce78f8816ead148780776c4371cdd08775ee74639fea33b9598f8bb4b2b

5dec60f75d579194609a57b3de91581ecbe129db8011f71ff48aff9ca49e2317

6ac69d74914f3126b5ec2a4eafcc2c3fed5dccdf0662c72ef96576c8f21a7c01

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for fkask (version 3.1.8.dev0).
If you installed it — respond
fkask 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 fkask 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. fkask on PyPI has been identified as a malicious package (version 3.1.8.dev0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-004642024-12-reqesstRLUA-2026-00326

References

Credits

Kamil Mańkowski (kam193)
ReversingLabs · finder

Detect & block this

O3 blocks fkask-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

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