Which versions of fairseqn are malicious?

The following PyPI versions of fairseqn are flagged malicious: 92.6. Treat any of these as compromised.

How do I remediate fairseqn if I installed it?

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

If fairseqn 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 fairseqn part of a known attack campaign?

Yes — fairseqn is associated with the 2024-11-byted-dast 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 fairseqn across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for fairseqn (version 92.6).

Part of a larger attack: 2024-11-byted-dast published 183 malicious packages. See the full campaign →

Malicious package

fairseqnPyPI

Advisory published Nov 6, 2024Updated Dec 12, 2025

fairseqn is a confirmed malicious PyPI package (MAL-2024-10585) that steals credentials and exfiltrates sensitive data (malicious version 92.6). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in fairseqn (PyPI)

MAL-2024-10585

Immediate action

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

pip uninstall fairseqn

What this malware does

A campaign of probably pentest packages flooding PYPI. Installing the package or importing the module triggers reporting basic info like hostname, path and the username to the package author. There is no other purpose of the package.

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: 2024-11-byted-dast

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.
typosquatting
dependency-confusion

The OpenSSF Package Analysis project identified 'fairseqn' @ 92.6 (pypi) as malicious.

It is considered malicious because:

The package communicates with a domain associated with malicious activity.

Malicious versions

1 flagged

92.6

Indicators of compromise (SHA-256)

36614c75ad105892bd6a3bbc86de17d6f87b02f6beb0055004efc76feee24ca3

74f198cffd33e3888a7987ccf30b24220043d269cd931621304174064131d340

cbda5e9aa1e5d5d78d04668e2141988e942e1746cd1d895743a72724abc997e7

96049e3162dfc854d0e1581a711afd55235e4c007704caaa22fa6932cf54a43d

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for fairseqn (version 92.6).
If you installed it — respond
fairseqn 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 fairseqn 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. fairseqn on PyPI has been identified as a malicious package (version 92.6 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2024-11-byted-dast

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193)
OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks fairseqn-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

All malware advisories How O3 detects malware Vulnerability database