Which versions of fosscalwands are malicious?

The following RubyGems versions of fosscalwands are flagged malicious: 0.0.1. Treat any of these as compromised.

How do I remediate fosscalwands if I installed it?

Remove fosscalwands 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.

I already installed fosscalwands — how do I know if it already compromised me?

If fosscalwands 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 fosscalwands part of a known attack campaign?

Yes — fosscalwands is associated with the RLMA-2026-02341, RLUA-2026-08118 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 fosscalwands across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for fosscalwands (version 0.0.1).

Malicious package

fosscalwandsRubyGems

Advisory published Jul 7, 2026Updated Sep 24, 2026

fosscalwands is a confirmed malicious RubyGems package (MAL-2026-7690) that executes malicious code on install (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in fosscalwands (RubyGems)

MAL-2026-7690

Immediate action

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

gem uninstall fosscalwands

Malicious versions

1 flagged

0.0.1

Indicators of compromise (SHA-256)

01317c58bffc7b8cd81316fe58d3778d95d5adc5186e3ae95954a5a742245cbb

921b516d4863b7a0aa4003b2cd44b95da9c633146a19646eec5a35a492969c80

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for fosscalwands (version 0.0.1).
If you installed it — respond
Remove fosscalwands 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.
Did it already run?
If fosscalwands 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. fosscalwands on RubyGems has been identified as a malicious package (version 0.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-02341RLUA-2026-08118

References

github.com

Credits

ReversingLabs · finder

Detect & block this

O3 blocks fosscalwands-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.

Malware detection Runtime egress monitoring

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