Which versions of swa8403foss are malicious?

The following RubyGems versions of swa8403foss are flagged malicious: 0.0.1. Treat any of these as compromised.

How do I remediate swa8403foss if I installed it?

Remove swa8403foss 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 swa8403foss — how do I know if it already compromised me?

If swa8403foss 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 swa8403foss part of a known attack campaign?

Yes — swa8403foss is associated with the RLMA-2026-03561, RLUA-2026-09474 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 swa8403foss across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for swa8403foss (version 0.0.1).

Malicious package

swa8403fossRubyGems

Advisory published Jul 7, 2026Updated Sep 24, 2026

swa8403foss is a confirmed malicious RubyGems package (MAL-2026-8910) 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 swa8403foss (RubyGems)

MAL-2026-8910

Immediate action

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

gem uninstall swa8403foss

Malicious versions

1 flagged

0.0.1

Indicators of compromise (SHA-256)

45710964f92096411cd1be1795bc96fa15169c5aa38a001c6023b2e35b2be23d

af483821d4f915c3062aba049f91cc63b50b9138deecddff48ea36f9bea05fcd

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for swa8403foss (version 0.0.1).
If you installed it — respond
Remove swa8403foss 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 swa8403foss 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. swa8403foss 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-2026-03561RLUA-2026-09474

References

github.com

Credits

ReversingLabs · finder

Detect & block this

O3 blocks swa8403foss-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

Explore

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