Which versions of sprox-c160-4fossil are malicious?

The following RubyGems versions of sprox-c160-4fossil are flagged malicious: 0.0.1. Treat any of these as compromised.

How do I remediate sprox-c160-4fossil if I installed it?

Remove sprox-c160-4fossil 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 sprox-c160-4fossil — how do I know if it already compromised me?

If sprox-c160-4fossil 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 sprox-c160-4fossil part of a known attack campaign?

Yes — sprox-c160-4fossil is associated with the RLMA-2026-03536, RLUA-2026-09442 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 sprox-c160-4fossil across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for sprox-c160-4fossil (version 0.0.1).

Malicious package

sprox-c160-4fossilRubyGems

Advisory published Jul 7, 2026Updated Sep 24, 2026

sprox-c160-4fossil is a confirmed malicious RubyGems package (MAL-2026-8885) 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 sprox-c160-4fossil (RubyGems)

MAL-2026-8885

Immediate action

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

gem uninstall sprox-c160-4fossil

Malicious versions

1 flagged

0.0.1

Indicators of compromise (SHA-256)

686d681c3c354a7ca1384442655869580d416480fd8df80cf0979d67dd81263a

1ba9873bee5e180e4eeb5cc83ad3f838d7bb979ccd712fcf3949a5534095a82f

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for sprox-c160-4fossil (version 0.0.1).
If you installed it — respond
Remove sprox-c160-4fossil 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 sprox-c160-4fossil 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. sprox-c160-4fossil 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-2026-03536RLUA-2026-09442

References

github.com

Credits

ReversingLabs · finder

Detect & block this

O3 blocks sprox-c160-4fossil-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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