Which versions of rfetchd are malicious?

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

How do I remediate rfetchd if I installed it?

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

If rfetchd 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 rfetchd part of a known attack campaign?

Yes — rfetchd is associated with the RLMA-2026-03170, RLUA-2026-09057 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 rfetchd across my projects, lockfiles, and CI pipelines?

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

Malicious package

rfetchdRubyGems

Advisory published Jul 7, 2026Updated Sep 24, 2026

rfetchd is a confirmed malicious RubyGems package (MAL-2026-8519) 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 rfetchd (RubyGems)

MAL-2026-8519

Immediate action

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

gem uninstall rfetchd

Malicious versions

1 flagged

0.0.1

Indicators of compromise (SHA-256)

0d7fe3baffb458fa3a445f3348bbbc69345690f1b0ee4afa516be7bee356e36a

a2ed72132d67b82fc8dd279dcf01e1a47804fe7fba58b3c7185eeb246a58ce0f

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for rfetchd (version 0.0.1).
If you installed it — respond
Remove rfetchd 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 rfetchd 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. rfetchd 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-2026-03170RLUA-2026-09057

References

github.com

Credits

ReversingLabs · finder

Detect & block this

O3 blocks rfetchd-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

All malware advisories How O3 detects malware Vulnerability database