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Malicious package

zfetchrdio11lk0iRubyGems

Advisory published Updated

zfetchrdio11lk0i is a confirmed malicious RubyGems package (MAL-2026-9566) 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 zfetchrdio11lk0i (RubyGems)

MAL-2026-9566
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zfetchrdio11lk0i

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

48c1d000a1fb2881e685c0cf2f7d2e088862370d314eb38c3627f69c70c81604
798fdbd7f3a1793d31d20aad0902e233a471a360894a9ecb4d633aeb9b281855

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for zfetchrdio11lk0i (version 0.0.1).

  2. If you installed it — respond

    Remove zfetchrdio11lk0i 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.

  3. Did it already run?

    If zfetchrdio11lk0i 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. zfetchrdio11lk0i 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-2026-04217RLUA-2026-10154

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zfetchrdio11lk0i-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.

Explore

zfetchrdio11lk0i (RubyGems) malicious package — MAL-2026-9566 | O3 Security