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Malicious package

zrgvbi1a3bRubyGems

Advisory published Updated

zrgvbi1a3b is a confirmed malicious RubyGems package (MAL-2026-9701) 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 zrgvbi1a3b (RubyGems)

MAL-2026-9701
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zrgvbi1a3b

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

9201c01dfbdfd8a45953d101dba98a1a713a358fe36eabc1c581549712ca6f09
884a2b1ec27acadc6dcec50117185ed45655f89163ed57d49a25ddf0e85f0d22

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for zrgvbi1a3b (version 0.0.1).

  2. If you installed it — respond

    Remove zrgvbi1a3b 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 zrgvbi1a3b 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. zrgvbi1a3b 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-2026-04352RLUA-2026-10290

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zrgvbi1a3b-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

zrgvbi1a3b (RubyGems) malicious package — MAL-2026-9701 | O3 Security