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Malicious package

zrzjtff2e9RubyGems

Advisory published Updated

zrzjtff2e9 is a confirmed malicious RubyGems package (MAL-2026-9764) 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 zrzjtff2e9 (RubyGems)

MAL-2026-9764
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zrzjtff2e9

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

f5a21fd78dac7083c184b7512cd0aed11a91eacd09c9f50132964c5fa33ce311
b114009c8ccb8b14f20a58d45fce1c24a832b7911911b11e76b61f7a7eb999b1

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for zrzjtff2e9 (version 0.0.1).

  2. If you installed it — respond

    Remove zrzjtff2e9 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 zrzjtff2e9 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. zrzjtff2e9 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-2026-04415RLUA-2026-10353

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zrzjtff2e9-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

zrzjtff2e9 (RubyGems) malicious package — MAL-2026-9764 | O3 Security