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Malicious package

zjfull1RubyGems

Advisory published Updated

zjfull1 is a confirmed malicious RubyGems package (MAL-2026-9590) 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 zjfull1 (RubyGems)

MAL-2026-9590
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zjfull1

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

d4af4a10b44e41589fdbb2b38a307eaea92f2c42ce33142ba42e6d52f0a3c8a7
a0138d93682d089af86e0168de0e16daeeb64c6a92efdcd1d913c032183467cc

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for zjfull1 (version 0.0.1).

  2. If you installed it — respond

    Remove zjfull1 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 zjfull1 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. zjfull1 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-2026-04241RLUA-2026-10178

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zjfull1-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

zjfull1 (RubyGems) malicious package — MAL-2026-9590 | O3 Security