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Malicious package

zjinas1RubyGems

Advisory published Updated

zjinas1 is a confirmed malicious RubyGems package (MAL-2026-9605) 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 zjinas1 (RubyGems)

MAL-2026-9605
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zjinas1

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

e9e55f1a10b29db616f6bb6b83880b060044f34a38f0dd22bbc5d3716bc1bd7c
eebb7cb70f71d97a8581fbbf2423824ca97c4cd3a6b3623231b334dedc4de651

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for zjinas1 (version 0.0.1).

  2. If you installed it — respond

    Remove zjinas1 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 zjinas1 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. zjinas1 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-2026-04256RLUA-2026-10193

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zjinas1-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

zjinas1 (RubyGems) malicious package — MAL-2026-9605 | O3 Security