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Malicious package

zwkopt8RubyGems

Advisory published Updated

zwkopt8 is a confirmed malicious RubyGems package (MAL-2026-9890) that executes malicious code on install (malicious version 0.0.3497). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in zwkopt8 (RubyGems)

MAL-2026-9890
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zwkopt8

Malicious versions

1 flagged
0.0.3497

Indicators of compromise (SHA-256)

742083761c627e7251d18f9c29b39847a0d0bef8b040f07d68d48e76a56cb6fa
baae9c1b8f2977e91af929f7ffdfaea5ff5020378ca7c3e86bd53e29ae1a4c4d

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for zwkopt8 (version 0.0.3497).

  2. If you installed it — respond

    Remove zwkopt8 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 zwkopt8 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. zwkopt8 on RubyGems has been identified as a malicious package (version 0.0.3497 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-04541RLUA-2026-10479

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zwkopt8-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

zwkopt8 (RubyGems) malicious package — MAL-2026-9890 | O3 Security