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Malicious package

zwkopt6RubyGems

Advisory published Updated

zwkopt6 is a confirmed malicious RubyGems package (MAL-2026-9888) that executes malicious code on install (malicious version 0.0.3494). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in zwkopt6 (RubyGems)

MAL-2026-9888
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zwkopt6

Malicious versions

1 flagged
0.0.3494

Indicators of compromise (SHA-256)

9c85bc82b731dbbb289868ce94ebe91bba43426436e3a9f07141524245656862
19191681df55202ade08fcd62746187650fbef478b6ee0c2ade6f0f16fd2894c

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for zwkopt6 (version 0.0.3494).

  2. If you installed it — respond

    Remove zwkopt6 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 zwkopt6 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. zwkopt6 on RubyGems has been identified as a malicious package (version 0.0.3494 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-04539RLUA-2026-10477

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zwkopt6-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

zwkopt6 (RubyGems) malicious package — MAL-2026-9888 | O3 Security