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Malicious package

zwkact5RubyGems

Advisory published Updated

zwkact5 is a confirmed malicious RubyGems package (MAL-2026-9859) that executes malicious code on install (malicious version 0.0.3290). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in zwkact5 (RubyGems)

MAL-2026-9859
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zwkact5

Malicious versions

1 flagged
0.0.3290

Indicators of compromise (SHA-256)

fdfb16391e35359694bd0dd3cd57380ec9f0808577a13782451a20e109b51f2e
85966a9590cdfbc2121909b41adab49ad498fc69adf4b843b5aacf08d582eed8

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for zwkact5 (version 0.0.3290).

  2. If you installed it — respond

    Remove zwkact5 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 zwkact5 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. zwkact5 on RubyGems has been identified as a malicious package (version 0.0.3290 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-04510RLUA-2026-10448

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zwkact5-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

zwkact5 (RubyGems) malicious package — MAL-2026-9859 | O3 Security