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Malicious package

zwkact1RubyGems

Advisory published Updated

zwkact1 is a confirmed malicious RubyGems package (MAL-2026-9855) that executes malicious code on install (malicious version 0.0.3284). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in zwkact1 (RubyGems)

MAL-2026-9855
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zwkact1

Malicious versions

1 flagged
0.0.3284

Indicators of compromise (SHA-256)

0359b8d52975f9dde1a260298efa36e26914a77839d3c124192af66c775741d3
6c82f73309e1be8949a1b2e772e7049857dd31da6f2ab897572b920bc03711c3

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for zwkact1 (version 0.0.3284).

  2. If you installed it — respond

    Remove zwkact1 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 zwkact1 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. zwkact1 on RubyGems has been identified as a malicious package (version 0.0.3284 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-04506RLUA-2026-10444

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zwkact1-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

zwkact1 (RubyGems) malicious package — MAL-2026-9855 | O3 Security