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Malicious package

zwkact2RubyGems

Advisory published Updated

zwkact2 is a confirmed malicious RubyGems package (MAL-2026-9856) that executes malicious code on install (malicious version 0.0.3286). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in zwkact2 (RubyGems)

MAL-2026-9856
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zwkact2

Malicious versions

1 flagged
0.0.3286

Indicators of compromise (SHA-256)

8f55b3f5627cc42aea91e46f52a787b4cf547febefb14f448247306771baa2f0
b85e0d7e941b7b1b568fa2c423825bbd2a37646c5f06587092a0b77cd2da88f1

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for zwkact2 (version 0.0.3286).

  2. If you installed it — respond

    Remove zwkact2 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 zwkact2 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. zwkact2 on RubyGems has been identified as a malicious package (version 0.0.3286 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-04507RLUA-2026-10445

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zwkact2-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

zwkact2 (RubyGems) malicious package — MAL-2026-9856 | O3 Security