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Malicious package

zwkact4RubyGems

Malicious code in zwkact4 (RubyGems) Remove it immediately and rotate any exposed credentials.

MAL-2026-9858
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zwkact4

Malicious versions

1 flagged
0.0.3289

Indicators of compromise (SHA-256)

321b054518c294894c8b90aa7ad39b9cc0e56592d255f43d57c98e3102fe8e15

Detection & response playbook

Malicious package
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for zwkact4 (version 0.0.3289). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging zwkact4 across your stack and pipelines.

  2. If you installed it — respond

    Remove zwkact4 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 zwkact4 was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks zwkact4 before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. zwkact4 on RubyGems has been identified as a malicious package (version 0.0.3289 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-04509

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zwkact4-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.

zwkact4 (RubyGems) malicious package — MAL-2026-9858 | O3 Security