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Malicious package

zwtcook2RubyGems

Malicious code in zwtcook2 (RubyGems) Remove it immediately and rotate any exposed credentials.

MAL-2026-9899
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zwtcook2

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

e4571acf7b26105ae8d097fce9e8af8cf84f90e8b4983997c5d072b93b4377db

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 zwtcook2 (version 0.0.1). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging zwtcook2 across your stack and pipelines.

  2. If you installed it — respond

    Remove zwtcook2 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 zwtcook2 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 zwtcook2 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. zwtcook2 on RubyGems has been identified as a malicious package (version 0.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-04550

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zwtcook2-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.

zwtcook2 (RubyGems) malicious package — MAL-2026-9899 | O3 Security