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Malicious package

zwcalx0RubyGems

Malicious code in zwcalx0 (RubyGems) Remove it immediately and rotate any exposed credentials.

MAL-2026-9839
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zwcalx0

Malicious versions

1 flagged
0.0.483

Indicators of compromise (SHA-256)

2234055b499764c181d21c96f2b901819de770eaefbeb709fd16a8f778ad8fb2

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 zwcalx0 (version 0.0.483). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging zwcalx0 across your stack and pipelines.

  2. If you installed it — respond

    Remove zwcalx0 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 zwcalx0 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 zwcalx0 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. zwcalx0 on RubyGems has been identified as a malicious package (version 0.0.483 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-04490

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zwcalx0-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.

zwcalx0 (RubyGems) malicious package — MAL-2026-9839 | O3 Security