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Malicious package

wmwk5abRubyGems

Malicious code in wmwk5ab (RubyGems) Remove it immediately and rotate any exposed credentials.

MAL-2026-9399
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall wmwk5ab

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

05b5f2f91f53573542399f7d9158e4daf9460e1a5d3ccdb5e46dc2b3ddf548b4

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 wmwk5ab (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 wmwk5ab across your stack and pipelines.

  2. If you installed it — respond

    Remove wmwk5ab 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 wmwk5ab 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 wmwk5ab 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. wmwk5ab 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-2026-04050

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks wmwk5ab-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.

wmwk5ab (RubyGems) malicious package — MAL-2026-9399 | O3 Security