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Malicious package

wn5ielist2aRubyGems

Advisory published Updated

wn5ielist2a is a confirmed malicious RubyGems package (MAL-2026-9409) that executes malicious code on install (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in wn5ielist2a (RubyGems)

MAL-2026-9409
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall wn5ielist2a

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

0a78f4b7ca88bfba54c1f7ebb96c3d07408ad57cbb9b8e83d5c39e988e697c8e
2f760f7875f8a6a9c756ffb7bf81137269e6a66bfeff4ff7300263b7b149d37f

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for wn5ielist2a (version 0.0.1).

  2. If you installed it — respond

    Remove wn5ielist2a 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 wn5ielist2a 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. wn5ielist2a 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-2026-04060RLUA-2026-09990

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks wn5ielist2a-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

wn5ielist2a (RubyGems) malicious package — MAL-2026-9409 | O3 Security