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Malicious package

wmj169905RubyGems

Advisory published Updated

wmj169905 is a confirmed malicious RubyGems package (MAL-2026-9380) 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 wmj169905 (RubyGems)

MAL-2026-9380
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall wmj169905

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

04a231f40af96dd3903b7a774f974b2664441de60967662bdb66f16792b08b27
b9929f8818a64ccbb52acd912542e8313b0af22211dadd358ef51bba412c14a8

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for wmj169905 (version 0.0.1).

  2. If you installed it — respond

    Remove wmj169905 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 wmj169905 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. wmj169905 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-2026-04031RLUA-2026-09961

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks wmj169905-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

wmj169905 (RubyGems) malicious package — MAL-2026-9380 | O3 Security