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Malicious package

zsday2811778553469RubyGems

Advisory published Updated

zsday2811778553469 is a confirmed malicious RubyGems package (MAL-2026-9787) 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 zsday2811778553469 (RubyGems)

MAL-2026-9787
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zsday2811778553469

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

901c69dd86d61a782ebece1d728d6f5a43176c8819535099b2feca8685422843
73efa6d69880a354d605b1b43636f788bf81a5bc407af7e3b9c5d243e6852f16

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for zsday2811778553469 (version 0.0.1).

  2. If you installed it — respond

    Remove zsday2811778553469 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 zsday2811778553469 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. zsday2811778553469 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-2026-04438RLUA-2026-10376

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zsday2811778553469-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

zsday2811778553469 (RubyGems) malicious package — MAL-2026-9787 | O3 Security