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Malicious package

oaicx3857133RubyGems

Advisory published Updated

oaicx3857133 is a confirmed malicious RubyGems package (MAL-2026-8161) 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 oaicx3857133 (RubyGems)

MAL-2026-8161
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall oaicx3857133

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

8bbc1ab75d518954db9bedd362ae94695fc676f751221bac4edb19565952c1fd
598ed268d1dc3809bdae7b078503304b84fc877a158655a4af8a6a66091825ee

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for oaicx3857133 (version 0.0.1).

  2. If you installed it — respond

    Remove oaicx3857133 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 oaicx3857133 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. oaicx3857133 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-2026-02812RLUA-2026-08676

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks oaicx3857133-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

oaicx3857133 (RubyGems) malicious package — MAL-2026-8161 | O3 Security