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Malicious package

probejiqptzcoRubyGems

Advisory published Updated

probejiqptzco is a confirmed malicious RubyGems package (MAL-2026-8427) that executes malicious code on install (malicious versions 0.0.1, 0.0.2, 0.0.3…). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in probejiqptzco (RubyGems)

MAL-2026-8427
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall probejiqptzco

Malicious versions

6 flagged
0.0.10.0.20.0.30.0.40.0.50.0.6

Indicators of compromise (SHA-256)

c7f62661511cbea482b8c60a9510112dc6b7e92b3d3f801f73cbcefce6731b80
db674bc1f54b4f1cab74a4780abd6e0ef417f71780b746b85f7c197fbda40577

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for probejiqptzco (6 malicious versions).

  2. If you installed it — respond

    Remove probejiqptzco 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 probejiqptzco 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. probejiqptzco on RubyGems has been identified as a malicious package (versions 0.0.1, 0.0.2, 0.0.3, 0.0.4, 0.0.5, 0.0.6 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-03078RLUA-2026-08951

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks probejiqptzco-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

probejiqptzco (RubyGems) malicious package — MAL-2026-8427 | O3 Security