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Malicious package

slnprobe9RubyGems

Advisory published Updated

slnprobe9 is a confirmed malicious RubyGems package (MAL-2026-8723) 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 slnprobe9 (RubyGems)

MAL-2026-8723
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall slnprobe9

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

7cba1b41442c761831c7c0ee6fe60c07e6070a2dce03be06ef3896115e371db8
098ec78e91e660718ad2efa771ecf59a0c161d980c2585ae4edff6624dff3874

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for slnprobe9 (version 0.0.1).

  2. If you installed it — respond

    Remove slnprobe9 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 slnprobe9 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. slnprobe9 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-2026-03374RLUA-2026-09272

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks slnprobe9-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

slnprobe9 (RubyGems) malicious package — MAL-2026-8723 | O3 Security