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Malicious package

slnproxy478404RubyGems

Advisory published Updated

slnproxy478404 is a confirmed malicious RubyGems package (MAL-2026-8727) 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 slnproxy478404 (RubyGems)

MAL-2026-8727
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall slnproxy478404

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

abac4c4a6fbd194b9ef4fcf91fd1b87451c5e539dfe19bf25e79c82c4bd77fd0
ccd9c96f01695c7ba4c05757df8825d0e1aaa3eb8255485d74de952c74f43b43

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for slnproxy478404 (version 0.0.1).

  2. If you installed it — respond

    Remove slnproxy478404 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 slnproxy478404 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. slnproxy478404 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-2026-03378RLUA-2026-09276

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks slnproxy478404-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

slnproxy478404 (RubyGems) malicious package — MAL-2026-8727 | O3 Security