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Malicious package

hackfossil1778554817RubyGems

Advisory published Updated

hackfossil1778554817 is a confirmed malicious RubyGems package (MAL-2026-7729) 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 hackfossil1778554817 (RubyGems)

MAL-2026-7729
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall hackfossil1778554817

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

dfc1a8caf522f58d3af34748727f3833770f924c805c61b3e0673f2aa75f5a3f
2ce47edbd14d4fca9b87356e5411a760f204860270e27aa79484efbcf2df5d7b

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for hackfossil1778554817 (version 0.0.1).

  2. If you installed it — respond

    Remove hackfossil1778554817 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 hackfossil1778554817 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. hackfossil1778554817 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-2026-02380RLUA-2026-08172

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks hackfossil1778554817-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

hackfossil1778554817 (RubyGems) malicious package — MAL-2026-7729 | O3 Security