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Malicious package

zjenc82c4d3RubyGems

Advisory published Updated

zjenc82c4d3 is a confirmed malicious RubyGems package (MAL-2026-9584) 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 zjenc82c4d3 (RubyGems)

MAL-2026-9584
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall zjenc82c4d3

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

50a915c19f5e73d14065f0468ab18a6bdcbe9eb9073d7a5db5faf30d2633da18
c0db9fe738a96456adc02d7d7171a90f3c62eb96f1344d873c9bb266672438bd

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for zjenc82c4d3 (version 0.0.1).

  2. If you installed it — respond

    Remove zjenc82c4d3 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 zjenc82c4d3 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. zjenc82c4d3 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-2026-04235RLUA-2026-10172

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks zjenc82c4d3-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

zjenc82c4d3 (RubyGems) malicious package — MAL-2026-9584 | O3 Security