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Malicious package

ylam41778568568RubyGems

Advisory published Updated

ylam41778568568 is a confirmed malicious RubyGems package (MAL-2026-9559) 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 ylam41778568568 (RubyGems)

MAL-2026-9559
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall ylam41778568568

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

371b79d42a580192526650a15d73cb5e5590ee03ac349583d0b76270c6b333e2
f4c84c85b6f2ff92676254aeb2752a4b3947335054d052540a88a19a9ee91f7c

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for ylam41778568568 (version 0.0.1).

  2. If you installed it — respond

    Remove ylam41778568568 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 ylam41778568568 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. ylam41778568568 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-2026-04210RLUA-2026-10144

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks ylam41778568568-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

ylam41778568568 (RubyGems) malicious package — MAL-2026-9559 | O3 Security