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Malicious package

lbrssyrofhwlcoRubyGems

Advisory published Updated

lbrssyrofhwlco is a confirmed malicious RubyGems package (MAL-2026-7957) 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 lbrssyrofhwlco (RubyGems)

MAL-2026-7957
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall lbrssyrofhwlco

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

1661cab9ac7730631d2d144f5cc8243dce6ea0ee0288ff89c5129bc34a09a32a
e40057383af6d1983abb0b24cd3fe048d96fe269c0413742ed312b7d8b1d6115

Detection & response playbook

Malicious package
  1. Find it

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

  2. If you installed it — respond

    Remove lbrssyrofhwlco 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 lbrssyrofhwlco 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. lbrssyrofhwlco 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-2026-02608RLUA-2026-08425

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks lbrssyrofhwlco-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

lbrssyrofhwlco (RubyGems) malicious package — MAL-2026-7957 | O3 Security