Which versions of logstash-codec-bulk-es are malicious?

The following RubyGems versions of logstash-codec-bulk-es are flagged malicious: 0.1.4. Treat any of these as compromised.

How do I remediate logstash-codec-bulk-es if I installed it?

Remove logstash-codec-bulk-es 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.

I already installed logstash-codec-bulk-es — how do I know if it already compromised me?

If logstash-codec-bulk-es 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.

Is logstash-codec-bulk-es part of a known attack campaign?

Yes — logstash-codec-bulk-es is associated with the RLMA-2024-05787, RLUA-2024-10307, RLUA-2026-08517 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find logstash-codec-bulk-es across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for logstash-codec-bulk-es (version 0.1.4).

Malicious package

logstash-codec-bulk-esRubyGems

Advisory published Jun 25, 2024Updated Sep 24, 2026

logstash-codec-bulk-es is a confirmed malicious RubyGems package (MAL-2024-6981) that executes malicious code on install (malicious version 0.1.4). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in logstash-codec-bulk-es (RubyGems)

MAL-2024-6981

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

gem uninstall logstash-codec-bulk-es

Malicious versions

1 flagged

0.1.4

Indicators of compromise (SHA-256)

fd26e39b0bbb58071286fcbe16091714594e192a12188e2b312846cd21794ef3

9d82bc52495a9574eac9cd66dc94283c551ad32aa238cb72b1dd216d77f08ddf

706a8ab3ec62c908b2a020d680adf303246d0f5d30e552571192c68c3d19af9b

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for logstash-codec-bulk-es (version 0.1.4).
If you installed it — respond
Remove logstash-codec-bulk-es 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.
Did it already run?
If logstash-codec-bulk-es 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. logstash-codec-bulk-es on RubyGems has been identified as a malicious package (version 0.1.4 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2024-05787RLUA-2024-10307RLUA-2026-08517

References

Credits

ReversingLabs · finder

Detect & block this

O3 blocks logstash-codec-bulk-es-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.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database