Which versions of logstash_codec-avro are malicious?

The following RubyGems versions of logstash_codec-avro are flagged malicious: 2.0.4. Treat any of these as compromised.

How do I remediate logstash_codec-avro if I installed it?

Remove logstash_codec-avro 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-avro — how do I know if it already compromised me?

If logstash_codec-avro 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-avro part of a known attack campaign?

Yes — logstash_codec-avro is associated with the RLMA-2024-05789, RLUA-2024-10309, RLUA-2026-08519 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-avro across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for logstash_codec-avro (version 2.0.4).

Malicious package

logstash_codec-avroRubyGems

Advisory published Jun 25, 2024Updated Sep 24, 2026

logstash_codec-avro is a confirmed malicious RubyGems package (MAL-2024-6983) that executes malicious code on install (malicious version 2.0.4). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in logstash_codec-avro (RubyGems)

MAL-2024-6983

Immediate action

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

gem uninstall logstash_codec-avro

Malicious versions

1 flagged

2.0.4

Indicators of compromise (SHA-256)

6de3645e63a1f2dbf45e88947ecd5ac9b98b51ea0aa2895828ce0fb164daaa2c

4af58fb3d71ec7a33011bfc9669492c770c41945236ec2e4695987a9750ac436

71421dcc203de7bd24bd4af073fc904c5401d8b0b0dcad0a19ae5d111a59e437

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for logstash_codec-avro (version 2.0.4).
If you installed it — respond
Remove logstash_codec-avro 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-avro 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-avro on RubyGems has been identified as a malicious package (version 2.0.4 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2024-05789RLUA-2024-10309RLUA-2026-08519

References

Credits

ReversingLabs · finder

Detect & block this

O3 blocks logstash_codec-avro-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