Which versions of esb-core-helpers are malicious?

The following npm versions of esb-core-helpers are flagged malicious: 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4. Treat any of these as compromised.

How do I remediate esb-core-helpers if I installed it?

Remove esb-core-helpers 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 esb-core-helpers — how do I know if it already compromised me?

If esb-core-helpers 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 esb-core-helpers part of a known attack campaign?

Yes — esb-core-helpers is associated with the RLMA-2025-03182, RLUA-2026-01293 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 esb-core-helpers across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for esb-core-helpers (5 malicious versions).

Malicious package

esb-core-helpersnpm

Advisory published Jun 18, 2025Updated Mar 19, 2026

esb-core-helpers is a confirmed malicious npm package (MAL-2025-5078) that executes malicious code on install (malicious versions 1.0.0, 1.0.1, 1.0.2…). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in esb-core-helpers (npm)

MAL-2025-5078

Immediate action

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

npm uninstall esb-core-helpers

Malicious versions

5 flagged

1.0.01.0.11.0.21.0.31.0.4

Indicators of compromise (SHA-256)

648853ef884b05cacff632064b0e22c67d307d8338ece45ca8f4f1ba811e30d5

f2349d251354828d4b20047569e59e42f03e0fe40e3b538d7becb7704f35cdc8

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for esb-core-helpers (5 malicious versions).
If you installed it — respond
Remove esb-core-helpers 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 esb-core-helpers 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. esb-core-helpers on npm has been identified as a malicious package (versions 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-03182RLUA-2026-01293

References

getsafety.com

Credits

ReversingLabs · finder

Detect & block this

O3 blocks esb-core-helpers-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

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