Which versions of zwcalx8 are malicious?

The following RubyGems versions of zwcalx8 are flagged malicious: 0.0.493. Treat any of these as compromised.

How do I remediate zwcalx8 if I installed it?

Remove zwcalx8 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 zwcalx8 — how do I know if it already compromised me?

If zwcalx8 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 zwcalx8 part of a known attack campaign?

Yes — zwcalx8 is associated with the RLMA-2026-04502, RLUA-2026-10440 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 zwcalx8 across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for zwcalx8 (version 0.0.493).

Malicious package

zwcalx8RubyGems

Advisory published Jul 7, 2026Updated Sep 24, 2026

zwcalx8 is a confirmed malicious RubyGems package (MAL-2026-9851) that executes malicious code on install (malicious version 0.0.493). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in zwcalx8 (RubyGems)

MAL-2026-9851

Immediate action

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

gem uninstall zwcalx8

Malicious versions

1 flagged

0.0.493

Indicators of compromise (SHA-256)

ef135b9088d3535b7f77c3862690c5930146086b911c48f900588d97621e4b22

1f64a311d26216bd7b6ccb2d4620bb865f86a92e84f5ed99db0738a6a2ee6fd7

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for zwcalx8 (version 0.0.493).
If you installed it — respond
Remove zwcalx8 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 zwcalx8 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. zwcalx8 on RubyGems has been identified as a malicious package (version 0.0.493 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-04502RLUA-2026-10440

References

Credits

ReversingLabs · finder

Detect & block this

O3 blocks zwcalx8-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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