Which versions of bunuler are malicious?

The following RubyGems versions of bunuler are flagged malicious: 1.0.99563. Treat any of these as compromised.

How do I remediate bunuler if I installed it?

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

If bunuler 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 bunuler part of a known attack campaign?

Yes — bunuler is associated with the RLMA-2026-07816 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 bunuler across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for bunuler (version 1.0.99563).

Malicious package

bunulerRubyGems

Advisory published Sep 22, 2026Updated Sep 24, 2026

bunuler is a confirmed malicious RubyGems package (MAL-2026-17127) that executes malicious code on install (malicious version 1.0.99563). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bunuler (RubyGems)

MAL-2026-17127

Immediate action

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

gem uninstall bunuler

Malicious versions

1 flagged

1.0.99563

Indicators of compromise (SHA-256)

1ff8240159ef2c533ce444be260e0644c07b08e345178a42c471b3a54d606ac7

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for bunuler (version 1.0.99563).
If you installed it — respond
Remove bunuler 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 bunuler 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. bunuler on RubyGems has been identified as a malicious package (version 1.0.99563 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-07816

Credits

ReversingLabs · finder

Detect & block this

O3 blocks bunuler-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

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