Which versions of biandler are malicious?

The following RubyGems versions of biandler are flagged malicious: 1.0.0, 1.0.85484. Treat any of these as compromised.

How do I remediate biandler if I installed it?

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

If biandler 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 biandler part of a known attack campaign?

Yes — biandler is associated with the RLMA-2026-07251 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 biandler across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for biandler (2 malicious versions).

Malicious package

biandlerRubyGems

Advisory published Sep 22, 2026Updated Sep 24, 2026

biandler is a confirmed malicious RubyGems package (MAL-2026-16593) that executes malicious code on install (malicious versions 1.0.0, 1.0.85484). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in biandler (RubyGems)

MAL-2026-16593

Immediate action

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

gem uninstall biandler

Malicious versions

2 flagged

1.0.01.0.85484

Indicators of compromise (SHA-256)

5081bec300c4afa7f8e64b3d3f645d995dd91c2cf5433334e554aa9ec7550c2d

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for biandler (2 malicious versions).
If you installed it — respond
Remove biandler 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 biandler 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. biandler on RubyGems has been identified as a malicious package (versions 1.0.0, 1.0.85484 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-07251

Credits

ReversingLabs · finder

Detect & block this

O3 blocks biandler-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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