Which versions of @microsop/apple-mycelium-integrity-check are malicious?

The following npm versions of @microsop/apple-mycelium-integrity-check are flagged malicious: 1.0.1778331373. Treat any of these as compromised.

How do I remediate @microsop/apple-mycelium-integrity-check if I installed it?

Remove @microsop/apple-mycelium-integrity-check 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 @microsop/apple-mycelium-integrity-check — how do I know if it already compromised me?

If @microsop/apple-mycelium-integrity-check 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 @microsop/apple-mycelium-integrity-check part of a known attack campaign?

Yes — @microsop/apple-mycelium-integrity-check is associated with the RLMA-2026-04760, RLUA-2026-05888 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 @microsop/apple-mycelium-integrity-check across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for @microsop/apple-mycelium-integrity-check (version 1.0.1778331373).

Malicious package

@microsop/apple-mycelium-integrity-checknpm

Advisory published Jul 7, 2026Updated Sep 1, 2026

@microsop/apple-mycelium-integrity-check is a confirmed malicious npm package (MAL-2026-7085) that executes malicious code on install (malicious version 1.0.1778331373). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @microsop/apple-mycelium-integrity-check (npm)

MAL-2026-7085

Immediate action

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

npm uninstall @microsop/apple-mycelium-integrity-check

Malicious versions

1 flagged

1.0.1778331373

Indicators of compromise (SHA-256)

34b0cfb00724164e8ff49fd5e889fbf4b7088165bedcc4c46223b83753f82ebf

d134f02bbbc60fe382df257cf3f3d5517b1df3f26794bc599f638a73631df26c

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for @microsop/apple-mycelium-integrity-check (version 1.0.1778331373).
If you installed it — respond
Remove @microsop/apple-mycelium-integrity-check 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 @microsop/apple-mycelium-integrity-check 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. @microsop/apple-mycelium-integrity-check on npm has been identified as a malicious package (version 1.0.1778331373 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-04760RLUA-2026-05888

References

github.com

Credits

ReversingLabs · finder

Detect & block this

O3 blocks @microsop/apple-mycelium-integrity-check-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