Which versions of silentcipherui are malicious?

Every published version of silentcipherui on npm is considered malicious. Remove the package entirely.

How do I remediate silentcipherui if I installed it?

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

If silentcipherui 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.

How do I find silentcipherui across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for silentcipherui (all published versions).

Malicious package

silentcipheruinpm

Advisory published Dec 1, 2025Updated Dec 1, 2025

silentcipherui is a confirmed malicious npm package (MAL-2025-191526) that executes malicious code on install. Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in silentcipherui (npm)

MAL-2025-191526

Immediate action

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

npm uninstall silentcipherui

What this malware does

The package silentcipherui was found to contain malicious code.

Malicious versions

all versions

Every published version of this package is considered malicious — remove it entirely.

Indicators of compromise (SHA-256)

5b78948a66f16eeb0cbe53a1285d2c02a70efb69a1185aae00bd053e2059ac4c

Detection & response playbook

Malicious package

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

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks silentcipherui-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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