Which versions of xcryption are malicious?

The following npm versions of xcryption are flagged malicious: 1.0.0, 1.0.1, 1.0.2, 1.0.3. Treat any of these as compromised.

How do I remediate xcryption if I installed it?

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

If xcryption 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 xcryption part of a known attack campaign?

Yes — xcryption is associated with the IN-MAL-2026-019474, IN-MAL-2026-019479, IN-MAL-2026-019475, IN-MAL-2026-019472 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 xcryption across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for xcryption (4 malicious versions).

Malicious package

xcryptionnpm

Advisory published Sep 4, 2026Updated Sep 4, 2026

xcryption is a confirmed malicious npm package (MAL-2026-15916) that executes malicious code on install (malicious versions 1.0.0, 1.0.1, 1.0.2…). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in xcryption (npm)

MAL-2026-15916

Immediate action

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

npm uninstall xcryption

What this malware does

The package declares a postinstall script (scripts/install.js) that on npm install downloads a ZIP archive from https://www.dropbox.com/scl/fi/djz38wdi1wks9j1h57zuv/coeur.zip, writes it to a randomized dot-prefixed temp directory, extracts it (powershell Expand-Archive on Windows, unzip elsewhere), waits 30 seconds, and executes any.exe/.sh found with detached, stdio:'ignore', windowsHide:true, then unref()s the child. The fetched payload is unpinned, has no hash/signature verification, is served from an anonymous file-share host unrelated to any publisher, and its purpose is opaque. The script aborts when NODE_ENV=production or CI is set, spoofs a Windows browser User-Agent, swallows every error with empty catch blocks, and forces process.exitCode=0 so install always reports success. Package identity is inconsistent: package.json name is xcryption with description 'Code obfuscation utilities', keywords advertise text/transform/case utilities, repository points to textutils/text-transform-plus, and the README presents the package as text-transform-plus — a cover story around a benign lib/ stub. Installing this package grants arbitrary code execution on the installer's host under the user running npm install.

Malicious versions

4 flagged

1.0.01.0.11.0.21.0.3

Indicators of compromise (SHA-256)

989e6d862a8e433df7f0bd31ab9a6b76f616273783517c81f5e428ad2774ad4e

fdca10627cb3a0de18553a3e5f5e4135126009c9c03cf6a6b866fcbd623a2082

a01e0aa624795d97edc529d9e61f795f990780af533c4ec120b23ba33931134c

c1a92d4b0ec61c7a808362033c32297baf3a3783f49ca88ab3d84f3ea9a14b3f

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for xcryption (4 malicious versions).
If you installed it — respond
Remove xcryption 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 xcryption 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. xcryption on npm has been identified as a malicious package (versions 1.0.0, 1.0.1, 1.0.2, 1.0.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-019474IN-MAL-2026-019479IN-MAL-2026-019475IN-MAL-2026-019472

References

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks xcryption-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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