Which versions of devplatform-di are malicious?

The following npm versions of devplatform-di are flagged malicious: 35.5.5. Treat any of these as compromised.

How do I remediate devplatform-di if I installed it?

Remove devplatform-di 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 devplatform-di — how do I know if it already compromised me?

If devplatform-di 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 devplatform-di part of a known attack campaign?

Yes — devplatform-di is associated with the IN-MAL-2026-015066 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 devplatform-di across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for devplatform-di (version 35.5.5).

Malicious package

devplatform-dinpm

Advisory published Aug 5, 2026Updated Aug 5, 2026

devplatform-di is a confirmed malicious npm package (MAL-2026-12709) that executes malicious code on install (malicious version 35.5.5). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in devplatform-di (npm)

MAL-2026-12709

Immediate action

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

npm uninstall devplatform-di

What this malware does

On require('devplatform-di'), index.js loads compat.js which fetches a platform-specific executable from string-split-obfuscated hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev), with a base64-chunk DNS TXT fallback across sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The downloaded bytes are written to /tmp or %TEMP% under cover-story filenames such as dotnet_diag<rnd>.exe and.cache_<rnd>, chmod 0755'd, and spawned detached via /bin/sh -c or cmd.exe. Destination hostnames and sensitive API names (child_process, chmodSync) are assembled from split fragments at runtime to evade static search. lib/telemetry.js contains the same shape (require("child_"+"process"), base64-decoded buffer, spawn /bin/sh, chmodSync 0755). The package presents itself as a trivial dependency-injection stub, unrelated to any legitimate native-binary requirement.

Malicious versions

1 flagged

35.5.5

Indicators of compromise (SHA-256)

e3fd866e9abd20e9fa0c9ca40131d13b1ca98e2abbe73f53fd063581a65256d9

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for devplatform-di (version 35.5.5).
If you installed it — respond
Remove devplatform-di 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 devplatform-di 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. devplatform-di on npm has been identified as a malicious package (version 35.5.5 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015066

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks devplatform-di-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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