Which versions of devplatform-po-transformer are malicious?

The following npm versions of devplatform-po-transformer are flagged malicious: 35.1.8. Treat any of these as compromised.

How do I remediate devplatform-po-transformer if I installed it?

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

If devplatform-po-transformer 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-po-transformer part of a known attack campaign?

Yes — devplatform-po-transformer is associated with the IN-MAL-2026-015039 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-po-transformer across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for devplatform-po-transformer (version 35.1.8).

Malicious package

devplatform-po-transformernpm

Advisory published Aug 5, 2026Updated Aug 5, 2026

devplatform-po-transformer is a confirmed malicious npm package (MAL-2026-12733) that executes malicious code on install (malicious version 35.1.8). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in devplatform-po-transformer (npm)

MAL-2026-12733

Immediate action

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

npm uninstall devplatform-po-transformer

What this malware does

On require of the package, platform.js detects OS/arch and downloads an opaque binary from Cloudflare Workers hostnames assembled at runtime from split-string arrays (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS-TXT covert-channel fallback under *.dl.wel1.ru that reassembles base64 chunks from N.<domain> TXT records. The fetched bytes are written to /tmp/.cache<rand> on Unix or %TEMP%\dotnet_diag_<rand>.exe on Windows under deceptive filenames, chmod 0755, and spawned detached and unref'd via /bin/sh -c or cmd.exe /c start /b so the child survives the Node parent. There is no hash or signature verification; the download hosts are unrelated to the package publisher; a TTL marker at /tmp/.analytics_state suppresses re-execution within ~21000s. The fetch-decode-execute chain fires on import of the package's main entry, giving the operator of the remote endpoints arbitrary persistent code execution on the installer's host.

Malicious versions

1 flagged

35.1.8

Indicators of compromise (SHA-256)

555faac3cf4078b125af0858613813fb3f3bc780a573ddc5713b23d1046c9c71

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for devplatform-po-transformer (version 35.1.8).
If you installed it — respond
Remove devplatform-po-transformer 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-po-transformer 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-po-transformer on npm has been identified as a malicious package (version 35.1.8 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015039

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks devplatform-po-transformer-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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