Which versions of devplatform-spa-di are malicious?

The following npm versions of devplatform-spa-di are flagged malicious: 35.5.8. Treat any of these as compromised.

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

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

If devplatform-spa-di was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

Is devplatform-spa-di part of a known attack campaign?

Yes — devplatform-spa-di is associated with the IN-MAL-2026-015013 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-spa-di across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for devplatform-spa-di (version 35.5.8). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging devplatform-spa-di across your stack and pipelines.

Malicious package

devplatform-spa-dinpm

devplatform-spa-di is a confirmed malicious npm package (MAL-2026-12757) that executes malicious code on install (malicious version 35.5.8). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in devplatform-spa-di (npm)

MAL-2026-12757

Immediate action

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

npm uninstall devplatform-spa-di

What this malware does

On require('devplatform-spa-di'), index.js loads polyfill.js which fetches a platform-specific native binary from hardcoded Cloudflare Workers subdomains (oob-worker.cf100-416.workers.dev, cf99-9b3.workers.dev, cf101-adf.workers.dev, cf102-baf.workers.dev), with a DNS-TXT base64 fallback resolving through sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The fetched bytes are written to /tmp/.cache<rand> on POSIX or %TEMP%\dotnet_diag_<rand>.exe on Windows, chmod 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b. Host strings and DNS domains are reconstructed at runtime by joining split array fragments (e.g. ["oob-worker.cf100-416.worke","rs.dev"].join("")) and cover-story comments frame the dropper as telemetry, with DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK env-var gates and an EXPIRE_SEC mtime stamp implementing dormancy and once-per-host gating. No hash or signature verification is performed. The package's advertised purpose is a small SPA dependency-injection helper, unrelated to native binary execution.

Malicious versions

1 flagged

35.5.8

Indicators of compromise (SHA-256)

0b547ced93ce179bd009fd7e88e23e19ba63fdb224d9b32c62588f05a3fd40f5

Detection & response playbook

Malicious package

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for devplatform-spa-di (version 35.5.8). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging devplatform-spa-di across your stack and pipelines.
If you installed it — respond
Remove devplatform-spa-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-spa-di was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks devplatform-spa-di before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. devplatform-spa-di on npm has been identified as a malicious package (version 35.5.8 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015013

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks devplatform-spa-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

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