Which versions of devplatform-vite-plugin-external are malicious?

The following npm versions of devplatform-vite-plugin-external are flagged malicious: 35.3.6. Treat any of these as compromised.

How do I remediate devplatform-vite-plugin-external if I installed it?

devplatform-vite-plugin-external is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed devplatform-vite-plugin-external — how do I know if it already compromised me?

If devplatform-vite-plugin-external 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-vite-plugin-external part of a known attack campaign?

Yes — devplatform-vite-plugin-external is associated with the IN-MAL-2026-015724 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-vite-plugin-external 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-vite-plugin-external (version 35.3.6). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging devplatform-vite-plugin-external across your stack and pipelines.

Malicious package

devplatform-vite-plugin-externalnpm

devplatform-vite-plugin-external is a confirmed malicious npm package (MAL-2026-13272) that steals credentials and exfiltrates sensitive data (malicious version 35.3.6). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in devplatform-vite-plugin-external (npm)

MAL-2026-13272

Immediate action

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

npm uninstall devplatform-vite-plugin-external

What this malware does

The package's main entry (index.js) unconditionally requires./setup on load. setup.js selects an OS/arch-specific endpoint and downloads a binary from a rotating list of Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev) whose hostnames are assembled via array-join string splitting to evade static analysis, with a DNS-TXT chunked fallback across sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The fetched bytes are written to a temp path under a disguised name ('dotnet_diag_<tag>.exe' on Windows or '.cache_<tag>' on POSIX), chmod 0755, and spawned detached via cmd.exe /c start /b or /bin/sh -c "fp &". There is no hash or signature verification of the downloaded payload; the source hosts are attacker-controlled infrastructure unrelated to the package's stated Vite-plugin purpose. Execution is suppressed by DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK environment variables and cached via a marker file with a ~21329s TTL, framing the behavior as telemetry while dropping and running an opaque binary. Any consumer that requires or imports this package triggers full-host code execution under attacker control.

Malicious versions

1 flagged

35.3.6

Indicators of compromise (SHA-256)

7a591855b5f44a53d20e6258728aeb5c0254fb10dac285f579fffcfc97608061

Detection & response playbook

Credential / info stealer

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for devplatform-vite-plugin-external (version 35.3.6). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging devplatform-vite-plugin-external across your stack and pipelines.
If you installed it — respond
devplatform-vite-plugin-external is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If devplatform-vite-plugin-external 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-vite-plugin-external 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-vite-plugin-external on npm has been identified as a malicious package (version 35.3.6 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015724

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks devplatform-vite-plugin-external-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

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