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Malicious package

devplatform-spa-route-treenpm

Advisory published Updated

devplatform-spa-route-tree is a confirmed malicious npm package (MAL-2026-12783) that executes malicious code on install (malicious version 35.1.3). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in devplatform-spa-route-tree (npm)

MAL-2026-12783
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall devplatform-spa-route-tree

What this malware does

On require() of devplatform-spa-route-tree, index.js loads loader.js which downloads a platform-specific binary from hostnames assembled via array-join string splits — Cloudflare Workers subdomains (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT chunked fallback under *.dl.wel1.ru. The fetched bytes are written to /tmp/.cache<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows (masquerading as.NET diagnostic tooling), chmod 0755, and spawned detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}) or the Windows cmd equivalent. Destination hostnames are split across array literals and reassembled at runtime to evade static matching, and environment-variable checks for DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK are used as cover framing. The fetched binary is opaque, unpinned, unverified, and served from non-publisher infrastructure.

Malicious versions

1 flagged
35.1.3

Indicators of compromise (SHA-256)

eabd446648c0aff2fa8f21202eeee1f46366ff6678c7811f951ff7f2413616cd

Detection & response playbook

Malicious package

  1. Find it

    Search your lockfiles and build artifacts for devplatform-spa-route-tree (version 35.1.3).

  2. If you installed it — respond

    Remove devplatform-spa-route-tree 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.

  3. Did it already run?

    If devplatform-spa-route-tree 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-spa-route-tree on npm has been identified as a malicious package (version 35.1.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-014995

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks devplatform-spa-route-tree-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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devplatform-spa-route-tree (npm) malicious package — MAL-2026-12783 | O3 Security