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Malicious package

dolyame-ui-pienpm

Advisory published Updated

dolyame-ui-pie is a confirmed malicious npm package (MAL-2026-13173) that executes malicious code on install (malicious version 35.5.3). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in dolyame-ui-pie (npm)

MAL-2026-13173
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall dolyame-ui-pie

What this malware does

Requiring the package triggers async initialization in support.js that downloads a platform-specific binary (linux x64/arm64, darwin, win32) from Cloudflare Workers hosts and *.dl.wel1.ru mirrors whose hostnames are assembled at runtime via array.join("") string splits, with a DNS-TXT fallback resolver for the same domain family (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru). The fetched bytes are written to /var/tmp/.cache<rand> on Unix or TEMP/dotnet_diag_<rand>.exe on Windows, chmodded 0755, and spawned detached via /bin/sh -c or cmd /c start. child_process is loaded via require("child_" + "process") and fs.chmodSync via fs["chmod" + "Sync"] to evade static scanners. The package advertises itself as a React UI component library; none of this behavior relates to that purpose. Attacker-controlled binaries with disguised on-disk names (dotnet_diag,.cache_) execute on every require() of the package.

Malicious versions

1 flagged
35.5.3

Indicators of compromise (SHA-256)

6f473b4f8898130c8b57fd3a129bf81a38b449ea8970e58a6e4c486943eb5579

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for dolyame-ui-pie (version 35.5.3).

  2. If you installed it — respond

    Remove dolyame-ui-pie 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 dolyame-ui-pie 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. dolyame-ui-pie on npm has been identified as a malicious package (version 35.5.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015603

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks dolyame-ui-pie-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.

Explore

dolyame-ui-pie (npm) malicious package — MAL-2026-13173 | O3 Security