dolyame-ui-tabslayoutnpm
Advisory published Updated
dolyame-ui-tabslayout is a confirmed malicious npm package (MAL-2026-13602) that executes malicious code on install (malicious version 35.8.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in dolyame-ui-tabslayout (npm)
What this malware does
On require of the package, index.js loads lib/telemetry.js and polyfill.js, both of which contain dropper logic that selects an OS-specific path, fetches a binary from one of three obfuscated Cloudflare Workers URLs (oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev), with a base64-over-DNS-TXT fallback from *.dl.wel1.ru, writes the payload to a temp path under cover names such as dotnet_diag.exe or.cache_, chmods it 0755, and spawns it detached via /bin/sh -c or cmd. Destination hostnames and dangerous API references are assembled at runtime by string-splitting concatenation (e.g. ['oob-worker.cf102-baf','.worke','rs.dev'].join(''), require('child_' + 'process'), fs['chmod'+'Sync']) to evade static scanners. The package presents itself as build/deployment tooling and wraps the dropper inside a fake Sentry-style analytics SDK.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for dolyame-ui-tabslayout (version 35.8.1).
If you installed it — respond
Remove dolyame-ui-tabslayout 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 dolyame-ui-tabslayout 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
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks dolyame-ui-tabslayout-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.