Malicious code in dolyame-ui-deprecatepropshoc (npm)
dolyame-ui-deprecatepropshoc@35.8.1 (npm) contained malicious code that executed remote code on installation via side-effect loading of _adapter.js and lib/telemetry.js. The dropper fetched platform-specific binaries from Cloudflare Workers infrastructure and executed them with elevated privileges.
- Disclosed
- Last updated
- Blast radius
- Any developer or system that installed dolyame-ui-deprecatepropshoc@35.8.1 and required the module would execute the malicious payload at require() time.
- Ecosystems
- Attack vectors
- Affected entities
- dolyame-ui-deprecatepropshoc · 35.8.1
dolyame-ui-deprecatepropshoc@35.8.1 on npm contained embedded malicious code that triggered on require(). The package side-effect-loaded _adapter.js and lib/telemetry.js modules, which assembled Cloudflare Workers hostnames from fragmented strings and used DNS-TXT chunked-base64 fallback via *.dl.wel1.ru to fetch platform-specific binaries (/pkg/package, /pkg/loader_mac, /pkg/package.exe).
The fetched executables were written to /var/tmp/.cache_ (Linux/macOS) or %TEMP%\dotnet_diag_.exe (Windows), made executable via fs.chmodSync with mode 0755, and spawned detached through shell commands (/bin/sh -c or cmd.exe /c start /b). The child_process module was loaded via string concatenation (require('child_'+'process')) to evade static analysis.
The malicious code was duplicated in lib/telemetry.js, ensuring payload execution even if adapter.js was removed. No version pinning, hash verification, or signature validation was performed on the fetched binaries. The naming scheme ('telemetry', 'analytics_state', 'dotnet_diag') was used as a cover story for the remote code execution behavior.
The incident was identified by the OpenSSF malicious-packages project and credited to Amazon Inspector.
Indicators of compromise
- Packages
- dolyame-ui-deprecatepropshoc
- Domains
- oob-worker.cf101-adf.workers.dev
- *.dl.wel1.ru
Remediation
- Review the linked advisory; remove or upgrade the affected component and rotate any exposed credentials.
Sources
- GitHub Advisory GHSA-3hjw-3h35-wcx3 · GitHub Advisory Database
Cite this entry
"Malicious code in dolyame-ui-deprecatepropshoc (npm)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed August 7, 2026; last updated August 7, 2026. https://supplychainattack.org/incident/malicious-code-in-dolyame-ui-deprecatepropshoc-npm-z5nv21
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