Malicious code in dolyame-ui-inputdate (npm)
The npm package dolyame-ui-inputdate contains malicious code that downloads and executes platform-specific binaries from remote Cloudflare Workers endpoints and DNS covert channels on module import. The package masquerades as an API client wrapper but performs unauthorized code execution.
- Disclosed
- Last updated
- Blast radius
- All npm consumers of dolyame-ui-inputdate
- Ecosystems
- Attack vectors
- Affected entities
- dolyame-ui-inputdatenpm package containing malicious code
The npm package dolyame-ui-inputdate was found to contain malicious code that executes on require()/import. The package's index.js loads a hidden module (_ext.js) that selects platform-specific remote endpoints and downloads opaque binaries via HTTPS from obfuscated Cloudflare Workers hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev).
The malicious code implements multiple evasion techniques, including a base64-over-DNS-TXT fallback channel using domains sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. Downloaded binaries are written to hidden temporary files (.cache_ / dotnet_diag_ .exe), made executable (chmod 0755), and spawned detached via shell commands (/bin/sh -c or cmd).
The package's stated purpose as an 'API client wrapper' does not correspond to any of this behavior, indicating deliberate deception. The incident was identified by the OpenSSF malicious-packages project and reported via GitHub Security Advisory GHSA-5g2j-hj85-vphj.
Indicators of compromise
- Packages
- dolyame-ui-inputdate
- Domains
- oob-worker.cf103-070.workers.dev
- oob-worker.cf101-adf.workers.dev
- oob-worker.cf102-baf.workers.dev
- sdk.dl.wel1.ru
- ext.dl.wel1.ru
- pkg.dl.wel1.ru
- net.dl.wel1.ru
Remediation
- Immediately remove dolyame-ui-inputdate from all projects and dependencies
- Audit npm package.json and lock files for any presence of dolyame-ui-inputdate
- Review system logs and network traffic for connections to the identified Cloudflare Workers hosts and wel1.ru domains
- Scan systems that installed this package for unauthorized binaries in temporary directories (.cache_, dotnet_diag_)
- Update to a safe alternative package or implement required functionality directly
- Consider using npm audit and supply chain security tools to detect similar malicious packages
Sources
- GitHub Advisory GHSA-5g2j-hj85-vphj · GitHub Advisory Database
Cite this entry
"Malicious code in dolyame-ui-inputdate (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-inputdate-npm-18czl7
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