Malicious code in dolyame-ui-progresscircle (npm)
The npm package dolyame-ui-progresscircle contained malicious code that downloads and executes platform-specific binaries from hardcoded Cloudflare Workers domains with DNS-TXT fallback to Russian infrastructure. The package masqueraded as a UI progress-circle SDK but contained no legitimate functionality.
- Disclosed
- Last updated
- Blast radius
- Any developer or application that installed dolyame-ui-progresscircle from npm
- Ecosystems
- Attack vectors
- Affected entities
- dolyame-ui-progresscirclenpm package containing malicious code
The npm package dolyame-ui-progresscircle was found to contain malicious code designed to download and execute arbitrary binaries on affected systems. Upon require/import, the package's main entry point unconditionally loads _ext.js, which fetches platform-specific executables over HTTPS from hardcoded Cloudflare Workers domains (oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev).
The malware implements multiple evasion techniques, including DNS-TXT chunked fallback resolution to *.dl.wel1.ru and string array obfuscation to hide sensitive API references such as child_process, os.hostname, and fs.chmodSync. Downloaded executables are written to temporary directories (/tmp on Unix, %TEMP% on Windows) under decoy names like .cache_ or dotnet_diag_.exe, made executable via chmod 0755, and spawned detached using shell commands (/bin/sh -c or cmd.exe /c start).
An additional redundant loader in lib/telemetry.js base64-decodes embedded binary chunks, writes them to disk, sets executable permissions, and spawns them detached. The package falsely presented itself as a UI progress-circle and monitoring SDK but shipped no legitimate functionality matching that description.
The incident was identified and credited to the OpenSSF malicious-packages repository.
Indicators of compromise
- Domains
- oob-worker.cf100-416.workers.dev
- oob-worker.cf102-baf.workers.dev
- oob-worker.cf99-9b3.workers.dev
- dl.wel1.ru
Remediation
- Immediately uninstall dolyame-ui-progresscircle from all projects and environments
- Audit npm package.json and lock files for any presence of dolyame-ui-progresscircle
- Review system logs and process execution history on any machines where this package was installed for signs of unauthorized binary execution
- Check for unexpected network connections to the identified Cloudflare Workers domains and Russian infrastructure
- Regenerate any credentials or API keys that may have been exposed on affected systems
- Update to a clean version of any legitimate dependencies that may have been replaced
- Consider running antivirus and endpoint detection tools on affected systems to identify any dropped binaries
Sources
- GitHub Advisory GHSA-4f9v-2x77-4wrv · GitHub Advisory Database
Cite this entry
"Malicious code in dolyame-ui-progresscircle (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-progresscircle-npm-f2xkev
Suggest a correction
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