Malicious code in dolyame-boxy-independent-bnpl-main-banner (npm)
The npm package dolyame-boxy-independent-bnpl-main-banner contains malicious code that downloads and executes platform-specific native binaries from attacker-controlled Cloudflare Workers endpoints and DNS fallback domains. The package masquerades as a BNPL banner abstraction but performs unauthorized code execution on installation.
- Disclosed
- Last updated
- Blast radius
- Any npm consumer of dolyame-boxy-independent-bnpl-main-banner
- Ecosystems
- Attack vectors
- Affected entities
- dolyame-boxy-independent-bnpl-main-bannernpm package containing malicious code
The npm package dolyame-boxy-independent-bnpl-main-banner was found to contain malicious code that executes on load. The index.js file unconditionally requires a _bridge module that implements a multi-stage dropper.
The bridge.js module selects platform-specific payloads (Linux x64/arm64, macOS, Windows) and fetches native binaries over HTTPS from hardcoded Cloudflare *.workers.dev endpoints. The URLs are obfuscated by assembling split string arrays at runtime. Downloaded binaries are written to temporary directories (/tmp/.cache on POSIX, %TEMP%/dotnet_diag_.exe on Windows) under names impersonating benign system artifacts, then executed with elevated permissions (chmod 0755) via shell spawning (/bin/sh -c on POSIX, cmd.exe /c start /b on Windows).
A secondary dropper implementation exists in lib/telemetry.js, labeled as an "Analytics SDK," which uses base64 payload assembly and similar execution mechanisms. This code is packaged but not currently invoked from index.js.
The package also implements DNS TXT record covert-channel fallback resolution under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru domains, with discovery domains similarly obfuscated through split string arrays. The advertised purpose (BNPL banner abstraction) bears no relationship to the actual malicious functionality.
Indicators of compromise
- Packages
- dolyame-boxy-independent-bnpl-main-banner
- Domains
- sdk.dl.wel1.ru
- ext.dl.wel1.ru
- pkg.dl.wel1.ru
- net.dl.wel1.ru
Remediation
- Immediately remove dolyame-boxy-independent-bnpl-main-banner from all projects and dependencies
- Audit npm package.json and lock files for any presence of this package
- Review system logs and process execution history on any systems where this package was installed for signs of unauthorized binary execution
- Block outbound HTTPS connections to *.workers.dev domains and DNS queries to wel1.ru subdomains at the network level
- Regenerate any credentials or secrets that may have been exposed on affected systems
- Update to a patched version if available, or use an alternative package for BNPL banner functionality
Sources
- GitHub Advisory GHSA-fh2w-chmf-rp2w · GitHub Advisory Database
Cite this entry
"Malicious code in dolyame-boxy-independent-bnpl-main-banner (npm)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed August 5, 2026; last updated August 5, 2026. https://supplychainattack.org/incident/malicious-code-in-dolyame-boxy-independent-bnpl-main-banner-npm-1tdobn
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