The ded-pwa-c-cms npm package (version 35.9.9) includes code in its index.js that loads a platform-specific script to download a binary payload over HTTPS from obfuscated Cloudflare Workers and other suspicious subdomains. The payload is reconstructed using a DNS-TXT fallback channel and saved to temporary locations on Unix or Windows systems with executable permissions. It is then spawned as a detached process, bypassing normal telemetry by checking environment variables such as DISABLE_TELEMETRY. The binary filename mimics a Microsoft diagnostic tool (dotnet_diag) to avoid suspicion. No hash or signature verification is performed on the downloaded payload, allowing arbitrary code execution controlled by the package author.

This malicious package enables remote code execution on systems that install ded-pwa-c-cms version 35.9.9 by downloading and executing an unverified binary payload. The payload runs detached from the main process and can evade telemetry detection, potentially allowing attackers to maintain persistence, execute arbitrary commands, or perform other malicious activities under the guise of a legitimate tool.

No official patch or remediation is currently documented. Users should immediately stop using ded-pwa-c-cms version 35.9.9 and remove it from their environments. Avoid installing or running this package until a trusted, verified version is released. Monitor for any unusual processes named similarly to Microsoft diagnostic tools and restrict execution of untrusted binaries from temporary directories. Check vendor advisories or trusted security sources for updates on remediation.