MAL-2026-12375 Malicious code in evo-web-base-analytics-data (npm)

On require, index.js auto-loads support.js which reassembles download hosts at runtime from string fragments (e.g. Cloudflare Workers subdomains under workers.dev and *.dl.well1.site), fetches a platform-specific binary over HTTPS with a DNS-TXT base64 fallback channel, writes it to /tmp or the Windows Temp directory under disguised names (.cache<hex>, dotnet_diag_<hex>.exe), chmods it to 0755, and spawns it detached via /bin/sh -c or cmd.exe. The download host literals are split and joined via Array.join('') to defeat static inspection. The DNS-TXT fallback queries c.<domain> and numbered subdomains and base64-decodes concatenated TXT records into an executable payload, providing a covert transport that bypasses HTTP egress filtering.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.