MAL-2026-12390 Malicious code in hubert-document-actual-insurance-rules-am (npm)

On require of the package, index.js loads helpers.js which downloads a platform-specific executable from a rotating list of Cloudflare Workers hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT fallback under *.dl.well1.site. The hostnames are assembled at runtime by splitting and joining string fragments to hide them from static analysis. The fetched binary is written to a disguised path in /tmp or %TEMP% (e.g. dotnet_diag<hex>.exe or.cache_<hex>), chmodded 0o755 on POSIX, and spawned detached via /bin/sh -c or cmd. Cover-story identifiers such as analytics_state, DISABLE_TELEMETRY, and dotnet_diag_ frame the behavior as telemetry, but the actual code path is a fetch-and-execute dropper of attacker-controlled binaries that fires on module load.

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.