OpenSSF/OSV advisory MAL-2026-12049 confirms this npm version as malicious. On require of the package, _platform.js downloads a platform-specific native binary from hardcoded Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT fallback resolved via *.dl.well1.site, writes the bytes to a masqueraded cache path (cover-story names such as...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in tinkoff-component-infopanel (npm)
Details
On require of the package, _platform.js downloads a platform-specific native binary from hardcoded Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT fallback resolved via *.dl.well1.site, writes the bytes to a masqueraded cache path (cover-story names such as dotnet_diag_,.cache_,.analytics_state), chmods 0o755, and spawns it detached via /bin/sh -c or cmd. The destination hostnames are assembled at runtime by joining string fragments (e.g. ["oob-worker.cf10","0-416",".wo","rker","s.dev"].join("")) to evade static matching. No hash or signature verification is performed. The package name impersonates the Tinkoff brand while package.json declares an empty author, no repository, and a README labeling it an 'internal' module. The dropper fires via top-level require() from index.js, so importing this package as a dependency executes the fetched binary on the installer's host.
Decision reason
OpenSSF Malicious Packages via OSV confirms tinkoff-component-infopanel@20.8.3 as malicious (MAL-2026-12049): Malicious code in tinkoff-component-infopanel (npm)