eacq-acq-menu-core@35.9.7
Malicious code in eacq-acq-menu-core (npm)
Analysis
eacq-acq-menu-core@35.9.7 is a multi-stage binary dropper. On require, index.js loads _helpers.js, which fingerprints the platform/arch and downloads a platform-specific payload from Cloudflare Workers endpoints (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe). If HTTPS download fails it falls back to a DNS-TXT base64 channel under *.dl[.]wel1[.]ru (c[.]sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru). The fetched binary is written to /tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in TEMP on Windows), chmod 755, and executed detached via /bin/sh -c or cmd.exe /c start /b, so it outlives the parent process. A stamp file (.analytics_state / analytics_state) throttles re-downloads.
- analyzed by
- Leitwacht
- first seen
- Aug 5, 2026, 02:58 PM
- analyzed
- Aug 5, 2026, 03:29 PM
Related advisories
- beaver-ui-popover-card@35.4.4
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- dolyame-ui-types@35.8.2
- devplatform-spa-plugin-s3@35.5.9
- devplatform-select-user@35.4.4
- devplatform-snarkdown@35.2.1
- devplatform-nx-husky@35.7.7
- devplatform-react-query-clients@35.7.7
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.