dolyame-ui-attachfile@35.8.1
Malicious code in dolyame-ui-attachfile (npm)
Analysis
On load, the package runs a bundled dropper (_shim.js) that fingerprints the OS/architecture and downloads a binary payload over HTTPS from three Cloudflare Workers hosts (oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev) at per-platform paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, and /pkg/package.exe. If the HTTP download fails it falls back to a DNS-TXT command channel under the domains sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, and net[.]dl[.]wel1[.]ru (querying c.<domain> for a chunk count, then base64 chunks from N.<domain>). The downloaded payload is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in TEMP on Windows), made executable, and launched as a detached background process via /bin/sh -c or cmd.exe start /b. The package also writes a marker file (~/.analytics_state or %TEMP%\analytics_state) to throttle re-execution.
- analyzed by
- Leitwacht
- first seen
- Aug 7, 2026, 11:25 AM
- analyzed
- Aug 7, 2026, 11:25 AM
Related advisories
- eacq-core@35.8.1
- dolyame-ui-memoizeweak@35.8.1
- dolyame-ui-dataqa@35.8.1
- streak-kit-map@1.0.0
- ded-pwa-c-boxy@35.9.1
- devplatform-stylelint-config@35.7.4
- khanbmnxls@1.0.0
- weight2loss@1.0.5
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.