bigops-stylelint@35.4.3
Malicious code in bigops-stylelint (npm)
Analysis
bigops-stylelint@35.4.3 (a combosquat of the stylelint package) runs a dropper on require. index.js loads _bootstrap.js, which downloads a platform-specific binary from Cloudflare Workers endpoints oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, and oob-worker[.]cf101-adf[.]workers[.]dev at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, and /pkg/package.exe. If HTTPS fails it falls back to DNS TXT-based payload retrieval via c[.]sdk[.]dl[.]wel1[.]ru (and sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru). The downloaded payload is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in the temp dir on Windows), made executable, and launched as a detached background process via /bin/sh -c "<path> &" or cmd.exe /c start /b. The package also ships a decoy lib/telemetry.js analytics module. Rate-limited by a stamp file at /tmp/.analytics_state.
- analyzed by
- Leitwacht
- first seen
- Aug 5, 2026, 12:58 PM
- analyzed
- Aug 5, 2026, 01:03 PM
Related advisories
- bigops-umf-statist@35.3.1
- @zahlen/checkout-angular@0.1.4
- @zahlen/checkout-react@0.1.1
- @zahlen/checkout@0.2.2
- simplipayng@1.0.8
- @simplipayng/checkout@1.4.3
- @nasddatax/common@1.0.21
- @hoteldev/common@1.0.9
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.