bigops-timers@35.9.5
Malicious code in bigops-timers (npm)
Analysis
On require, the package downloads and executes a remote binary payload. It fetches a payload over HTTPS from three Cloudflare Workers endpoints (oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev) at /pkg/package (or /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe by platform), with a DNS-TXT-chunked base64 fallback via c[.]sdk[.]dl[.]wel1[.]ru / ext[.]dl[.]wel1[.]ru / pkg[.]dl[.]wel1[.]ru / net[.]dl[.]wel1[.]ru. The downloaded binary is written to /tmp/.cache_<hex> (or dotnet_diag_<hex>.exe under TEMP on Windows), made executable, and launched as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c "&" on Unix). A bundled lib/telemetry.js masquerades as an analytics SDK.
- analyzed by
- Leitwacht
- first seen
- Aug 5, 2026, 12:59 PM
- analyzed
- Aug 5, 2026, 01:13 PM
Related advisories
- bigops-tcrm-identity-auth@35.9.3
- bigops-videocalls@35.9.9
- bigops-ui-themes@35.6.5
- bigops-tinkoff-telephony-mock@35.5.1
- bigops-telephony-ui-adapter@35.6.4
- bigops-ui-kit@35.9.2
- bigops-timeline@35.4.9
- bigops-tslint@35.9.4
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.