devplatform-jscodeshift-utils@35.3.8
Malicious code in devplatform-jscodeshift-utils (npm)
Analysis
On require, the package downloads and executes a remote binary. It fingerprints the OS/architecture, then fetches a payload over HTTPS from Cloudflare Workers endpoints oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, and oob-worker[.]cf102-baf[.]workers[.]dev (paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe), with a fallback download channel that reassembles base64 chunks served via DNS TXT records under c[.]sdk[.]dl[.]wel1[.]ru. The downloaded content is written to a hidden cache file (.cache_<hex> in /var/tmp, or dotnet_diag_<hex>.exe in the temp dir on Windows), made executable, and launched as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c "&" on Unix).
- analyzed by
- Leitwacht
- first seen
- Aug 5, 2026, 01:33 PM
- analyzed
- Aug 5, 2026, 03:04 PM
Related advisories
- devplatform-api-v2-resource-mock@35.4.1
- devplatform-react-form@35.8.3
- devplatform-po-loader@35.1.8
- devplatform-spa-plugin-devtools@35.5.6
- devplatform-api-v2-resources@35.3.8
- devplatform-ui-notification@35.3.6
- dolyame-boxy-atom-bnpl-dangerously-html@35.5.4
- devplatform-spa-plugin-root-devtools@35.5.6
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.