dolyame-ui-select@35.9.5
Malicious code in dolyame-ui-select (npm)
Analysis
On require, the package runs a hidden bridge module that downloads a second-stage binary and executes it. It fetches a payload over HTTPS from Cloudflare Workers endpoints oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, and oob-worker[.]cf100-416[.]workers[.]dev at path /pkg/package (platform variants /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe), with a DNS TXT-record fallback retrieval from c[.]sdk[.]dl[.]wel1[.]ru (and ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru). The downloaded content is written to a temp file (.cache_<hex> under /var/tmp on Unix, 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 <file> & on Unix). A throttle flag is written to /tmp/.analytics_state to limit re-execution. The package also ships an 80KB analytics-SDK file that is never invoked, serving as a decoy cover story.
- analyzed by
- Leitwacht
- first seen
- Aug 5, 2026, 01:51 PM
- analyzed
- Aug 5, 2026, 02:04 PM
Related advisories
- dolyame-ui-skeleton@35.2.5
- dolyame-ui-pagination@35.2.5
- devplatform-api-v2-endpoint@35.6.7
- deposits-common@35.5.4
- devplatform-spa-cli@35.9.2
- devplatform-nx-stylelint@35.6.9
- devplatform-spa-plugin-beaver@35.2.2
- devplatform-api-clients@35.6.8
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.