statist-browser-typed-client-investing.product.loginandauthorization@20.7.3
Malicious code in statist-browser-typed-client-investing.product.loginandauthorization (npm)
Analysis
On require(), the package loads _bridge.js which fingerprints the host OS and architecture, then contacts three Cloudflare Workers C2 endpoints (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev) over HTTPS to download a platform-specific binary payload. The downloaded binary is written to /var/tmp/.cache_<random-hex> (Linux/macOS) or %TEMP%\dotnet_diag_<random-hex>.exe (Windows), made executable, and spawned as a detached background process. If the HTTPS download fails, the package falls back to a DNS TXT-based exfiltration channel via c[.]tin[.]dl[.]well1[.]site to reconstruct the payload from base64-encoded TXT records. A 20723-second cooldown prevents repeated downloads. The package has no repository, no meaningful README, and its sole purpose is to deliver and execute a remote second-stage binary.
- analyzed by
- Leitwacht
- first seen
- Aug 2, 2026, 03:42 PM
- analyzed
- Aug 2, 2026, 03:43 PM
Related advisories
- pfp-forms-insurance-health@20.2.2
- fry-page-maker-types@20.6.4
- statist-browser-typed-client-itsa.digitalinterview.events@20.8.2
- tinkoff-pfp-block-mobile-advert-footer@20.3.3
- tinkoff-statist-browser-typed-client-sme.compliance.web.events@20.4.4
- statist-browser-typed-client-social.shorts.editor@20.7.1
- pfp-forms-sme-sitebuilder@20.2.1
- cardsmobile-collection@20.4.6
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.