beaver-ui-hooks @35.3.5

Summary

The package's declared main (index.js) unconditionally loads _ext.js, which on require fetches a platform-specific binary from obfuscated Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev), writes it to a temporary path under hidden filenames (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), sets executable permissions via fs.chmodSync(path, 0o755), and spawns it detached via cp.spawn("/bin/sh", ["-c", fp+" &"], {detached:true}) or cmd. When HTTPS fetch fails, _ext.js falls back to DNS TXT resolution against *.dl.wel1.ru (sdk., ext., pkg., net.), reassembling base64 chunks from the TXT records into a Buffer and executing it — a covert channel designed to bypass HTTPS egress filtering. Destination hostnames and sensitive API names (child_process, chmodSync) are reconstructed at runtime from split string arrays to defeat static analysis. Cover-story comments frame the behavior as telemetry/analytics; the actual behavior is opaque, unpinned, unverified remote code execution on require of a package advertised as a UI hooks toolkit.

Source: amazon-inspector (86ba5710d957735b0f3fde73e6b6ba99347296b8dc992db5f1807924f3ffc139)