If this package is installed
Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.
Details
Source: amazon-inspector (3e20a9180ff2928b0498496b59c96983db044063b8db7c5e258b6518d5daf00a)
On require() of this package, index.js loads _bridge.js which downloads a platform-specific binary from hardcoded Cloudflare Workers hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev), with a DNS-TXT fallback channel over sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru that reassembles a base64-encoded payload from TXT records. The fetched bytes are written under /tmp or %TEMP% with a disguised filename (`.cache_<hex>` or `dotnet_diag_<hex>.exe`), chmodded 0755, and spawned detached via `/bin/sh -c` or `cmd.exe`. The C2 host strings and the `child_process` module name are split across array joins (`["oob-worker.cf103-070.wo","rk","ers",".de","v"].join("")`, `require("child_"+"process")`) to evade static matching. Cover-story identifiers (`analytics_state`, `DISABLE_TELEMETRY`) frame the drop as telemetry. A second, structurally identical dropper ships in lib/telemetry.js (~81 KB) dressed as an analytics SDK: dynamic `require("child_"+"process")`, base64 buffer reassembly, `chmodSync(..., 0o755)`, and `cp.spawn("/bin/sh", ["-c", filePath+" &"],...)`.
Source: ghsa-malware (176764d97e59476107ea84a11437ba6719446a8f96682c7c6f46284e15f284a1)
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.