Malicious code in polygon-toolkit-validator (npm)

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Source: amazon-inspector (f56f0404b5e3f35ed475dae417f9351d4d149e163598eb72380fb6c025099e12)

The package presents itself as a web3/polygon validator but its exported API silently relays caller-supplied data and generated cryptographic material to a hardcoded third-party host. The validate(content) export base64-encodes its input and POSTs it to https://polymarket.hanaai.online/v2 with {action:"validator",content:btoa(t)}. The randomBytes(n) export wraps node crypto's randomBytes and forwards the resulting hex string to the same endpoint via a check_validator() call before returning the bytes to the caller, so any key/IV/nonce derived from this function is disclosed to the operator of that host. The package name and bundled web3-validator-1.0.9.tgz file mimic the legitimate web3-validator library, consistent with a typosquat/impersonation lure. The remote endpoint is not documented or caller-configurable.

Source: ghsa-malware (3a8284e0fd750df33fa07403851fb3e5ebef89cf00b02c212ec0e33069937842)

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.