The crossmint-wallets-sdk package version 1.0.0 is a typosquatting malicious npm package that executes code during the npm install preinstall lifecycle event. It imports child_process, reads the hostname of the host machine, and sends this information via HTTPS POST to a hardcoded external endpoint. This exfiltration occurs before any user code runs, enabling credential and reconnaissance data theft from developers or build systems installing the package. Due to the nature of this attack, any system with this package installed is considered fully compromised.

Installation of this malicious package leads to immediate exfiltration of host identifiers to an attacker-controlled server. This compromises the confidentiality of the host environment and may allow attackers to gain further access or control. The compromise is severe enough that all secrets and keys on the affected system should be considered exposed and require immediate rotation. The presence of this package indicates a full system compromise with potential persistence beyond package removal.

There is no official patch or fix available for this malicious package. The affected package version is 1.0.0 and should be removed immediately. Systems with this package installed must be treated as fully compromised. All secrets, credentials, and keys stored on the affected system should be rotated from a different, secure machine. Additional forensic analysis and remediation may be necessary to ensure complete removal of any backdoors or malware installed as a result of this package.