The 'backup3-ff' package in the npm ecosystem is identified as containing malicious code that results in a full compromise of the host system. This means attackers potentially gain complete control over the affected computer. Due to the nature of the compromise, sensitive information such as secrets and keys stored on the system are at risk and must be rotated from a secure environment. The package removal is necessary but insufficient to fully remediate the infection, as additional malicious artifacts may persist.

Full system compromise on any computer with the 'backup3-ff' package installed or running. Potential exposure and theft of all secrets and keys stored on the system. Persistent malicious presence may remain even after package removal.

Immediately remove the 'backup3-ff' package from all affected systems. Rotate all secrets and keys that were stored on the compromised computers from a separate, secure device. Conduct a thorough investigation and remediation of the affected systems to identify and remove any residual malicious software. Because the compromise is severe, consider rebuilding affected systems from known good backups or reinstalling the operating system.