### Script Analysis

The suspicious PowerShell script executed on the compromised endpoint was obfuscated to evade detection. The script attempted to download additional payloads from a remote server using encoded commands. This behavior is consistent with the initial stages of malware deployment.

### Mitigation Steps

1. **Isolation:** Disconnect the affected machine from the network immediately.
2. **Forensic Analysis:** Capture a memory dump for further investigation.
3. **Monitoring:** Enhance monitoring on PowerShell logs and network traffic to detect other possible execution attempts.

### Preparing for Persistence

Be vigilant for signs of persistence mechanisms, such as unusual changes in registry keys or scheduled tasks.