### Summary
The adversary has established persistence on the compromised system through the creation of a scheduled task designed to execute malicious scripts at regular intervals.

### Technical Details
- **Scheduled Task Name:** 'System Maintenance'
- **Script Execution:** Powershell scripts obfuscated to avoid detection
- **Persistence Goal:** Maintain access and facilitate further lateral movement

### Recommendations
- Disable and remove unauthorized scheduled tasks.
- Implement continuous monitoring for any new task creation attempts.