### Overview
The operation has culminated in a **massive data exfiltration** event, affecting billions of Yahoo accounts. Attackers have successfully extracted vast quantities of user data.

### Methods of Exfiltration
- **Encrypted Channel Use:** Data was transferred out using encrypted channels, minimizing detection by standard monitoring tools.
- **Batch Processing:** Data was exfiltrated in small batches over time to evade detection thresholds.

### Impact Assessment
The scale of this data breach is unprecedented, with implications for billions of users worldwide. The involvement of state-sponsored actors is strongly indicated.

### Conclusion
Immediate efforts should focus on containment, mitigation, and user notification, along with a comprehensive review of security protocols to prevent future incidents.