### Overview
The initial access vector leveraged by APT3 involves a sophisticated phishing campaign targeting key personnel within organizations. The emails are highly tailored, often using spear-phishing techniques to increase the likelihood of success.

### Key Indicators
- **Email Subjects:** Typically reference urgent business matters or IT notifications.
- **Attachments:** Microsoft Word documents or PDFs containing embedded malicious scripts.

### Recommendations
- Implement advanced email filtering solutions.
- Conduct employee awareness training sessions focusing on phishing detection.

### Next Steps
Prepare for potential exploitation attempts, as this report indicates a successful initial access attempt.