### Overview
The initial alert identified a **suspicious email** likely associated with a phishing attempt. This is often the first step in APT10's strategy to deliver malicious payloads.

### Detailed Analysis
- **Sender's Email:** The email originated from a domain resembling a known vendor, indicating a possible **spear-phishing** attempt.
- **Content:** The email contained a link to a compromised website designed to harvest credentials.
- **Attachment:** A malicious document file was attached, likely containing a macro to execute malware upon opening.

### Next Steps
- **Containment:** Block the sender's domain and similar variants.
- **Awareness:** Educate employees on identifying phishing attempts.
- **Monitoring:** Increase surveillance on network activities for any unauthorized application executions, which could indicate successful malware deployment.