Windows Analysis Report
EXTERNAL #U00c3rtztliche Bescheinigung .msg

# Email Security Analysis

## 1. Initial Analysis of Email Structure

**Sender Information:**
- Display name: Marc Nattermann
- Email address: marc1993nattermann@hotmail.de
- Domain: hotmail.de (Microsoft consumer email service)

**Recipient Information:**
- Email address: sschneider@moog.com 
- Domain: moog.com (corporate domain)

**Subject Line:**
- "[EXTERNAL] rtztliche Bescheinigung" (appears to be "rztliche Bescheinigung" - medical certificate in German)

**Email Structure:**
- Simple HTML formatting
- Contains an image attachment
- Message is in German

## 2. Content Analysis

**Message Content:**
- German text: "Vielen Dank, Schnen Urlaub LG Marc Nattermann"
- Translation: "Thank you, nice holiday. Best regards, Marc Nattermann"

The content is extremely brief with no business context or explanation about the "medical certificate" mentioned in the subject line. The brevity and lack of context is unusual for a business communication involving medical documentation.

## 3. Attachment and QR Code Analysis

**Attachment Details:**
- Filename: 20250606_102141.jpg
- Type: JPG image
- Size: Email package is 2.5MB

**Image Content (from description):**
- A blank white background with text "Vielen Dank, Schnen Urlaub LG Marc Nattermann"
- No QR codes, logos, or other elements
- The image only contains the same text as the email body
- No actual medical certificate content despite the subject line

## 4. Key Suspicious Indicators

1. **Subject-content mismatch**: Subject mentions a medical certificate, but neither the email body nor the attachment contains one
2. **Attachment anomaly**: Medical certificates are typically PDF or document files, not JPG images
3. **Lack of context**: No explanation for why this "medical certificate" is being sent
4. **Content duplication**: The image simply contains the same text as the email body
5. **Subject line encoding/spelling issue**: "rtztliche" instead of "rztliche"

## 5. Attack Type Analysis (MITRE ATT&CK)

If malicious, this could align with:
- **Initial Access (TA0001)** via **Phishing: Spearphishing Attachment (T1566.001)**
- Potential for **User Execution (T1204)** if the attachment contains hidden malicious code

## 6. False Positive Analysis

Possible legitimate explanations:
- Could be a thank-you note after receiving medical leave approval
- The sender might have attached the wrong image
- The "medical certificate" might be referenced in previous communications
- The image could be a screenshot of a medical certificate, though the description doesn't support this
- Encoding issues might explain some formatting anomalies

## 7. Overall Assessment

**Sender display name and domain:** Marc Nattermann using a personal Hotmail account
**Previous communication history:** None provided
**Subject line:** "[EXTERNAL] rtztliche Bescheinigung" (Medical Certificate)
**HTML/text content:** Brief thank you message in German
**Attachment metadata:** JPG image (20250606_102141.jpg)
**Image content:** Simple text message matching email body

This email exhibits several suspicious characteristics that warrant caution. The primary concern is the disconnect between the subject line claiming to contain a medical certificate and the actual content, which is just a thank you message. The attachment being a JPG file rather than a document format typical for medical certificates adds to the suspicion.

## 8. IOCs (Indicator of Compromise)

- Sender email: marc1993nattermann@hotmail.de
- Subject: "[EXTERNAL] rtztliche Bescheinigung"
- Attachment: 20250606_102141.jpg

## Conclusion

**Verdict:** Suspicious

**Risk Score:** 5/10

**TTPs Identified:**
- Potential phishing through misleading attachment
- Social usering using medical documentation as a lure

**Reasoning Summary:**
The email claims to contain a medical certificate but instead contains a simple image with text. This mismatch between claimed content and actual content is concerning. However, without evidence of malicious code in the attachment or clear phishing attempts such as credential harvesting links, we cannot conclusively determine malicious intent. The communication could potentially be legitimate but unusual or poorly executed.