Windows Analysis Report
EXTERNAL #U00c3rtztliche Bescheinigung .msg

General Information

Sample name: EXTERNAL #U00c3rtztliche Bescheinigung .msg
renamed because original name is a hash value
Original sample name: EXTERNAL rtztliche Bescheinigung .msg
Analysis ID: 1711313
Has dependencies: false
MD5: b15418abbfe269139e3a692642e623ab
SHA1: d8f88f3a22497e9d2fffb87676cb5aeba80034bc
SHA256: 340abc8d5febd8860161b8983fbdc0b703e18b0806f13f421bb46cf3ec552a66
Infos: sigma

Detection

Score: 1
Range: 0 - 100
Confidence: 80%

Signatures

Queries the volume information (name, serial number etc) of a device
Stores large binary data to the registry

Classification

Source: classification engine Classification label: clean1.winMSG@3/4@0/0
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE File created: C:\Users\user\Documents\Outlook Files\~Outlook Data File - NoEmail.pst.tmp Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE File created: C:\Users\user\AppData\Local\Temp\Outlook Logging\OUTLOOK_16_0_16827_20130-20250610T1320130536-2344.etl Jump to behavior
Source: unknown Process created: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE "C:\Program Files (x86)\Microsoft Office\Root\Office16\OUTLOOK.EXE" /f "C:\Users\user\Desktop\EXTERNAL #U00c3rtztliche Bescheinigung .msg"
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process created: C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe "C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe" "926CE856-E1C1-47B1-9E98-3551C85BAB64" "DE228304-50B1-460F-9BEE-BF6DD87C78F9" "2344" "C:\Program Files (x86)\Microsoft Office\Root\Office16\OUTLOOK.EXE" "WordCombinedFloatieLreOnline.onnx"
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process created: C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe "C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe" "926CE856-E1C1-47B1-9E98-3551C85BAB64" "DE228304-50B1-460F-9BEE-BF6DD87C78F9" "2344" "C:\Program Files (x86)\Microsoft Office\Root\Office16\OUTLOOK.EXE" "WordCombinedFloatieLreOnline.onnx" Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe Section loaded: apphelp.dll Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe Section loaded: c2r64.dll Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe Section loaded: userenv.dll Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe Section loaded: msasn1.dll Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe Section loaded: kernel.appcore.dll Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe Section loaded: cryptsp.dll Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe Section loaded: rsaenh.dll Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe Section loaded: cryptbase.dll Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe Section loaded: gpapi.dll Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun\REGISTRY\MACHINE\Software\Classes\Wow6432Node\CLSID\{F959DBBB-3867-41F2-8E5F-3B8BEFAA81B3}\InprocServer32 Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Window found: window name: SysTabControl32 Jump to behavior
Source: Window Recorder Window detected: More than 3 window changes detected
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Key opened: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\Common Jump to behavior
Source: EXTERNAL #U00c3rtztliche Bescheinigung .msg Static file information: File size 2636288 > 1048576
Stores large binary data to the registry
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Key value created or modified: HKEY_CURRENT_USER\SOFTWARE\Microsoft\IdentityCRL\Immersive\production\Token\{2B379600-B42B-4FE9-A59C-A312FB934935} DeviceTicket Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: FAILCRITICALERRORS | NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: FAILCRITICALERRORS | NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe Process information set: NOGPFAULTERRORBOX | NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Process information queried: ProcessInformation Jump to behavior
Queries the volume information (name, serial number etc) of a device
Source: C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe Queries volume information: C:\Program Files (x86)\Microsoft Office\root\Office16\AI\WordCombinedFloatieLreOnline.onnx VolumeInformation Jump to behavior
Source: C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Office16\ai.exe Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography MachineGuid Jump to behavior 
# 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.
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behaviorgraph top1 process2 2 Behavior Graph ID: 1711313 Sample: EXTERNAL #U00c3rtztliche Be... Startdate: 10/06/2025 Architecture: WINDOWS Score: 1 5 OUTLOOK.EXE 51 80 2->5         started        process3 7 ai.exe 5->7         started       
⊘No contacted IP infos

Contacted Domains

Name IP Active
s-0005.dual-s-msedge.net 52.123.129.14 true