Techniques › T1137.004 › AN0502
AN0502 Analytic 0502
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Adversary uses a tool like Ruler to configure a malicious Outlook folder Home Page that loads a remote or embedded HTML payload upon folder interaction. Execution chain begins with Outlook launching, a specific folder being accessed, and a suspicious child process being spawned or COM-based execution invoked.</p>
- Detects
- T1137.004 Outlook Home Page
- Part of
- DET0177 Detect Persistence via Outlook Home Page Exploitation
Log sources and channels
Exactly as MITRE states them in x_mitre_log_source_references. Where a channel is vague, it is vague in the source; kevmap does not tidy it.
| Log source | Channel | Data component |
|---|---|---|
| WinEventLog:Sysmon | EventCode=1 | DC0032 Process Creation |
| WinEventLog:Sysmon | EventCode=7 | DC0016 Module Load |
| WinEventLog:Application | Outlook logs indicating failure to load or render HTML page in Home Page view | DC0038 Application Log Content |
| WinEventLog:PowerShell | Execution of PowerShell script to enumerate or remove malicious Home Page folder config | DC0064 Command Execution |
Mutable elements
Parameters MITRE marks as environment-specific. These are the knobs you are expected to tune; they are why an analytic is not a rule.
| Field | Description |
|---|---|
TargetFolder | Home Page can be configured on any folder like Calendar, Inbox, or custom folders |
HTMLPayloadLocation | The Home Page URL may point to internal or external content, hosted on trusted or unknown domains |
ChildProcessName | Execution may result in launch of scripting hosts (e.g., mshta.exe, wscript.exe) from outlook.exe |
TimeWindow | Execution may occur only when the specific folder is accessed after launch, not immediately at startup |
FormViewBehavior | Behavior may vary if the folder's form view is customized or suppressed via GPO |