Techniques › T1566.001 › AN0655
AN0655 Analytic 0655
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detection of spearphishing attachments by correlating suspicious email delivery with subsequent file creation and abnormal process execution (e.g., Office spawning PowerShell or CMD). Behavior chain includes inbound email metadata → attachment stored on disk → process execution → outbound network activity.</p>
- Detects
- T1566.001 Spearphishing Attachment
- Part of
- DET0236 Detection Strategy for Spearphishing Attachment across OS Platforms
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 |
|---|---|---|
| m365:unified | Send/Receive: Inbound emails with attachments from suspicious or spoofed senders | DC0038 Application Log Content |
| WinEventLog:Sysmon | EventCode=11 | DC0039 File Creation |
| WinEventLog:Sysmon | EventCode=1 | DC0032 Process Creation |
| WinEventLog:Sysmon | EventCode=3, 22 | DC0082 Network Connection Creation |
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 |
|---|---|
AttachmentExtensions | List of high-risk extensions to monitor (e.g., .exe, .js, .vbs, .docm, .xlsm). |
SuspiciousParentChildPairs | Process lineage patterns considered malicious (e.g., winword.exe → powershell.exe). |
TimeWindow | Correlation window between email receipt, file creation, and process execution. |
KEV CVEs whose mapped technique this analytic detects
| CVE | Vendor / product | State |
|---|---|---|
| CVE-2013-0640 | Adobe Reader and Acrobat | Mapped |
| CVE-2017-11292 | Adobe Flash Player | Mapped |
| CVE-2017-11882 | Microsoft Office | Mapped |
| CVE-2022-41033 | Microsoft Windows COM+ Event System Service | Mapped |
| CVE-2023-2868 | Barracuda Networks Email Security Gateway (ESG) Appliance | Mapped |
| CVE-2025-0411 | 7-Zip 7-Zip | Mapped |
| CVE-2025-33053 | Microsoft Windows | Mapped |