Techniques › T1491.001 › AN0229
AN0229 Analytic 0229
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Adversary modifies internal UI messages (e.g., login banners, desktop wallpapers) or hosted intranet web pages by creating or altering content files using scripts or unauthorized access. Often preceded by privilege escalation or web shell deployment.</p>
- Detects
- T1491.001 Internal Defacement
- Part of
- DET0082 Internal Website and System Content Defacement via UI or Messaging Modifications
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:Security | EventCode=4663, 4670, 4656 | DC0055 File Access |
| WinEventLog:Sysmon | EventCode=11 | DC0039 File Creation |
| WinEventLog:Sysmon | EventCode=2 | DC0061 File Modification |
| WinEventLog:Sysmon | EventCode=1 | DC0032 Process 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 |
|---|---|
FilePathPattern | Location of web content or system UI config files that may vary across deployments (e.g., %SystemRoot%\Web, %APPDATA%\wallpaper.jpg) |
TimeWindow | Allowed hours for file/content modification events; defacement likely occurs during off-hours |
UserContext | System or domain accounts used to perform the modifications may be anomalous |