Techniques › T1491.001 › AN0230
AN0230 Analytic 0230
Linux · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Adversary leverages root or sudo access to alter system banners, web content directories (e.g., /var/www/html), or login configurations (/etc/issue). File creation or overwrites may coincide with suspicious script execution or cron job activity.</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 |
|---|---|---|
| auditd:SYSCALL | open/write/unlink | DC0061 File Modification |
| auditd:SYSCALL | execve | DC0032 Process Creation |
| linux:syslog | sudo or su access prior to content change | DC0010 User Account Modification |
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 |
|---|---|
TargetDirectories | Paths like /var/www/html, /etc/issue, or /etc/motd may vary across distros |
UserContext | Non-web-admin users modifying site content or banners should be rare |
TimeWindow | Defacement often happens outside normal maintenance hours |