Techniques › T1553.004 › AN0155
AN0155 Analytic 0155
macOS · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detection of malicious certificate installation via monitoring execution of the
security add-trusted-cert command and modifications to system keychains.</p>- Detects
- T1553.004 Install Root Certificate
- Part of
- DET0056 Detection Strategy for Subvert Trust Controls via Install Root Certificate.
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 |
|---|---|---|
| macos:unifiedlog | Execution of /usr/bin/security add-trusted-cert or keychain modifications to System.keychain | DC0064 Command Execution |
| macos:osquery | query: Enumeration of root certificates showing unexpected additions | DC0061 File 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 |
|---|---|
MonitoredCommands | Commands related to certificate management (e.g., security, profiles) that can be tuned per environment. |
KeychainBaseline | Baseline of expected certificates in System.keychain to reduce false positives from legitimate enterprise certificates. |