Techniques › T1497.003 › AN0398
AN0398 Analytic 0398
macOS · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Use of
usleep, nanosleep, or NSTimer calls in executables or binaries with no GUI interaction, especially followed by disk/network activity.</p>- Detects
- T1497.003 Time Based Checks
- Part of
- DET0141 Detect Time-Based Evasion via Sleep, Timer Loops, and Delayed Execution
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 | application logs referencing NSTimer, sleep, or launchd delays | DC0021 OS API Execution |
| 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 |
|---|---|
AppBundleIdentifier | Correlate with known/expected signed apps vs. unsigned binaries to reduce noise. |
TimeToNextEvent | Minimum time expected between process start and observable I/O for normal apps. |