Techniques › T1546.008 › AN0094
AN0094 Analytic 0094
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Defenders can observe suspicious replacement or tampering of system accessibility binaries (e.g., utilman.exe, sethc.exe, osk.exe) and anomalous modifications to registry keys used to redirect accessibility programs (such as IFEO keys). Additionally, execution of cmd.exe or other suspicious binaries triggered from the login screen by SYSTEM can be correlated as part of a behavior chain.</p>
- Detects
- T1546.008 Accessibility Features
- Part of
- DET0033 Detection Strategy for Accessibility Feature Hijacking via Binary Replacement or Registry Modification
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:Sysmon | EventCode=11 | DC0039 File Creation |
| WinEventLog:Sysmon | EventCode=1 | DC0032 Process Creation |
| WinEventLog:Sysmon | EventCode=13, 14 | DC0063 Windows Registry Key Modification |
| WinEventLog:Sysmon | EventCode=15 | DC0059 File Metadata |
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 |
|---|---|
TimeWindow | Time between registry modification and suspicious binary execution (e.g., < 1 hour) can be tuned. |
TargetBinaryNames | Specific binaries monitored (e.g., utilman.exe, sethc.exe) can be adjusted per OS version and risk tolerance. |
ParentProcess | Parent process of cmd.exe (e.g., winlogon.exe) may vary across legitimate and adversarial cases. |
UserContext | Context of SYSTEM account execution vs. administrative sessions may influence tuning. |
CommandLineContains | Tunable patterns such as launching cmd.exe, powershell, or LOLBins from accessibility binaries. |