Techniques › T1055.011 › AN0608
AN0608 Analytic 0608
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detects adversary manipulation of Extra Window Memory (EWM) in a GUI process, where the attacker uses SetWindowLong or SetClassLong to redirect function pointers to injected shellcode stored in shared memory, then triggers execution via a window message like SendNotifyMessage.</p>
- Detects
- T1055.011 Extra Window Memory Injection
- Part of
- DET0217 Detection Strategy for Extra Window Memory (EWM) Injection on Windows
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=10 | DC0035 Process Access |
| etw:Microsoft-Windows-Win32k | SetWindowLong, SetClassLong, NtUserMessageCall, SendNotifyMessage, PostMessage | DC0021 OS API Execution |
| WinEventLog:Security | EventCode=4688 | 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 |
|---|---|
TargetWindowClassRegex | Regex to scope suspicious or uncommon GUI class names registered by user-created processes |
ExecutionTriggerWindowMessage | API calls like SendNotifyMessage or PostMessage that deliver execution to the shellcode location |
SharedSectionWriteThreshold | Set byte count thresholds on suspicious memory writes to known shared sections |
TimeWindowSetWindowLongToMessageTrigger | Define max time (e.g., <10s) between API call to set window memory and the message call to trigger it |